Revert "Instrument usage of bug with iteration of String with offset or 0 limit (#1667)"

This reverts commit c743936a78.

.github/dependabot.yaml

@@ -1,6 +0,0 @@
-version: 2
-updates:
-  - package-ecosystem: github-actions
-    directory: "/"
-    schedule:
-      interval: weekly

.github/workflows/liquid.yml

@@ -1,5 +1,5 @@
 name: Liquid
-on: [push]
+on: [push, pull_request]
 
 env:
   BUNDLE_JOBS: 4
@@ -9,65 +9,27 @@ jobs:
   test:
     runs-on: ubuntu-latest
     strategy:
-      fail-fast: false
       matrix:
         entry:
-          - { ruby: 3.3, allowed-failure: false } # minimum supported
-          - { ruby: 3.4, allowed-failure: false, rubyopt: "--yjit" }
-          - { ruby: 4.0, allowed-failure: false } # latest stable
-          - {
-              ruby: 4.0,
-              allowed-failure: false,
-              rubyopt: "--enable-frozen-string-literal",
-            }
-          - { ruby: 4.0, allowed-failure: false, rubyopt: "--yjit" }
-          - { ruby: 4.0, allowed-failure: false, rubyopt: "--zjit" }
-          - { ruby: truffleruby, allowed-failure: false }
-
-          # Head can have failures due to being in development
-          - { ruby: head, allowed-failure: true }
-          - {
-              ruby: head,
-              allowed-failure: true,
-              rubyopt: "--enable-frozen-string-literal",
-            }
-          - { ruby: head, allowed-failure: true, rubyopt: "--yjit" }
-          - { ruby: head, allowed-failure: true, rubyopt: "--zjit" }
-    name: Test Ruby ${{ matrix.entry.ruby }} ${{ matrix.entry.rubyopt }} --${{ matrix.entry.allowed-failure && 'allowed-failure' || 'strict' }}
+          - { ruby: 2.7, allowed-failure: false } # minimum supported
+          - { ruby: 3.2, allowed-failure: false } # latest
+          - { ruby: ruby-head, allowed-failure: true }
+    name: Test Ruby ${{ matrix.entry.ruby }}
     steps:
-      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
-      - uses: ruby/setup-ruby@319994f95fa847cf3fb3cd3dbe89f6dcde9f178f # v1.295.0
+      - uses: actions/checkout@v3
+      - uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.entry.ruby }}
           bundler-cache: true
-          bundler: latest
       - run: bundle exec rake
         continue-on-error: ${{ matrix.entry.allowed-failure }}
-        env:
-          RUBYOPT: ${{ matrix.entry.rubyopt }}
-
-  spec:
-    runs-on: ubuntu-latest
-    env:
-      BUNDLE_WITH: spec
-    steps:
-      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
-      - uses: ruby/setup-ruby@319994f95fa847cf3fb3cd3dbe89f6dcde9f178f # v1.295.0
-        with:
-          bundler-cache: true
-          bundler: latest
-      - name: Run liquid-spec for all adapters
-        run: |
-          for adapter in spec/*.rb; do
-            echo "=== Running $adapter ==="
-            bundle exec liquid-spec run "$adapter" --no-max-failures
-          done
 
   memory_profile:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
-      - uses: ruby/setup-ruby@319994f95fa847cf3fb3cd3dbe89f6dcde9f178f # v1.295.0
+      - uses: actions/checkout@v3
+      - uses: ruby/setup-ruby@v1
         with:
+          ruby-version: 2.7
           bundler-cache: true
       - run: bundle exec rake memory_profile:run

.gitignore

@@ -4,6 +4,7 @@
 pkg
 *.rbc
 .rvmrc
+.ruby-version
+Gemfile.lock
 .bundle
 .byebug_history
-Gemfile.lock

.rubocop.yml

@@ -10,8 +10,8 @@ Performance:
   Enabled: true
 
 AllCops:
+  TargetRubyVersion: 2.7
   NewCops: disable
-  SuggestExtensions: false
   Exclude:
     - 'vendor/bundle/**/*'
 
@@ -19,10 +19,6 @@ Naming/MethodName:
   Exclude:
     - 'example/server/liquid_servlet.rb'
 
-Style/ClassMethodsDefinitions:
-  Enabled: false
-
-# liquid filter calls were being mistaken to be calls on arrays
-Style/ConcatArrayLiterals:
-  Exclude:
-    - 'test/integration/standard_filter_test.rb'
+# Backport https://github.com/Shopify/ruby-style-guide/pull/258
+Layout/BeginEndAlignment:
+  Enabled: true

.rubocop_todo.yml

@@ -174,16 +174,7 @@ Style/WordArray:
 
 # Offense count: 117
 # This cop supports safe auto-correction (--auto-correct).
-# Configuration parameters: AllowHeredoc, AllowURI, URISchemes, AllowCopDirectives, AllowedPatterns.
+# Configuration parameters: AllowHeredoc, AllowURI, URISchemes, IgnoreCopDirectives, AllowedPatterns, IgnoredPatterns.
 # URISchemes: http, https
 Layout/LineLength:
   Max: 260
-
-Naming/PredicatePrefix:
-  Enabled: false
-
-# Offense count: 1
-# This is intentional - early return from begin/rescue in assignment context
-Lint/NoReturnInBeginEndBlocks:
-  Exclude:
-    - 'lib/liquid/standardfilters.rb'

.ruby-version

@@ -1 +0,0 @@
-4.0.2

CONTRIBUTING.md

@@ -26,11 +26,3 @@
 * If it makes sense, add tests for your code and/or run a performance benchmark
 * Make sure all tests pass (`bundle exec rake`)
 * Create a pull request
-
-## Releasing
-
-* Bump the version in `lib/liquid/version.rb`
-* Update the `History.md` file
-* Open a PR like [this one](https://github.com/Shopify/liquid/pull/1894) and merge it to `main`
-* Create a new release using the [GitHub UI](https://github.com/Shopify/liquid/releases/new)
-

Gemfile

@@ -7,32 +7,21 @@ end
 
 gemspec
 
-gem "base64"
-
 group :benchmark, :test do
   gem 'benchmark-ips'
   gem 'memory_profiler'
   gem 'terminal-table'
-  gem "lru_redux"
 
   install_if -> { RUBY_PLATFORM !~ /mingw|mswin|java/ && RUBY_ENGINE != 'truffleruby' } do
     gem 'stackprof'
   end
 end
 
-group :development do
-  gem "webrick"
-end
-
 group :test do
-  gem 'benchmark'
-  gem 'rubocop', '~> 1.82.0'
-  gem 'rubocop-shopify', '~> 2.18.0', require: false
+  gem 'rubocop-shopify', '~> 2.7.0', require: false
   gem 'rubocop-performance', require: false
-end
 
-group :spec do
-  # Using feature branch until https://github.com/Shopify/liquid-spec/pull/144 is merged
-  gem 'liquid-spec', github: 'Shopify/liquid-spec', branch: 'self-drop-env-lookup-specs'
-  gem 'activesupport', require: false
+  platform :mri, :truffleruby do
+    gem 'liquid-c', github: 'Shopify/liquid-c', ref: 'master'
+  end
 end

History.md

@@ -1,103 +1,5 @@
 # Liquid Change Log
 
-## 5.13.0
-
-* Add TruffleRuby in CI [Benoit Daloze]
-* Skip slow test raising many exceptions on non-CRuby [Benoit Daloze]
-* Reject bare-bracket syntax in strict2 and introduce `self` keyword by [Alok Swamy]
-* Add strict2_parse to assign and capture tags by [Alok Swamy]
-* Add strict2_parse to increment and decrement tags by [Alok Swamy]
-* Update liquid-spec adapters for `missing_features` [Ian Ker-Seymer]
-* Prevent `SelfDrop` context mutation across render boundaries [Guilherme Carreiro]
-* Fix `SelfDrop` equality [Guilherme Carreiro]
-* Let environment `self` shadow `SelfDrop` [Ian Ker-Seymer]
-
-## 5.11.0
-* Revert the Inline Snippets tag (#2001), treat its inclusion in the latest Liquid release as a bug, and allow for feedback on RFC#1916 to better support Liquid developers [Guilherme Carreiro]
-* Rename the `:rigid` error mode to `:strict2` and display a warning when users attempt to use the `:rigid` mode [Guilherme Carreiro]
-
-## 5.10.0
-* Introduce support for Inline Snippets [Julia Boutin]
-
-## 5.9.0
-* Introduce `:rigid` error mode for stricter, safer parsing of all tags [CP Clermont, Guilherme Carreiro]
-
-## 5.8.7
-* Expose body content in the `Doc` tag [James Meng]
-
-## 5.8.1
-
-* Fix `{% doc %}` tag to be visitable [Guilherme Carreiro]
-
-## 5.8.0
-
-* Introduce the new `{% doc %}` tag [Guilherme Carreiro]
-
-## 5.7.3
-
-* Raise Liquid::SyntaxError when parsing invalidly encoded strings [Chris AtLee]
-
-## 5.7.2 2025-01-31
-
-* Fix array filters to not support nested properties [Guilherme Carreiro]
-
-## 5.7.1 2025-01-24
-
-* Fix the `find` and `find_index`filters to return `nil` when filtering empty arrays [Guilherme Carreiro]
-* Fix the `has` filter to return `false` when filtering empty arrays [Guilherme Carreiro]
-
-## 5.7.0 2025-01-16
-
-### Features
-
-* Add `find`, `find_index`, `has`, and `reject` filters to arrays [Guilherme Carreiro]
-* Compatibility with Ruby 3.4 [Ian Ker-Seymer]
-
-## 5.6.4 2025-01-14
-
-### Fixes
-* Add a default `string_scanner` to avoid errors with `Liquid::VariableLookup.parse("foo.bar")` [Ian Ker-Seymer]
-
-## 5.6.3 2025-01-13
-* Remove `lru_redux` dependency [Michael Go]
-
-## 5.6.2 2025-01-13
-
-### Fixes
-* Preserve the old behavior of requiring floats to start with a digit [Michael Go]
-
-## 5.6.1 2025-01-13
-
-### Performance improvements
-* Faster Expression parser / Tokenizer with StringScanner [Michael Go]
-
-## 5.6.0 2024-12-19
-
-### Architectural changes
-* Added new `Environment` class to manage configuration and state that was previously stored in `Template` [Ian Ker-Seymer]
-* Moved tag registration from `Template` to `Environment` [Ian Ker-Seymer]
-* Removed `StrainerFactory` in favor of `Environment`-based strainer creation [Ian Ker-Seymer]
-* Consolidated standard tags into a new `Tags` module with `STANDARD_TAGS` constant [Ian Ker-Seymer]
-
-### Performance improvements
-* Optimized `Lexer` with a new `Lexer2` implementation using jump tables for faster tokenization, requires Ruby 3.4 [Ian Ker-Seymer]
-* Improved variable rendering with specialized handling for different types [Michael Go]
-* Reduced array allocations by using frozen empty constants [Michael Go]
-
-### API changes
-* Deprecated several `Template` class methods in favor of `Environment` methods [Ian Ker-Seymer]
-* Added deprecation warnings system [Ian Ker-Seymer]
-* Changed how filters and tags are registered to use Environment [Ian Ker-Seymer]
-
-### Fixes
-* Fixed table row handling of break interrupts [Alex Coco]
-* Improved variable output handling for arrays [Ian Ker-Seymer]
-* Fix Tokenizer to handle null source value (#1873) [Bahar Pourazar]
-
-## 5.5.0 2024-03-21
-
-Please reference the GitHub release for more information.
-
 ## 5.4.0 2022-07-29
 
 ### Breaking Changes

README.md

@@ -1,11 +1,11 @@
-[![Build status](https://github.com/Shopify/liquid/actions/workflows/liquid.yml/badge.svg)](https://github.com/Shopify/liquid/actions/workflows/liquid.yml)
+[![Build Status](https://api.travis-ci.org/Shopify/liquid.svg?branch=master)](http://travis-ci.org/Shopify/liquid)
 [![Inline docs](http://inch-ci.org/github/Shopify/liquid.svg?branch=master)](http://inch-ci.org/github/Shopify/liquid)
 
 # Liquid template engine
 
 * [Contributing guidelines](CONTRIBUTING.md)
 * [Version history](History.md)
-* [Liquid documentation from Shopify](https://shopify.dev/docs/api/liquid)
+* [Liquid documentation from Shopify](https://shopify.dev/api/liquid)
 * [Liquid Wiki at GitHub](https://github.com/Shopify/liquid/wiki)
 * [Website](http://liquidmarkup.org/)
 
@@ -52,61 +52,19 @@ For standard use you can just pass it the content of a file and call render with
 @template.render('name' => 'tobi')                # => "hi tobi"
 ```
 
-### Concept of Environments
-
-In Liquid, a "Environment" is a scoped environment that encapsulates custom tags, filters, and other configurations. This allows you to define and isolate different sets of functionality for different contexts, avoiding global overrides that can lead to conflicts and unexpected behavior.
-
-By using environments, you can:
-
-1. **Encapsulate Logic**: Keep the logic for different parts of your application separate.
-2. **Avoid Conflicts**: Prevent custom tags and filters from clashing with each other.
-3. **Improve Maintainability**: Make it easier to manage and understand the scope of customizations.
-4. **Enhance Security**: Limit the availability of certain tags and filters to specific contexts.
-
-We encourage the use of Environments over globally overriding things because it promotes better software design principles such as modularity, encapsulation, and separation of concerns.
-
-Here's an example of how you can define and use Environments in Liquid:
-
-```ruby
-user_environment = Liquid::Environment.build do |environment|
-  environment.register_tag("renderobj", RenderObjTag)
-end
-
-Liquid::Template.parse(<<~LIQUID, environment: user_environment)
-  {% renderobj src: "path/to/model.obj" %}
-LIQUID
-```
-
-In this example, `RenderObjTag` is a custom tag that is only available within the `user_environment`.
-
-Similarly, you can define another environment for a different context, such as email templates:
-
-```ruby
-email_environment = Liquid::Environment.build do |environment|
-  environment.register_tag("unsubscribe_footer", UnsubscribeFooter)
-end
-
-Liquid::Template.parse(<<~LIQUID, environment: email_environment)
-  {% unsubscribe_footer %}
-LIQUID
-```
-
-By using Environments, you ensure that custom tags and filters are only available in the contexts where they are needed, making your Liquid templates more robust and easier to manage. For smaller projects, a global environment is available via `Liquid::Environment.default`.
-
 ### Error Modes
 
 Setting the error mode of Liquid lets you specify how strictly you want your templates to be interpreted.
 Normally the parser is very lax and will accept almost anything without error. Unfortunately this can make
 it very hard to debug and can lead to unexpected behaviour.
 
-Liquid also comes with different parsers that can be used when editing templates to give better error messages
+Liquid also comes with a stricter parser that can be used when editing templates to give better error messages
 when templates are invalid. You can enable this new parser like this:
 
 ```ruby
-Liquid::Environment.default.error_mode = :strict2 # Raises a SyntaxError when invalid syntax is used in all tags
-Liquid::Environment.default.error_mode = :strict  # Raises a SyntaxError when invalid syntax is used in some tags
-Liquid::Environment.default.error_mode = :warn    # Adds strict errors to template.errors but continues as normal
-Liquid::Environment.default.error_mode = :lax     # The default mode, accepts almost anything.
+Liquid::Template.error_mode = :strict # Raises a SyntaxError when invalid syntax is used
+Liquid::Template.error_mode = :warn # Adds strict errors to template.errors but continues as normal
+Liquid::Template.error_mode = :lax # The default mode, accepts almost anything.
 ```
 
 If you want to set the error mode only on specific templates you can pass `:error_mode` as an option to `parse`:
@@ -118,50 +76,6 @@ This is useful for doing things like enabling strict mode only in the theme edit
 It is recommended that you enable `:strict` or `:warn` mode on new apps to stop invalid templates from being created.
 It is also recommended that you use it in the template editors of existing apps to give editors better error messages.
 
-### Strict2 bindings and closures
-
-In `error_mode: :strict2`, `let` binds a value or defines a callable Liquid body:
-
-```liquid
-{% let count = 1 %}
-{% let title(step) %}
-  {% let count = count | plus: step %}
-  {{ count }}
-{% endlet %}
-{{ title(2) }}
-```
-
-Each call has fresh locals and writable parameters. Captures read the latest parent
-bindings. `set name = expression` updates the nearest local binding, or creates a
-shadow at the invocation root when the name is captured or absent. Initializers run
-before installing the new binding. Loops have fresh `let` bindings each iteration
-and can shadow outer names; conditional branches share their surrounding scope.
-Duplicate `let` declarations in one scope
-and `assign` inside closure bodies are parse errors. Calls accept positional
-arguments and invoke only Liquid closures.
-
-Custom `Liquid::Block` subclasses can use the same body rules:
-
-```ruby
-def parse(tokens)
-  @closure_body = parse_closure_body(tokens)
-end
-
-def render_to_output_buffer(context, output)
-  body = @closure_body.bind(context)
-  exports = body.invoke(context, output: output)
-  exports['title']&.render_to_output_buffer(context, output, ['Hello'])
-  output
-end
-```
-
-`invoke` renders into the supplied buffer and returns direct-child body-form `let`
-bindings by name. Value bindings and declarations nested in control flow are not
-exported. Each invocation has fresh state; bind the body at render time rather than
-caching a closure on the parsed tag. For parameterized bodies, pass
-`parameters: ['name']` to `parse_closure_body`, then pass an argument array as the
-second argument to `invoke`. The syntax remains visible to `ParseTreeVisitor`.
-
 ### Undefined variables and filters
 
 By default, the renderer doesn't raise or in any other way notify you if some variables or filters are missing, i.e. not passed to the `render` method.
@@ -197,4 +111,4 @@ template.render!({ 'x' => 1}, { strict_variables: true })
 
 To help track usages of a feature or code path in production, we have released opt-in usage tracking. To enable this, we provide an empty `Liquid:: Usage.increment` method which you can customize to your needs. The feature is well suited to https://github.com/Shopify/statsd-instrument. However, the choice of implementation is up to you.
 
-Once you have enabled usage tracking, we recommend reporting any events through Github Issues that your system may be logging. It is highly likely this event has been added to consider deprecating or improving code specific to this event, so please raise any concerns.
+Once you have enabled usage tracking, we recommend reporting any events through Github Issues that your system may be logging. It is highly likely this event has been added to consider deprecating or improving code specific to this event, so please raise any concerns.

Rakefile

@@ -33,7 +33,7 @@ task :rubocop do
   end
 end
 
-desc('runs test suite with lax, strict, and strict2 parsers')
+desc('runs test suite with both strict and lax parsers')
 task :test do
   ENV['LIQUID_PARSER_MODE'] = 'lax'
   Rake::Task['base_test'].invoke
@@ -42,11 +42,9 @@ task :test do
   Rake::Task['base_test'].reenable
   Rake::Task['base_test'].invoke
 
-  ENV['LIQUID_PARSER_MODE'] = 'strict2'
-  Rake::Task['base_test'].reenable
-  Rake::Task['base_test'].invoke
-
   if RUBY_ENGINE == 'ruby' || RUBY_ENGINE == 'truffleruby'
+    ENV['LIQUID_C'] = '1'
+
     ENV['LIQUID_PARSER_MODE'] = 'lax'
     Rake::Task['integration_test'].reenable
     Rake::Task['integration_test'].invoke
@@ -54,10 +52,6 @@ task :test do
     ENV['LIQUID_PARSER_MODE'] = 'strict'
     Rake::Task['integration_test'].reenable
     Rake::Task['integration_test'].invoke
-
-    ENV['LIQUID_PARSER_MODE'] = 'strict2'
-    Rake::Task['integration_test'].reenable
-    Rake::Task['integration_test'].invoke
   end
 end
 
@@ -79,7 +73,7 @@ end
 
 namespace :benchmark do
   desc "Run the liquid benchmark with lax parsing"
-  task :lax do
+  task :run do
     ruby "./performance/benchmark.rb lax"
   end
 
@@ -87,38 +81,6 @@ namespace :benchmark do
   task :strict do
     ruby "./performance/benchmark.rb strict"
   end
-
-  desc "Run the liquid benchmark with strict2 parsing"
-  task :strict2 do
-    ruby "./performance/benchmark.rb strict2"
-  end
-
-  desc "Run the liquid benchmark with lax, strict, and strict2 parsing"
-  task run: [:lax, :strict, :strict2]
-
-  desc "Run unit benchmarks"
-  namespace :unit do
-    task :all do
-      Dir["./performance/unit/*_benchmark.rb"].each do |file|
-        puts "🧪 Running #{file}"
-        ruby file
-      end
-    end
-
-    task :lexer do
-      Dir["./performance/unit/lexer_benchmark.rb"].each do |file|
-        puts "🧪 Running #{file}"
-        ruby file
-      end
-    end
-
-    task :expression do
-      Dir["./performance/unit/expression_benchmark.rb"].each do |file|
-        puts "🧪 Running #{file}"
-        ruby file
-      end
-    end
-  end
 end
 
 namespace :profile do
@@ -148,11 +110,3 @@ end
 task :console do
   exec 'irb -I lib -r liquid'
 end
-
-desc('run liquid-spec suite across all adapters')
-task :spec do
-  Dir['./spec/*.rb'].sort.each do |adapter|
-    puts "=== Running #{adapter} ==="
-    sh 'bundle', 'exec', 'liquid-spec', 'run', adapter, '--no-max-failures'
-  end
-end

bin/render

@@ -1,46 +0,0 @@
-#!/usr/bin/env ruby
-# frozen_string_literal: true
-
-require 'bundler/setup'
-require 'liquid'
-
-class VirtualFileSystem
-  def initialize
-    snippet_1 = <<~LIQUID
-      <h1>
-        {{- greating | default: 'Hello' }}, {{ name | default: 'world' -}}!
-      </h1>
-    LIQUID
-    snippet_2 = <<~LIQUID
-      {%- for i in (1..5) -%}
-        > {{ i }}
-      {%- endfor -%}
-    LIQUID
-
-    @templates = {
-      'snippet-1' => snippet_1,
-      'snippet-2' => snippet_2,
-    }
-  end
-
-  def read_template_file(key)
-    @templates[key] || raise(Liquid::FileSystemError, "No such template '#{key}'")
-  end
-end
-
-def source
-  File.read(ARGV[0])
-rescue StandardError
-  'Usage: bin/render example/server/templates/index.liquid'
-end
-
-def assigns
-  {
-    'date' => Time.now,
-  }
-end
-
-puts Liquid::Template
-  .parse(source, error_mode: :strict2)
-  .tap { |t| t.registers[:file_system] = VirtualFileSystem.new }
-  .render(assigns)

example/server/example_servlet.rb

@@ -30,18 +30,14 @@ class Servlet < LiquidServlet
   private
 
   def products_list
-    [
-      { 'name' => 'Arbor Draft', 'price' => 39900, 'description' => 'the *arbor draft* is a excellent product' },
-      { 'name' => 'Arbor Element', 'price' => 40000, 'description' => 'the *arbor element* rocks for freestyling' },
-      { 'name' => 'Arbor Diamond', 'price' => 59900, 'description' => 'the *arbor diamond* is a made up product because im obsessed with arbor and have no creativity' }
-    ]
+    [{ 'name' => 'Arbor Draft', 'price' => 39900, 'description' => 'the *arbor draft* is a excellent product' },
+     { 'name' => 'Arbor Element', 'price' => 40000, 'description' => 'the *arbor element* rocks for freestyling' },
+     { 'name' => 'Arbor Diamond', 'price' => 59900, 'description' => 'the *arbor diamond* is a made up product because im obsessed with arbor and have no creativity' }]
   end
 
   def more_products_list
-    [
-      { 'name' => 'Arbor Catalyst', 'price' => 39900, 'description' => 'the *arbor catalyst* is an advanced drop-through for freestyle and flatground performance and versatility' },
-      { 'name' => 'Arbor Fish', 'price' => 40000, 'description' => 'the *arbor fish* is a compact pin that features an extended wheelbase and time-honored teardrop shape' }
-    ]
+    [{ 'name' => 'Arbor Catalyst', 'price' => 39900, 'description' => 'the *arbor catalyst* is an advanced drop-through for freestyle and flatground performance and versatility' },
+     { 'name' => 'Arbor Fish', 'price' => 40000, 'description' => 'the *arbor fish* is a compact pin that features an extended wheelbase and time-honored teardrop shape' }]
   end
 
   def description

lib/liquid.rb

@@ -21,8 +21,6 @@
 # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
-require "strscan"
-
 module Liquid
   FilterSeparator             = /\|/
   ArgumentSeparator           = ','
@@ -43,48 +41,43 @@ module Liquid
   AnyStartingTag              = /#{TagStart}|#{VariableStart}/o
   PartialTemplateParser       = /#{TagStart}.*?#{TagEnd}|#{VariableStart}.*?#{VariableIncompleteEnd}/om
   TemplateParser              = /(#{PartialTemplateParser}|#{AnyStartingTag})/om
-  VariableParser              = /\[(?>[^\[\]]+|\g<0>)*\]|#{VariableSegment}+\??/o
+  VariableParser              = /\[[^\]]+\]|#{VariableSegment}+\??/o
 
   RAISE_EXCEPTION_LAMBDA = ->(_e) { raise }
-  HAS_STRING_SCANNER_SCAN_BYTE = StringScanner.instance_methods.include?(:scan_byte)
+
+  singleton_class.send(:attr_accessor, :cache_classes)
+  self.cache_classes = true
 end
 
 require "liquid/version"
-require "liquid/deprecations"
-require "liquid/const"
-require 'liquid/standardfilters'
-require 'liquid/file_system'
-require 'liquid/parser_switching'
-require 'liquid/tag'
-require 'liquid/block'
 require 'liquid/parse_tree_visitor'
-require 'liquid/closure_body'
-require 'liquid/closure'
-require 'liquid/call_expression'
-require 'liquid/interrupts'
-require 'liquid/tags'
-require "liquid/environment"
 require 'liquid/lexer'
 require 'liquid/parser'
 require 'liquid/i18n'
 require 'liquid/drop'
-require 'liquid/self_drop'
 require 'liquid/tablerowloop_drop'
 require 'liquid/forloop_drop'
 require 'liquid/extensions'
 require 'liquid/errors'
 require 'liquid/interrupts'
 require 'liquid/strainer_template'
+require 'liquid/strainer_factory'
+require 'liquid/expression'
 require 'liquid/context'
+require 'liquid/parser_switching'
 require 'liquid/tag'
+require 'liquid/tag/disabler'
+require 'liquid/tag/disableable'
+require 'liquid/block'
 require 'liquid/block_body'
 require 'liquid/document'
 require 'liquid/variable'
 require 'liquid/variable_lookup'
 require 'liquid/range_lookup'
+require 'liquid/file_system'
 require 'liquid/resource_limits'
-require 'liquid/expression'
 require 'liquid/template'
+require 'liquid/standardfilters'
 require 'liquid/condition'
 require 'liquid/utils'
 require 'liquid/tokenizer'
@@ -93,3 +86,7 @@ require 'liquid/partial_cache'
 require 'liquid/usage'
 require 'liquid/registers'
 require 'liquid/template_factory'
+
+# Load all the tags of the standard library
+#
+Dir["#{__dir__}/liquid/tags/*.rb"].each { |f| require f }

lib/liquid/block.rb

@@ -10,13 +10,10 @@ module Liquid
     end
 
     def parse(tokens)
-      parse_block_body(tokens)
-    end
-
-    # Parse an external block body with closure validation and lexical declarations.
-    def parse_closure_body(tokens, parameters: Const::EMPTY_ARRAY)
-      parse_context.with_closure(parameters) { parse_block_body(tokens) }
-      ClosureBody.new(@body, parameters)
+      @body = new_body
+      while parse_body(@body, tokens)
+      end
+      @body.freeze
     end
 
     # For backwards compatibility
@@ -39,17 +36,13 @@ module Liquid
     # @api private
     def self.raise_unknown_tag(tag, block_name, block_delimiter, parse_context)
       if tag == 'else'
-        raise SyntaxError, parse_context.locale.t(
-          "errors.syntax.unexpected_else",
-          block_name: block_name,
-        )
+        raise SyntaxError, parse_context.locale.t("errors.syntax.unexpected_else",
+          block_name: block_name)
       elsif tag.start_with?('end')
-        raise SyntaxError, parse_context.locale.t(
-          "errors.syntax.invalid_delimiter",
+        raise SyntaxError, parse_context.locale.t("errors.syntax.invalid_delimiter",
           tag: tag,
           block_name: block_name,
-          block_delimiter: block_delimiter,
-        )
+          block_delimiter: block_delimiter)
       else
         raise SyntaxError, parse_context.locale.t("errors.syntax.unknown_tag", tag: tag)
       end
@@ -69,13 +62,6 @@ module Liquid
 
     private
 
-    def parse_block_body(tokens)
-      @body = new_body
-      while parse_body(@body, tokens)
-      end
-      @body.freeze
-    end
-
     # @api public
     def new_body
       parse_context.new_block_body

lib/liquid/block_body.rb

@@ -6,7 +6,6 @@ module Liquid
   class BlockBody
     LiquidTagToken      = /\A\s*(#{TagName})\s*(.*?)\z/o
     FullToken           = /\A#{TagStart}#{WhitespaceControl}?(\s*)(#{TagName})(\s*)(.*?)#{WhitespaceControl}?#{TagEnd}\z/om
-    FullTokenPossiblyInvalid = /\A(.*)#{TagStart}#{WhitespaceControl}?\s*(\w+)\s*(.*)?#{WhitespaceControl}?#{TagEnd}\z/om
     ContentOfVariable   = /\A#{VariableStart}#{WhitespaceControl}?(.*?)#{WhitespaceControl}?#{VariableEnd}\z/om
     WhitespaceOrNothing = /\A\s*\z/
     TAGSTART            = "{%"
@@ -46,13 +45,7 @@ module Liquid
           end
           tag_name = Regexp.last_match(1)
           markup   = Regexp.last_match(2)
-
-          if tag_name == 'liquid'
-            parse_context.line_number -= 1
-            next parse_liquid_tag(markup, parse_context)
-          end
-
-          unless (tag = parse_context.environment.tag_for_name(tag_name))
+          unless (tag = registered_tags[tag_name])
             # end parsing if we reach an unknown tag and let the caller decide
             # determine how to proceed
             return yield tag_name, markup
@@ -99,9 +92,7 @@ module Liquid
         context.handle_error(exc, line_number)
       else
         error_message = context.handle_error(exc, line_number)
-        error_mode = context.registers.static[:template_error_mode]
-        suppress_error_text = blank_tag && error_mode != :strict2 && error_mode != :rigid
-        unless suppress_error_text # blank-tag suppression is kept for backwards compatibility outside strict2
+        unless blank_tag # conditional for backwards compatibility
           output << error_message
         end
       end
@@ -149,7 +140,7 @@ module Liquid
             next
           end
 
-          unless (tag = parse_context.environment.tag_for_name(tag_name))
+          unless (tag = registered_tags[tag_name])
             # end parsing if we reach an unknown tag and let the caller decide
             # determine how to proceed
             return yield tag_name, markup
@@ -248,17 +239,10 @@ module Liquid
     end
 
     def create_variable(token, parse_context)
-      if token.end_with?("}}")
-        i = 2
-        i = 3 if token[i] == "-"
-        parse_end = token.length - 3
-        parse_end -= 1 if token[parse_end] == "-"
-        markup_end = parse_end - i + 1
-        markup = markup_end <= 0 ? "" : token.slice(i, markup_end)
-
+      if token =~ ContentOfVariable
+        markup = Regexp.last_match(1)
         return Variable.new(markup, parse_context)
       end
-
       BlockBody.raise_missing_variable_terminator(token, parse_context)
     end
 
@@ -271,5 +255,9 @@ module Liquid
     def raise_missing_variable_terminator(token, parse_context)
       BlockBody.raise_missing_variable_terminator(token, parse_context)
     end
+
+    def registered_tags
+      Template.tags
+    end
   end
 end

lib/liquid/call_expression.rb

@@ -1,33 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  class CallExpression
-    attr_reader :target, :arguments
-
-    def initialize(target, arguments)
-      @target = target.freeze
-      @arguments = arguments.freeze
-      freeze
-    end
-
-    def evaluate(context)
-      context.resource_limits.with_capture do
-        render_to_output_buffer(context, +'')
-      end
-    end
-
-    def render_to_output_buffer(context, output)
-      closure = context.evaluate(@target)
-      raise Liquid::ArgumentError, "Expected a Liquid closure" unless closure.is_a?(Closure)
-
-      arguments = @arguments.map { |argument| context.evaluate(argument) }
-      closure.render_to_output_buffer(context, output, arguments)
-    end
-
-    class ParseTreeVisitor < Liquid::ParseTreeVisitor
-      def children
-        [@node.target] + @node.arguments
-      end
-    end
-  end
-end

lib/liquid/closure.rb

@@ -1,96 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  # A render-time value. Captures retain binding hashes, not copies of their values.
-  class Closure
-    def initialize(body, parameters, context)
-      @body = body
-      @parameters = parameters
-      @scopes = context.scopes.dup
-      @environments = context.environments.dup
-      @static_environments = context.static_environments
-    end
-
-    # Render into the supplied buffer and return direct-child body-form let bindings.
-    def invoke(context, arguments = Const::EMPTY_ARRAY, output: +'')
-      invocation = render_invocation(context, arguments, output)
-      @body.exports(invocation)
-    end
-
-    def render_to_output_buffer(context, output, arguments = Const::EMPTY_ARRAY)
-      render_invocation(context, arguments, output)
-      output
-    end
-
-    def to_liquid
-      self
-    end
-
-    def to_s
-      ''
-    end
-
-    private
-
-    def render_invocation(context, arguments, output)
-      unless arguments.length == @parameters.length
-        raise Liquid::ArgumentError, "Expected #{@parameters.length} closure arguments, got #{arguments.length}"
-      end
-
-      invocation = context.new_closure_subcontext(@scopes, @environments, @static_environments)
-      @parameters.each_with_index { |name, index| invocation[name] = arguments[index] }
-      @body.render_to_output_buffer(invocation, output)
-      invocation
-    end
-
-    # @api private
-    class CapturedBindings
-      def initialize(scopes, environments, context)
-        @scopes = scopes
-        @environments = environments
-        @context = context
-        @locals = {}
-      end
-
-      def key?(name)
-        local_key?(name) || @environments.any? { |environment| environment.key?(name) }
-      end
-
-      def local_key?(name)
-        @locals.key?(name) || @scopes.any? { |scope| scope.key?(name) } ||
-          @environments.any? { |environment| environment.is_a?(CapturedBindings) && environment.local_key?(name) }
-      end
-
-      def []=(name, value)
-        @locals[name] = value
-      end
-
-      def [](name)
-        find_variable(name, @context, raise_on_not_found: false)
-      end
-
-      def find_variable(name, context, raise_on_not_found: true)
-        return context.lookup_and_evaluate(@locals, name, raise_on_not_found: raise_on_not_found) if @locals.key?(name)
-
-        scope = @scopes.find { |candidate| candidate.key?(name) }
-        return context.lookup_and_evaluate(scope, name, raise_on_not_found: raise_on_not_found) if scope
-
-        find_in_environments(name, context, raise_on_not_found: raise_on_not_found)
-      end
-
-      private
-
-      def find_in_environments(name, context, raise_on_not_found:)
-        @environments.each do |environment|
-          if environment.is_a?(CapturedBindings)
-            return environment.find_variable(name, context, raise_on_not_found: raise_on_not_found)
-          end
-
-          value = context.lookup_and_evaluate(environment, name, raise_on_not_found: raise_on_not_found)
-          return value if !value.nil? || context.strict_variables && raise_on_not_found
-        end
-        nil
-      end
-    end
-  end
-end

lib/liquid/closure_body.rb

@@ -1,31 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  # Parsed syntax shared by let and closure-aware custom blocks.
-  class ClosureBody
-    attr_reader :body
-
-    def initialize(body, parameters = Const::EMPTY_ARRAY)
-      @body = body
-      @parameters = parameters.dup.freeze
-      @exports = body.nodelist.select { |node| node.is_a?(Let) && node.body_form? }.map(&:to).freeze
-      freeze
-    end
-
-    def bind(context)
-      Closure.new(self, @parameters, context)
-    end
-
-    def render_to_output_buffer(context, output)
-      @body.render_to_output_buffer(context, output)
-    end
-
-    def exports(context)
-      context.scopes.last.slice(*@exports)
-    end
-
-    def nodelist
-      @body.nodelist
-    end
-  end
-end

lib/liquid/condition.rb

@@ -24,9 +24,6 @@ module Liquid
         else
           false
         end
-      rescue Encoding::CompatibilityError
-        # "✅".b.include?("✅") raises Encoding::CompatibilityError despite being materially equal
-        left.b.include?(right.b)
       end,
     }
 
@@ -48,8 +45,8 @@ module Liquid
       @@operators
     end
 
-    def self.parse_expression(parse_context, markup, safe: false)
-      @@method_literals[markup] || parse_context.parse_expression(markup, safe: safe)
+    def self.parse_expression(parse_context, markup)
+      @@method_literals[markup] || parse_context.parse_expression(markup)
     end
 
     attr_reader :attachment, :child_condition
@@ -72,9 +69,9 @@ module Liquid
 
         case condition.child_relation
         when :or
-          break if Liquid::Utils.to_liquid_value(result)
+          break if result
         when :and
-          break unless Liquid::Utils.to_liquid_value(result)
+          break unless result
         else
           break
         end
@@ -113,67 +110,24 @@ module Liquid
 
     def equal_variables(left, right)
       if left.is_a?(MethodLiteral)
-        return call_method_literal(left, right)
+        if right.respond_to?(left.method_name)
+          return right.send(left.method_name)
+        else
+          return nil
+        end
       end
 
       if right.is_a?(MethodLiteral)
-        return call_method_literal(right, left)
+        if left.respond_to?(right.method_name)
+          return left.send(right.method_name)
+        else
+          return nil
+        end
       end
 
       left == right
     end
 
-    def call_method_literal(literal, value)
-      method_name = literal.method_name
-
-      # If the object responds to the method (e.g., ActiveSupport is loaded), use it
-      if value.respond_to?(method_name)
-        value.send(method_name)
-      else
-        # Emulate ActiveSupport's blank?/empty? to make Liquid invariant
-        # to whether ActiveSupport is loaded or not
-        case method_name
-        when :blank?
-          liquid_blank?(value)
-        when :empty?
-          liquid_empty?(value)
-        else
-          false
-        end
-      end
-    end
-
-    # Implement blank? semantics matching ActiveSupport
-    # blank? returns true for nil, false, empty strings, whitespace-only strings,
-    # empty arrays, and empty hashes
-    def liquid_blank?(value)
-      case value
-      when NilClass, FalseClass
-        true
-      when TrueClass, Numeric
-        false
-      when String
-        # Blank if empty or whitespace only (matches ActiveSupport)
-        value.empty? || value.match?(/\A\s*\z/)
-      when Array, Hash
-        value.empty?
-      else
-        # Fall back to empty? if available, otherwise false
-        value.respond_to?(:empty?) ? value.empty? : false
-      end
-    end
-
-    # Implement empty? semantics
-    # Note: nil is NOT empty. empty? checks if a collection has zero elements.
-    def liquid_empty?(value)
-      case value
-      when String, Array, Hash
-        value.empty?
-      else
-        value.respond_to?(:empty?) ? value.empty? : false
-      end
-    end
-
     def interpret_condition(left, right, op, context)
       # If the operator is empty this means that the decision statement is just
       # a single variable. We can just poll this variable from the context and
@@ -197,18 +151,16 @@ module Liquid
     end
 
     def deprecated_default_context
-      warn("DEPRECATION WARNING: Condition#evaluate without a context argument is deprecated " \
-        "and will be removed from Liquid 6.0.0.")
+      warn("DEPRECATION WARNING: Condition#evaluate without a context argument is deprecated" \
+        " and will be removed from Liquid 6.0.0.")
       Context.new
     end
 
     class ParseTreeVisitor < Liquid::ParseTreeVisitor
       def children
         [
-          @node.left,
-          @node.right,
-          @node.child_condition,
-          @node.attachment
+          @node.left, @node.right,
+          @node.child_condition, @node.attachment
         ].compact
       end
     end

lib/liquid/const.rb

@@ -1,8 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  module Const
-    EMPTY_HASH = {}.freeze
-    EMPTY_ARRAY = [].freeze
-  end
-end

lib/liquid/context.rb

@@ -15,40 +15,35 @@ module Liquid
   #   context['bob']  #=> nil  class Context
   class Context
     attr_reader :scopes, :errors, :registers, :environments, :resource_limits, :static_registers, :static_environments
-    attr_accessor :exception_renderer, :template_name, :partial, :global_filter, :strict_variables, :strict_filters, :environment
+    attr_accessor :exception_renderer, :template_name, :partial, :global_filter, :strict_variables, :strict_filters
 
     # rubocop:disable Metrics/ParameterLists
-    def self.build(environment: Environment.default, environments: {}, outer_scope: {}, registers: {}, rethrow_errors: false, resource_limits: nil, static_environments: {}, &block)
-      new(environments, outer_scope, registers, rethrow_errors, resource_limits, static_environments, environment, &block)
+    def self.build(environments: {}, outer_scope: {}, registers: {}, rethrow_errors: false, resource_limits: nil, static_environments: {}, &block)
+      new(environments, outer_scope, registers, rethrow_errors, resource_limits, static_environments, &block)
     end
 
-    def initialize(environments = {}, outer_scope = {}, registers = {}, rethrow_errors = false, resource_limits = nil, static_environments = {}, environment = Environment.default)
-      @environment = environment
+    def initialize(environments = {}, outer_scope = {}, registers = {}, rethrow_errors = false, resource_limits = nil, static_environments = {})
       @environments = [environments]
       @environments.flatten!
 
       @static_environments = [static_environments].flatten(1).freeze
-      @scopes              = [outer_scope || {}]
+      @scopes              = [(outer_scope || {})]
       @registers           = registers.is_a?(Registers) ? registers : Registers.new(registers)
       @errors              = []
       @partial             = false
       @strict_variables    = false
-      @resource_limits     = resource_limits || ResourceLimits.new(environment.default_resource_limits)
+      @resource_limits     = resource_limits || ResourceLimits.new(Template.default_resource_limits)
       @base_scope_depth    = 0
       @interrupts          = []
       @filters             = []
       @global_filter       = nil
       @disabled_tags       = {}
 
-      # Instead of constructing new StringScanner objects for each Expression parse,
-      # we recycle the same one.
-      @string_scanner = StringScanner.new("")
-
       @registers.static[:cached_partials] ||= {}
-      @registers.static[:file_system] ||= environment.file_system
+      @registers.static[:file_system] ||= Liquid::Template.file_system
       @registers.static[:template_factory] ||= Liquid::TemplateFactory.new
 
-      self.exception_renderer = environment.exception_renderer
+      self.exception_renderer = Template.default_exception_renderer
       if rethrow_errors
         self.exception_renderer = Liquid::RAISE_EXCEPTION_LAMBDA
       end
@@ -65,7 +60,7 @@ module Liquid
     end
 
     def strainer
-      @strainer ||= @environment.create_strainer(self, @filters)
+      @strainer ||= StrainerFactory.create(self, @filters)
     end
 
     # Adds filters to this context.
@@ -147,10 +142,9 @@ module Liquid
       check_overflow
 
       self.class.build(
-        environment: @environment,
         resource_limits: resource_limits,
         static_environments: static_environments,
-        registers: Registers.new(registers),
+        registers: Registers.new(registers)
       ).tap do |subcontext|
         subcontext.base_scope_depth   = base_scope_depth + 1
         subcontext.exception_renderer = exception_renderer
@@ -162,40 +156,6 @@ module Liquid
       end
     end
 
-    # @api private
-    def new_closure_subcontext(scopes, environments, static_environments)
-      new_isolated_subcontext.tap do |invocation|
-        captures = Closure::CapturedBindings.new(scopes, environments + static_environments, invocation)
-        invocation.captured_bindings = captures
-        invocation.environments = [captures]
-        invocation.static_environments = static_environments
-        invocation.strict_variables = strict_variables
-        invocation.strict_filters = strict_filters
-        invocation.global_filter = global_filter
-        invocation.template_name = template_name
-        invocation.partial = partial
-        invocation.base_scope_depth = base_scope_depth + @scopes.length
-      end
-    end
-
-    # @api private
-    def with_binding_scope
-      previous_root = @binding_root
-      stack do
-        @binding_root = @scopes.first
-        yield
-      end
-    ensure
-      @binding_root = previous_root
-    end
-
-    # @api private
-    def set_local(name, value)
-      root = @binding_root || @scopes.last
-      scope = @scopes.find { |owned| owned.key?(name) || owned.equal?(root) }
-      scope[name] = value
-    end
-
     def clear_instance_assigns
       @scopes[0] = {}
     end
@@ -214,20 +174,11 @@ module Liquid
     # Example:
     #   products == empty #=> products.empty?
     def [](expression)
-      evaluate(Expression.parse(expression, @string_scanner))
+      evaluate(Expression.parse(expression))
     end
 
     def key?(key)
-      find_variable(key, raise_on_not_found: false) != nil
-    end
-
-    # Checks whether a variable is defined in any scope, including nil-valued keys.
-    # Unlike #key?, this uses Hash#key? so that variables explicitly set to nil
-    # are still considered defined.
-    def variable_defined?(key)
-      @scopes.any? { |s| s.key?(key) } ||
-        @environments.any? { |e| e.key?(key) } ||
-        @static_environments.any? { |e| e.key?(key) }
+      self[key] != nil
     end
 
     def evaluate(object)
@@ -240,29 +191,16 @@ module Liquid
       # path and find_index() is optimized in MRI to reduce object allocation
       index = @scopes.find_index { |s| s.key?(key) }
 
-      fallback_to_self_drop = key == Expression::SELF && index.nil? && !@captured_bindings&.local_key?(key)
-
       variable = if index
         lookup_and_evaluate(@scopes[index], key, raise_on_not_found: raise_on_not_found)
       else
-        try_variable_find_in_environments(
-          key,
-          raise_on_not_found: raise_on_not_found && !fallback_to_self_drop,
-        )
+        try_variable_find_in_environments(key, raise_on_not_found: raise_on_not_found)
       end
 
-      # `self` resolves to a SelfDrop (enabling `self['var']` lookups),
-      # but only after the normal environment lookup doesn't find a value.
-      return @self_drop ||= SelfDrop.new(self) if fallback_to_self_drop && variable.nil?
-
-      # update variable's context before invoking #to_liquid
+      variable         = variable.to_liquid
       variable.context = self if variable.respond_to?(:context=)
 
-      liquid_variable = variable.to_liquid
-
-      liquid_variable.context = self if variable != liquid_variable && liquid_variable.respond_to?(:context=)
-
-      liquid_variable
+      variable
     end
 
     def lookup_and_evaluate(obj, key, raise_on_not_found: true)
@@ -296,17 +234,13 @@ module Liquid
 
     protected
 
-    attr_writer :base_scope_depth, :warnings, :errors, :strainer, :filters, :disabled_tags, :environments, :static_environments, :captured_bindings
+    attr_writer :base_scope_depth, :warnings, :errors, :strainer, :filters, :disabled_tags
 
     private
 
     attr_reader :base_scope_depth
 
     def try_variable_find_in_environments(key, raise_on_not_found:)
-      if @captured_bindings
-        return @captured_bindings.find_variable(key, self, raise_on_not_found: raise_on_not_found)
-      end
-
       @environments.each do |environment|
         found_variable = lookup_and_evaluate(environment, key, raise_on_not_found: raise_on_not_found)
         if !found_variable.nil? || @strict_variables && raise_on_not_found

lib/liquid/deprecations.rb

@@ -1,22 +0,0 @@
-# frozen_string_literal: true
-
-require "set"
-
-module Liquid
-  class Deprecations
-    class << self
-      attr_accessor :warned
-
-      Deprecations.warned = Set.new
-
-      def warn(name, alternative)
-        return if warned.include?(name)
-
-        warned << name
-
-        caller_location = caller_locations(2, 1).first
-        Warning.warn("[DEPRECATION] #{name} is deprecated. Use #{alternative} instead. Called from #{caller_location}\n")
-      end
-    end
-  end
-end

lib/liquid/document.rb

@@ -20,9 +20,7 @@ module Liquid
     end
 
     def parse(tokenizer, parse_context)
-      @local_bindings = parse_context.with_document_scope do
-        while parse_body(tokenizer)
-        end
+      while parse_body(tokenizer)
       end
       @body.freeze
     rescue SyntaxError => e
@@ -40,9 +38,7 @@ module Liquid
     end
 
     def render_to_output_buffer(context, output)
-      return @body.render_to_output_buffer(context, output) unless @local_bindings
-
-      context.with_binding_scope { @body.render_to_output_buffer(context, output) }
+      @body.render_to_output_buffer(context, output)
     end
 
     def render(context)

lib/liquid/drop.rb

@@ -31,7 +31,7 @@ module Liquid
 
     # Catch all for the method
     def liquid_method_missing(method)
-      return unless @context&.strict_variables
+      return nil unless @context&.strict_variables
       raise Liquid::UndefinedDropMethod, "undefined method #{method}"
     end
 

lib/liquid/environment.rb

@@ -1,159 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  # The Environment is the container for all configuration options of Liquid, such as
-  # the registered tags, filters, and the default error mode.
-  class Environment
-    # The default error mode for all templates. This can be overridden on a
-    # per-template basis.
-    attr_accessor :error_mode
-
-    # The tags that are available to use in the template.
-    attr_accessor :tags
-
-    # The strainer template which is used to store filters that are available to
-    # use in templates.
-    attr_accessor :strainer_template
-
-    # The exception renderer that is used to render exceptions that are raised
-    # when rendering a template
-    attr_accessor :exception_renderer
-
-    # The default file system that is used to load templates from.
-    attr_accessor :file_system
-
-    # The default resource limits that are used to limit the resources that a
-    # template can consume.
-    attr_accessor :default_resource_limits
-
-    class << self
-      # Creates a new environment instance.
-      #
-      # @param tags [Hash] The tags that are available to use in
-      #  the template.
-      # @param file_system The default file system that is used
-      #  to load templates from.
-      # @param error_mode [Symbol] The default error mode for all templates
-      #  (either :strict2, :strict, :warn, or :lax).
-      # @param exception_renderer [Proc] The exception renderer that is used to
-      #   render exceptions.
-      # @yieldparam environment [Environment] The environment instance that is being built.
-      # @return [Environment] The new environment instance.
-      def build(tags: nil, file_system: nil, error_mode: nil, exception_renderer: nil)
-        ret = new
-        ret.tags = tags if tags
-        ret.file_system = file_system if file_system
-        ret.error_mode = error_mode if error_mode
-        ret.exception_renderer = exception_renderer if exception_renderer
-        yield ret if block_given?
-        ret.freeze
-      end
-
-      # Returns the default environment instance.
-      #
-      # @return [Environment] The default environment instance.
-      def default
-        @default ||= new
-      end
-
-      # Sets the default environment instance for the duration of the block
-      #
-      # @param environment [Environment] The environment instance to use as the default for the
-      #   duration of the block.
-      # @yield
-      # @return [Object] The return value of the block.
-      def dangerously_override(environment)
-        original_default = @default
-        @default = environment
-        yield
-      ensure
-        @default = original_default
-      end
-    end
-
-    # Initializes a new environment instance.
-    # @api private
-    def initialize
-      @tags = Tags::STANDARD_TAGS.dup
-      @error_mode = :lax
-      @strainer_template = Class.new(StrainerTemplate).tap do |klass|
-        klass.add_filter(StandardFilters)
-      end
-      @exception_renderer = ->(exception) { exception }
-      @file_system = BlankFileSystem.new
-      @default_resource_limits = Const::EMPTY_HASH
-      @strainer_template_class_cache = {}
-    end
-
-    # Registers a new tag with the environment.
-    #
-    # @param name [String] The name of the tag.
-    # @param klass [Liquid::Tag] The class that implements the tag.
-    # @return [void]
-    def register_tag(name, klass)
-      @tags[name] = klass
-    end
-
-    # Registers a new filter with the environment.
-    #
-    # @param filter [Module] The module that contains the filter methods.
-    # @return [void]
-    def register_filter(filter)
-      @strainer_template_class_cache.clear
-      @strainer_template.add_filter(filter)
-    end
-
-    # Registers multiple filters with this environment.
-    #
-    # @param filters [Array<Module>] The modules that contain the filter methods.
-    # @return [self]
-    def register_filters(filters)
-      @strainer_template_class_cache.clear
-      filters.each { |f| @strainer_template.add_filter(f) }
-      self
-    end
-
-    # Creates a new strainer instance with the given filters, caching the result
-    # for faster lookup.
-    #
-    # @param context [Liquid::Context] The context that the strainer will be
-    #   used in.
-    # @param filters [Array<Module>] The filters that the strainer will have
-    #   access to.
-    # @return [Liquid::Strainer] The new strainer instance.
-    def create_strainer(context, filters = Const::EMPTY_ARRAY)
-      return @strainer_template.new(context) if filters.empty?
-
-      strainer_template = @strainer_template_class_cache[filters] ||= begin
-        klass = Class.new(@strainer_template)
-        filters.each { |f| klass.add_filter(f) }
-        klass
-      end
-
-      strainer_template.new(context)
-    end
-
-    # Returns the names of all the filter methods that are available to use in
-    # the strainer template.
-    #
-    # @return [Array<String>] The names of all the filter methods.
-    def filter_method_names
-      @strainer_template.filter_method_names
-    end
-
-    # Returns the tag class for the given tag name.
-    #
-    # @param name [String] The name of the tag.
-    # @return [Liquid::Tag] The tag class.
-    def tag_for_name(name)
-      @tags[name]
-    end
-
-    def freeze
-      @tags.freeze
-      # TODO: freeze the tags, currently this is not possible because of liquid-c
-      # @strainer_template.freeze
-      super
-    end
-  end
-end

lib/liquid/errors.rb

@@ -40,20 +40,19 @@ module Liquid
     end
   end
 
-  ArgumentError         = Class.new(Error)
-  ContextError          = Class.new(Error)
-  FileSystemError       = Class.new(Error)
-  StandardError         = Class.new(Error)
-  SyntaxError           = Class.new(Error)
-  StackLevelError       = Class.new(Error)
-  MemoryError           = Class.new(Error)
-  ZeroDivisionError     = Class.new(Error)
-  FloatDomainError      = Class.new(Error)
-  UndefinedVariable     = Class.new(Error)
-  UndefinedDropMethod   = Class.new(Error)
-  UndefinedFilter       = Class.new(Error)
-  MethodOverrideError   = Class.new(Error)
-  DisabledError         = Class.new(Error)
-  InternalError         = Class.new(Error)
-  TemplateEncodingError = Class.new(Error)
+  ArgumentError       = Class.new(Error)
+  ContextError        = Class.new(Error)
+  FileSystemError     = Class.new(Error)
+  StandardError       = Class.new(Error)
+  SyntaxError         = Class.new(Error)
+  StackLevelError     = Class.new(Error)
+  MemoryError         = Class.new(Error)
+  ZeroDivisionError   = Class.new(Error)
+  FloatDomainError    = Class.new(Error)
+  UndefinedVariable   = Class.new(Error)
+  UndefinedDropMethod = Class.new(Error)
+  UndefinedFilter     = Class.new(Error)
+  MethodOverrideError = Class.new(Error)
+  DisabledError       = Class.new(Error)
+  InternalError       = Class.new(Error)
 end

lib/liquid/expression.rb

@@ -2,128 +2,42 @@
 
 module Liquid
   class Expression
-    SELF = 'self'
-
     LITERALS = {
-      nil => nil,
-      'nil' => nil,
-      'null' => nil,
-      '' => nil,
+      nil => nil, 'nil' => nil, 'null' => nil, '' => nil,
       'true' => true,
       'false' => false,
       'blank' => '',
-      'empty' => '',
-      # in lax mode, minus sign can be a VariableLookup
-      # For simplicity and performace, we treat it like a literal
-      '-' => VariableLookup.parse("-", nil).freeze,
+      'empty' => ''
     }.freeze
 
-    DOT = ".".ord
-    ZERO = "0".ord
-    NINE = "9".ord
-    DASH = "-".ord
+    INTEGERS_REGEX       = /\A(-?\d+)\z/
+    FLOATS_REGEX         = /\A(-?\d[\d\.]+)\z/
 
     # Use an atomic group (?>...) to avoid pathological backtracing from
     # malicious input as described in https://github.com/Shopify/liquid/issues/1357
-    RANGES_REGEX = /\A\(\s*(?>(\S+)\s*\.\.)\s*(\S+)\s*\)\z/
-    INTEGER_REGEX = /\A(-?\d+)\z/
-    FLOAT_REGEX = /\A(-?\d+)\.\d+\z/
+    RANGES_REGEX         = /\A\(\s*(?>(\S+)\s*\.\.)\s*(\S+)\s*\)\z/
 
-    class << self
-      def safe_parse(parser, ss = StringScanner.new(""), cache = nil)
-        parse(parser.expression, ss, cache)
+    def self.parse(markup)
+      return nil unless markup
+
+      markup = markup.strip
+      if (markup.start_with?('"') && markup.end_with?('"')) ||
+         (markup.start_with?("'") && markup.end_with?("'"))
+        return markup[1..-2]
       end
 
-      def parse(markup, ss = StringScanner.new(""), cache = nil)
-        return unless markup
-        return markup unless markup.is_a?(String)
-
-        markup = markup.strip # markup can be a frozen string
-
-        if (markup.start_with?('"') && markup.end_with?('"')) ||
-          (markup.start_with?("'") && markup.end_with?("'"))
-          return markup[1..-2]
-        elsif LITERALS.key?(markup)
-          return LITERALS[markup]
-        end
-
-        # Cache only exists during parsing
-        if cache
-          return cache[markup] if cache.key?(markup)
-
-          cache[markup] = inner_parse(markup, ss, cache).freeze
+      case markup
+      when INTEGERS_REGEX
+        Regexp.last_match(1).to_i
+      when RANGES_REGEX
+        RangeLookup.parse(Regexp.last_match(1), Regexp.last_match(2))
+      when FLOATS_REGEX
+        Regexp.last_match(1).to_f
+      else
+        if LITERALS.key?(markup)
+          LITERALS[markup]
         else
-          inner_parse(markup, ss, nil).freeze
-        end
-      end
-
-      def inner_parse(markup, ss, cache)
-        if markup.start_with?("(") && markup.end_with?(")") && markup =~ RANGES_REGEX
-          return RangeLookup.parse(
-            Regexp.last_match(1),
-            Regexp.last_match(2),
-            ss,
-            cache,
-          )
-        end
-
-        if (num = parse_number(markup, ss))
-          num
-        else
-          VariableLookup.parse(markup, ss, cache)
-        end
-      end
-
-      def parse_number(markup, ss)
-        # check if the markup is simple integer or float
-        case markup
-        when INTEGER_REGEX
-          return Integer(markup, 10)
-        when FLOAT_REGEX
-          return markup.to_f
-        end
-
-        ss.string = markup
-        # the first byte must be a digit or  a dash
-        byte = ss.scan_byte
-
-        return false if byte != DASH && (byte < ZERO || byte > NINE)
-
-        if byte == DASH
-          peek_byte = ss.peek_byte
-
-          # if it starts with a dash, the next byte must be a digit
-          return false if peek_byte.nil? || !(peek_byte >= ZERO && peek_byte <= NINE)
-        end
-
-        # The markup could be a float with multiple dots
-        first_dot_pos = nil
-        num_end_pos = nil
-
-        while (byte = ss.scan_byte)
-          return false if byte != DOT && (byte < ZERO || byte > NINE)
-
-          # we found our number and now we are just scanning the rest of the string
-          next if num_end_pos
-
-          if byte == DOT
-            if first_dot_pos.nil?
-              first_dot_pos = ss.pos
-            else
-              # we found another dot, so we know that the number ends here
-              num_end_pos = ss.pos - 1
-            end
-          end
-        end
-
-        num_end_pos = markup.length if ss.eos?
-
-        if num_end_pos
-          # number ends with a number "123.123"
-          markup.byteslice(0, num_end_pos).to_f
-        else
-          # number ends with a dot "123."
-          markup.byteslice(0, first_dot_pos).to_f
+          VariableLookup.parse(markup)
         end
       end
     end

lib/liquid/forloop_drop.rb

@@ -5,7 +5,7 @@ module Liquid
   # @liquid_type object
   # @liquid_name forloop
   # @liquid_summary
-  #   Information about a parent [`for` loop](/docs/api/liquid/tags/for).
+  #   Information about a parent [`for` loop](/api/liquid/tags/for).
   class ForloopDrop < Drop
     def initialize(name, length, parentloop)
       @name       = name

lib/liquid/i18n.rb

@@ -28,7 +28,7 @@ module Liquid
     def interpolate(name, vars)
       name.gsub(/%\{(\w+)\}/) do
         # raise TranslationError, "Undefined key #{$1} for interpolation in translation #{name}"  unless vars[$1.to_sym]
-        vars[Regexp.last_match(1).to_sym].to_s
+        (vars[Regexp.last_match(1).to_sym]).to_s
       end
     end
 

lib/liquid/lexer.rb

@@ -1,182 +1,61 @@
 # frozen_string_literal: true
 
+require "strscan"
 module Liquid
   class Lexer
-    ASSIGN = [:assign, "="].freeze
-    CLOSE_ROUND = [:close_round, ")"].freeze
-    CLOSE_SQUARE = [:close_square, "]"].freeze
-    COLON = [:colon, ":"].freeze
-    COMMA = [:comma, ","].freeze
-    COMPARISION_NOT_EQUAL = [:comparison, "!="].freeze
-    COMPARISON_CONTAINS = [:comparison, "contains"].freeze
-    COMPARISON_EQUAL = [:comparison, "=="].freeze
-    COMPARISON_GREATER_THAN = [:comparison, ">"].freeze
-    COMPARISON_GREATER_THAN_OR_EQUAL = [:comparison, ">="].freeze
-    COMPARISON_LESS_THAN = [:comparison, "<"].freeze
-    COMPARISON_LESS_THAN_OR_EQUAL = [:comparison, "<="].freeze
-    COMPARISON_NOT_EQUAL_ALT = [:comparison, "<>"].freeze
-    DASH = [:dash, "-"].freeze
-    DOT = [:dot, "."].freeze
-    DOTDOT = [:dotdot, ".."].freeze
-    DOT_ORD = ".".ord
-    DOUBLE_STRING_LITERAL = /"[^\"]*"/
-    EOS = [:end_of_string].freeze
+    SPECIALS = {
+      '|' => :pipe,
+      '.' => :dot,
+      ':' => :colon,
+      ',' => :comma,
+      '[' => :open_square,
+      ']' => :close_square,
+      '(' => :open_round,
+      ')' => :close_round,
+      '?' => :question,
+      '-' => :dash,
+    }.freeze
     IDENTIFIER            = /[a-zA-Z_][\w-]*\??/
-    NUMBER_LITERAL        = /-?\d+(\.\d+)?/
-    OPEN_ROUND = [:open_round, "("].freeze
-    OPEN_SQUARE = [:open_square, "["].freeze
-    PIPE = [:pipe, "|"].freeze
-    QUESTION = [:question, "?"].freeze
-    RUBY_WHITESPACE = [" ", "\t", "\r", "\n", "\f"].freeze
     SINGLE_STRING_LITERAL = /'[^\']*'/
+    DOUBLE_STRING_LITERAL = /"[^\"]*"/
+    STRING_LITERAL        = Regexp.union(SINGLE_STRING_LITERAL, DOUBLE_STRING_LITERAL)
+    NUMBER_LITERAL        = /-?\d+(\.\d+)?/
+    DOTDOT                = /\.\./
+    COMPARISON_OPERATOR   = /==|!=|<>|<=?|>=?|contains(?=\s)/
     WHITESPACE_OR_NOTHING = /\s*/
 
-    SINGLE_COMPARISON_TOKENS = [].tap do |table|
-      table["<".ord] = COMPARISON_LESS_THAN
-      table[">".ord] = COMPARISON_GREATER_THAN
-      table.freeze
+    def initialize(input)
+      @ss = StringScanner.new(input)
     end
 
-    TWO_CHARS_COMPARISON_JUMP_TABLE = [].tap do |table|
-      table["=".ord] = [].tap do |sub_table|
-        sub_table["=".ord] = COMPARISON_EQUAL
-        sub_table.freeze
-      end
-      table["!".ord] = [].tap do |sub_table|
-        sub_table["=".ord] = COMPARISION_NOT_EQUAL
-        sub_table.freeze
-      end
-      table.freeze
-    end
+    def tokenize
+      @output = []
 
-    COMPARISON_JUMP_TABLE = [].tap do |table|
-      table["<".ord] = [].tap do |sub_table|
-        sub_table["=".ord] = COMPARISON_LESS_THAN_OR_EQUAL
-        sub_table[">".ord] = COMPARISON_NOT_EQUAL_ALT
-        sub_table.freeze
-      end
-      table[">".ord] = [].tap do |sub_table|
-        sub_table["=".ord] = COMPARISON_GREATER_THAN_OR_EQUAL
-        sub_table.freeze
-      end
-      table.freeze
-    end
-
-    NEXT_MATCHER_JUMP_TABLE = [].tap do |table|
-      "a".upto("z") do |c|
-        table[c.ord] = [:id, IDENTIFIER].freeze
-        table[c.upcase.ord] = [:id, IDENTIFIER].freeze
-      end
-      table["_".ord] = [:id, IDENTIFIER].freeze
-
-      "0".upto("9") do |c|
-        table[c.ord] = [:number, NUMBER_LITERAL].freeze
-      end
-      table["-".ord] = [:number, NUMBER_LITERAL].freeze
-
-      table["'".ord] = [:string, SINGLE_STRING_LITERAL].freeze
-      table["\"".ord] = [:string, DOUBLE_STRING_LITERAL].freeze
-      table.freeze
-    end
-
-    SPECIAL_TABLE = [].tap do |table|
-      table["|".ord] = PIPE
-      table[".".ord] = DOT
-      table[":".ord] = COLON
-      table[",".ord] = COMMA
-      table["[".ord] = OPEN_SQUARE
-      table["]".ord] = CLOSE_SQUARE
-      table["(".ord] = OPEN_ROUND
-      table[")".ord] = CLOSE_ROUND
-      table["?".ord] = QUESTION
-      table["-".ord] = DASH
-    end
-
-    NUMBER_TABLE = [].tap do |table|
-      "0".upto("9") do |c|
-        table[c.ord] = true
-      end
-      table.freeze
-    end
-
-    # rubocop:disable Metrics/BlockNesting
-    class << self
-      def tokenize(ss)
-        output = []
-
-        until ss.eos?
-          ss.skip(WHITESPACE_OR_NOTHING)
-
-          break if ss.eos?
-
-          start_pos = ss.pos
-          peeked = ss.peek_byte
-
-          if (special = SPECIAL_TABLE[peeked])
-            ss.scan_byte
-            # Special case for ".."
-            if special == DOT && ss.peek_byte == DOT_ORD
-              ss.scan_byte
-              output << DOTDOT
-            elsif special == DASH
-              # Special case for negative numbers
-              if (peeked_byte = ss.peek_byte) && NUMBER_TABLE[peeked_byte]
-                ss.pos -= 1
-                output << [:number, ss.scan(NUMBER_LITERAL)]
-              else
-                output << special
-              end
-            else
-              output << special
-            end
-          elsif (sub_table = TWO_CHARS_COMPARISON_JUMP_TABLE[peeked])
-            ss.scan_byte
-            if (peeked_byte = ss.peek_byte) && (found = sub_table[peeked_byte])
-              output << found
-              ss.scan_byte
-            elsif peeked == "=".ord && ss.peek_byte != "<".ord && ss.peek_byte != ">".ord && ss.peek_byte != "!".ord
-              output << ASSIGN
-            else
-              raise_syntax_error(start_pos, ss)
-            end
-          elsif (sub_table = COMPARISON_JUMP_TABLE[peeked])
-            ss.scan_byte
-            if (peeked_byte = ss.peek_byte) && (found = sub_table[peeked_byte])
-              output << found
-              ss.scan_byte
-            else
-              output << SINGLE_COMPARISON_TOKENS[peeked]
-            end
+      until @ss.eos?
+        @ss.skip(WHITESPACE_OR_NOTHING)
+        break if @ss.eos?
+        tok      = if (t = @ss.scan(COMPARISON_OPERATOR))
+          [:comparison, t]
+        elsif (t = @ss.scan(STRING_LITERAL))
+          [:string, t]
+        elsif (t = @ss.scan(NUMBER_LITERAL))
+          [:number, t]
+        elsif (t = @ss.scan(IDENTIFIER))
+          [:id, t]
+        elsif (t = @ss.scan(DOTDOT))
+          [:dotdot, t]
+        else
+          c     = @ss.getch
+          if (s = SPECIALS[c])
+            [s, c]
           else
-            type, pattern = NEXT_MATCHER_JUMP_TABLE[peeked]
-
-            if type && (t = ss.scan(pattern))
-              # Special case for "contains"
-              output << if type == :id && t == "contains" && output.last&.first != :dot
-                COMPARISON_CONTAINS
-              else
-                [type, t]
-              end
-            else
-              raise_syntax_error(start_pos, ss)
-            end
+            raise SyntaxError, "Unexpected character #{c}"
           end
         end
-        # rubocop:enable Metrics/BlockNesting
-        output << EOS
-      rescue ::ArgumentError => e
-        if e.message == "invalid byte sequence in #{ss.string.encoding}"
-          raise SyntaxError, "Invalid byte sequence in #{ss.string.encoding}"
-        else
-          raise
-        end
+        @output << tok
       end
 
-      def raise_syntax_error(start_pos, ss)
-        ss.pos = start_pos
-        # the character could be a UTF-8 character, use getch to get all the bytes
-        raise SyntaxError, "Unexpected character #{ss.getch}"
-      end
+      @output << [:end_of_string]
     end
   end
 end

lib/liquid/locales/en.yml

@@ -2,14 +2,12 @@
   errors:
     syntax:
       tag_unexpected_args: "Syntax Error in '%{tag}' - Valid syntax: %{tag}"
-      block_tag_unexpected_args: "Syntax Error in '%{tag}' - Valid syntax: {% %{tag} %}{% end%{tag} %}"
       assign: "Syntax Error in 'assign' - Valid syntax: assign [var] = [source]"
       capture: "Syntax Error in 'capture' - Valid syntax: capture [var]"
       case: "Syntax Error in 'case' - Valid syntax: case [condition]"
       case_invalid_when: "Syntax Error in tag 'case' - Valid when condition: {% when [condition] [or condition2...] %}"
       case_invalid_else: "Syntax Error in tag 'case' - Valid else condition: {% else %} (no parameters) "
       cycle: "Syntax Error in 'cycle' - Valid syntax: cycle [name :] var [, var2, var3 ...]"
-      doc_invalid_nested: "Syntax Error in 'doc' - Nested doc tags are not allowed"
       for: "Syntax Error in 'for loop' - Valid syntax: for [item] in [collection]"
       for_invalid_in: "For loops require an 'in' clause"
       for_invalid_attribute: "Invalid attribute in for loop. Valid attributes are limit and offset"
@@ -17,10 +15,8 @@
       include: "Error in tag 'include' - Valid syntax: include '[template]' (with|for) [object|collection]"
       inline_comment_invalid: "Syntax error in tag '#' - Each line of comments must be prefixed by the '#' character"
       invalid_delimiter: "'%{tag}' is not a valid delimiter for %{block_name} tags. use %{block_delimiter}"
-      invalid_template_encoding: "Invalid template encoding"
       render: "Syntax error in tag 'render' - Template name must be a quoted string"
       table_row: "Syntax Error in 'table_row loop' - Valid syntax: table_row [item] in [collection] cols=3"
-      table_row_invalid_attribute: "Invalid attribute '%{attribute}' in tablerow loop. Valid attributes are cols, limit, offset, and range"
       tag_never_closed: "'%{block_name}' tag was never closed"
       tag_termination: "Tag '%{token}' was not properly terminated with regexp: %{tag_end}"
       unexpected_else: "%{block_name} tag does not expect 'else' tag"

lib/liquid/parse_context.rb

@@ -3,27 +3,14 @@
 module Liquid
   class ParseContext
     attr_accessor :locale, :line_number, :trim_whitespace, :depth
-    attr_reader :partial, :warnings, :error_mode, :environment
+    attr_reader :partial, :warnings, :error_mode
 
-    def initialize(options = Const::EMPTY_HASH)
-      @environment = options.fetch(:environment, Environment.default)
+    def initialize(options = {})
       @template_options = options ? options.dup : {}
 
       @locale   = @template_options[:locale] ||= I18n.new
       @warnings = []
 
-      # constructing new StringScanner in Lexer, Tokenizer, etc is expensive
-      # This StringScanner will be shared by all of them
-      @string_scanner = StringScanner.new("")
-
-      @expression_cache = if options[:expression_cache].nil?
-        {}
-      elsif options[:expression_cache].respond_to?(:[]) && options[:expression_cache].respond_to?(:[]=)
-        options[:expression_cache]
-      elsif options[:expression_cache]
-        {}
-      end
-
       self.depth   = 0
       self.partial = false
     end
@@ -36,96 +23,19 @@ module Liquid
       Liquid::BlockBody.new
     end
 
-    def new_parser(input)
-      @string_scanner.string = input
-      Parser.new(
-        @string_scanner,
-        reject_bare_brackets: @error_mode == :strict2 || @error_mode == :rigid,
-        allow_calls: @error_mode == :strict2,
-      )
+    def new_tokenizer(markup, start_line_number: nil, for_liquid_tag: false)
+      Tokenizer.new(markup, line_number: start_line_number, for_liquid_tag: for_liquid_tag)
     end
 
-    def new_tokenizer(source, start_line_number: nil, for_liquid_tag: false)
-      Tokenizer.new(
-        source: source,
-        string_scanner: @string_scanner,
-        line_number: start_line_number,
-        for_liquid_tag: for_liquid_tag,
-      )
-    end
-
-    def safe_parse_expression(parser)
-      Expression.safe_parse(parser, @string_scanner, @expression_cache)
-    end
-
-    def parse_expression(markup, safe: false)
-      if !safe && @error_mode == :strict2
-        # parse_expression is a widely used API. To maintain backward
-        # compatibility while raising awareness about strict2 parser standards,
-        # the safe flag supports API users make a deliberate decision.
-        #
-        # In strict2 mode, markup MUST come from parser.expression, which returns
-        # markup or a parsed callable node. We're not calling the parser here to
-        # prevent redundant parser overhead.
-        raise Liquid::InternalError, "unsafe parse_expression cannot be used in strict2 mode"
-      end
-
-      Expression.parse(markup, @string_scanner, @expression_cache)
-    end
-
-    def with_document_scope(&block)
-      previous_usage = @uses_local_bindings
-      @uses_local_bindings = false
-      with_lexical_scope(&block)
-      @uses_local_bindings
-    ensure
-      @uses_local_bindings = previous_usage
-    end
-
-    def with_lexical_scope(parameters = Const::EMPTY_ARRAY)
-      previous_scope = @lexical_scope
-      @lexical_scope = parameters.to_h { |name| [name, true] }
-      yield
-    ensure
-      @lexical_scope = previous_scope
-    end
-
-    def local_declarations?
-      @lexical_scope && !@lexical_scope.empty?
-    end
-
-    def declare_local(name)
-      @lexical_scope ||= {}
-      raise SyntaxError, "Duplicate let declaration '#{name}'" if @lexical_scope.key?(name)
-
-      @lexical_scope[name] = true
-    end
-
-    def with_closure(parameters = Const::EMPTY_ARRAY, &block)
-      require_closures!
-      previous_closure = @in_closure
-      @in_closure = true
-      with_lexical_scope(parameters, &block)
-    ensure
-      @in_closure = previous_closure
-    end
-
-    def in_closure?
-      @in_closure
-    end
-
-    def require_closures!
-      @uses_local_bindings = true
-      return if @error_mode == :strict2
-
-      raise SyntaxError, "Closures require strict2 mode"
+    def parse_expression(markup)
+      Expression.parse(markup)
     end
 
     def partial=(value)
       @partial = value
       @options = value ? partial_options : @template_options
 
-      @error_mode = @options[:error_mode] || @environment.error_mode
+      @error_mode = @options[:error_mode] || Template.error_mode
     end
 
     def partial_options

lib/liquid/parse_tree_visitor.rb

@@ -36,7 +36,7 @@ module Liquid
     protected
 
     def children
-      @node.respond_to?(:nodelist) ? Array(@node.nodelist) : Const::EMPTY_ARRAY
+      @node.respond_to?(:nodelist) ? Array(@node.nodelist) : []
     end
   end
 end

lib/liquid/parser.rb

@@ -2,12 +2,10 @@
 
 module Liquid
   class Parser
-    def initialize(input, reject_bare_brackets: false, allow_calls: false)
-      ss = input.is_a?(StringScanner) ? input : StringScanner.new(input)
-      @tokens = Lexer.tokenize(ss)
+    def initialize(input)
+      l       = Lexer.new(input)
+      @tokens = l.tokenize
       @p      = 0 # pointer to current location
-      @reject_bare_brackets = reject_bare_brackets
-      @allow_calls = allow_calls
     end
 
     def jump(point)
@@ -52,15 +50,10 @@ module Liquid
       token = @tokens[@p]
       case token[0]
       when :id
-        return callable_or_lookup if @allow_calls
-
         str = consume
         str << variable_lookups
       when :open_square
-        if @reject_bare_brackets
-          raise SyntaxError, "Bare bracket access is not allowed. Use #{Expression::SELF}['...'] instead"
-        end
-        str = consume.dup
+        str = consume
         str << expression
         str << consume(:close_square)
         str << variable_lookups
@@ -72,41 +65,12 @@ module Liquid
         consume(:dotdot)
         last = expression
         consume(:close_round)
-        return RangeLookup.new(Expression.parse(first), Expression.parse(last)) unless first.is_a?(String) && last.is_a?(String)
-
         "(#{first}..#{last})"
       else
         raise SyntaxError, "#{token} is not a valid expression"
       end
     end
 
-    def expression_with_markup
-      start = @p
-      # Parsing lookups appends to consumed identifier strings.
-      markup_tokens = @tokens[start...-1].map { |token| token[1].dup }
-      value = expression
-      markup = value.is_a?(String) ? value : markup_tokens.take(@p - start).join
-      [value, markup]
-    end
-
-    def remaining_markup
-      @tokens[@p...-1].map { |token| token[1] }.join(' ')
-    end
-
-    def parameters
-      parameters = []
-      return parameters unless consume?(:open_round)
-
-      unless look(:close_round)
-        parameters << consume(:id)
-        parameters << consume(:id) while consume?(:comma) && !look(:close_round)
-      end
-      consume(:close_round)
-      raise SyntaxError, "Duplicate closure parameter" unless parameters.uniq.length == parameters.length
-
-      parameters
-    end
-
     def argument
       str = +""
       # might be a keyword argument (identifier: expression)
@@ -134,46 +98,5 @@ module Liquid
       end
       str
     end
-
-    private
-
-    def callable_or_lookup
-      target = callable_lookups(consume(:id))
-      return target unless consume?(:open_round)
-
-      arguments = []
-      unless look(:close_round)
-        arguments << Expression.parse(expression)
-        arguments << Expression.parse(expression) while consume?(:comma) && !look(:close_round)
-      end
-      consume(:close_round)
-      target = VariableLookup.parse(target) if target.is_a?(String)
-      CallExpression.new(target, arguments)
-    end
-
-    def callable_lookups(target)
-      loop do
-        if consume?(:dot)
-          target = append_lookup(target, consume(:id), command: true)
-          next
-        end
-        break unless consume?(:open_square)
-
-        key = expression
-        consume(:close_square)
-        target = append_lookup(target, key)
-      end
-      target
-    end
-
-    def append_lookup(target, key, command: false)
-      if target.is_a?(String) && key.is_a?(String)
-        return target << (command ? ".#{key}" : "[#{key}]")
-      end
-
-      target = VariableLookup.parse(target) if target.is_a?(String)
-      target.add_lookup(command ? key : Expression.parse(key), command: command)
-      target
-    end
   end
 end

lib/liquid/parser_switching.rb

@@ -2,25 +2,10 @@
 
 module Liquid
   module ParserSwitching
-    # Do not use this.
-    #
-    # It's basically doing the same thing the {#parse_with_selected_parser},
-    # except this will try the strict parser regardless of the error mode,
-    # and fall back to the lax parser if the error mode is lax or warn,
-    # except when in strict2 mode where it uses the strict2 parser.
-    #
-    # @deprecated Use {#parse_with_selected_parser} instead.
     def strict_parse_with_error_mode_fallback(markup)
-      return strict2_parse_with_error_context(markup) if strict2_mode?
-
       strict_parse_with_error_context(markup)
     rescue SyntaxError => e
       case parse_context.error_mode
-      when :rigid
-        rigid_warn
-        raise
-      when :strict2
-        raise
       when :strict
         raise
       when :warn
@@ -31,13 +16,11 @@ module Liquid
 
     def parse_with_selected_parser(markup)
       case parse_context.error_mode
-      when :rigid   then rigid_warn && strict2_parse_with_error_context(markup)
-      when :strict2 then strict2_parse_with_error_context(markup)
-      when :strict  then strict_parse_with_error_context(markup)
-      when :lax     then lax_parse(markup)
+      when :strict then strict_parse_with_error_context(markup)
+      when :lax    then lax_parse(markup)
       when :warn
         begin
-          strict2_parse_with_error_context(markup)
+          strict_parse_with_error_context(markup)
         rescue SyntaxError => e
           parse_context.warnings << e
           lax_parse(markup)
@@ -45,24 +28,8 @@ module Liquid
       end
     end
 
-    def strict2_mode?
-      parse_context.error_mode == :strict2 || parse_context.error_mode == :rigid
-    end
-
     private
 
-    def rigid_warn
-      Deprecations.warn(':rigid', ':strict2')
-    end
-
-    def strict2_parse_with_error_context(markup)
-      strict2_parse(markup)
-    rescue SyntaxError => e
-      e.line_number    = line_number
-      e.markup_context = markup_context(markup)
-      raise e
-    end
-
     def strict_parse_with_error_context(markup)
       strict_parse(markup)
     rescue SyntaxError => e

lib/liquid/partial_cache.rb

@@ -4,8 +4,7 @@ module Liquid
   class PartialCache
     def self.load(template_name, context:, parse_context:)
       cached_partials = context.registers[:cached_partials]
-      cache_key = "#{template_name}:#{parse_context.error_mode}"
-      cached = cached_partials[cache_key]
+      cached = cached_partials[template_name]
       return cached if cached
 
       file_system = context.registers[:file_system]
@@ -16,16 +15,8 @@ module Liquid
       template_factory = context.registers[:template_factory]
       template = template_factory.for(template_name)
 
-      begin
-        partial = template.parse(source, parse_context)
-      rescue Liquid::Error => e
-        e.template_name = template&.name || template_name
-        raise e
-      end
-
-      partial.name ||= template_name
-
-      cached_partials[cache_key] = partial
+      partial = template.parse(source, parse_context)
+      cached_partials[template_name] = partial
     ensure
       parse_context.partial = false
     end

lib/liquid/range_lookup.rb

@@ -2,9 +2,9 @@
 
 module Liquid
   class RangeLookup
-    def self.parse(start_markup, end_markup, string_scanner, cache = nil)
-      start_obj = Expression.parse(start_markup, string_scanner, cache)
-      end_obj   = Expression.parse(end_markup, string_scanner, cache)
+    def self.parse(start_markup, end_markup)
+      start_obj = Expression.parse(start_markup)
+      end_obj   = Expression.parse(end_markup)
       if start_obj.respond_to?(:evaluate) || end_obj.respond_to?(:evaluate)
         new(start_obj, end_obj)
       else

lib/liquid/resource_limits.rb

@@ -2,39 +2,24 @@
 
 module Liquid
   class ResourceLimits
-    attr_accessor :render_length_limit,
-      :render_score_limit,
-      :assign_score_limit,
-      :cumulative_render_score_limit,
-      :cumulative_assign_score_limit
-    attr_reader :render_score,
-      :assign_score,
-      :cumulative_render_score,
-      :cumulative_assign_score
+    attr_accessor :render_length_limit, :render_score_limit, :assign_score_limit
+    attr_reader :render_score, :assign_score
 
     def initialize(limits)
-      @render_length_limit           = limits[:render_length_limit]
-      @render_score_limit            = limits[:render_score_limit]
-      @assign_score_limit            = limits[:assign_score_limit]
-      @cumulative_render_score_limit = limits[:cumulative_render_score_limit]
-      @cumulative_assign_score_limit = limits[:cumulative_assign_score_limit]
-      @cumulative_render_score = 0
-      @cumulative_assign_score = 0
+      @render_length_limit = limits[:render_length_limit]
+      @render_score_limit  = limits[:render_score_limit]
+      @assign_score_limit  = limits[:assign_score_limit]
       reset
     end
 
     def increment_render_score(amount)
       @render_score += amount
-      @cumulative_render_score += amount
       raise_limits_reached if @render_score_limit && @render_score > @render_score_limit
-      raise_limits_reached if @cumulative_render_score_limit && @cumulative_render_score > @cumulative_render_score_limit
     end
 
     def increment_assign_score(amount)
       @assign_score += amount
-      @cumulative_assign_score += amount
       raise_limits_reached if @assign_score_limit && @assign_score > @assign_score_limit
-      raise_limits_reached if @cumulative_assign_score_limit && @cumulative_assign_score > @cumulative_assign_score_limit
     end
 
     # update either render_length or assign_score based on whether or not the writes are captured
@@ -62,8 +47,6 @@ module Liquid
       @reached_limit = false
       @last_capture_length = nil
       @render_score = @assign_score = 0
-      raise_limits_reached if @cumulative_render_score_limit && @cumulative_render_score > @cumulative_render_score_limit
-      raise_limits_reached if @cumulative_assign_score_limit && @cumulative_assign_score > @cumulative_assign_score_limit
     end
 
     def with_capture

lib/liquid/self_drop.rb

@@ -1,54 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  # @liquid_public_docs
-  # @liquid_type object
-  # @liquid_name self
-  # @liquid_summary
-  #   Provides access to variables through the current scope chain.
-  # @liquid_description
-  #   The `self` object resolves variables through the normal lookup hierarchy
-  #   (local > file > global) without exposing filters, interrupts, errors,
-  #   or other context internals. It's used when bare bracket notation
-  #   (`['variable']`) needs to be replaced with an explicit variable lookup.
-  #
-  #   If `self` is explicitly assigned as a local variable (e.g. `{% assign self = 'value' %}`),
-  #   then the local value takes precedence over the `self` object.
-  # @liquid_access global
-  class SelfDrop < Drop
-    def initialize(self_context)
-      super()
-      @self_context = self_context
-    end
-
-    def [](key)
-      @self_context.find_variable(key)
-    rescue UndefinedVariable
-      nil
-    end
-
-    def key?(key)
-      @self_context.variable_defined?(key)
-    end
-
-    def to_liquid
-      self
-    end
-
-    def ==(other)
-      other.is_a?(SelfDrop) && other.self_context.equal?(@self_context)
-    end
-
-    alias_method :eql?, :==
-
-    def hash
-      @self_context.object_id.hash
-    end
-
-    protected
-
-    attr_reader :self_context
-
-    undef context=
-  end
-end

lib/liquid/standardfilters.rb

@@ -3,24 +3,16 @@
 require 'cgi'
 require 'base64'
 require 'bigdecimal'
+
 module Liquid
   module StandardFilters
     MAX_I32 = (1 << 31) - 1
     private_constant :MAX_I32
 
-    supports_64bit_indices = begin
-      [][1 << 33, 1 << 33]
-      true
-    rescue RangeError
-      false
-    end
-
-    INDEX_RANGE = if supports_64bit_indices
-      (-(1 << 63))..((1 << 63) - 1)
-    else
-      (-(1 << 31))..((1 << 31) - 1)
-    end
-    private_constant :INDEX_RANGE
+    MIN_I64 = -(1 << 63)
+    MAX_I64 = (1 << 63) - 1
+    I64_RANGE = MIN_I64..MAX_I64
+    private_constant :MIN_I64, :MAX_I64, :I64_RANGE
 
     HTML_ESCAPE = {
       '&' => '&amp;',
@@ -33,23 +25,10 @@ module Liquid
     STRIP_HTML_BLOCKS       = Regexp.union(
       %r{<script.*?</script>}m,
       /<!--.*?-->/m,
-      %r{<style.*?</style>}m,
+      %r{<style.*?</style>}m
     )
     STRIP_HTML_TAGS = /<.*?>/m
 
-    class << self
-      def try_coerce_encoding(input, encoding:)
-        original_encoding = input.encoding
-        if input.encoding != encoding
-          input.force_encoding(encoding)
-          unless input.valid_encoding?
-            input.force_encoding(original_encoding)
-          end
-        end
-        input
-      end
-    end
-
     # @liquid_public_docs
     # @liquid_type filter
     # @liquid_category array
@@ -72,7 +51,7 @@ module Liquid
     # @liquid_syntax string | downcase
     # @liquid_return [string]
     def downcase(input)
-      Utils.to_s(input).downcase
+      input.to_s.downcase
     end
 
     # @liquid_public_docs
@@ -83,18 +62,18 @@ module Liquid
     # @liquid_syntax string | upcase
     # @liquid_return [string]
     def upcase(input)
-      Utils.to_s(input).upcase
+      input.to_s.upcase
     end
 
     # @liquid_public_docs
     # @liquid_type filter
     # @liquid_category string
     # @liquid_summary
-    #   Capitalizes the first word in a string and downcases the remaining characters.
+    #   Capitalizes the first word in a string.
     # @liquid_syntax string | capitalize
     # @liquid_return [string]
     def capitalize(input)
-      Utils.to_s(input).capitalize
+      input.to_s.capitalize
     end
 
     # @liquid_public_docs
@@ -105,7 +84,7 @@ module Liquid
     # @liquid_syntax string | escape
     # @liquid_return [string]
     def escape(input)
-      CGI.escapeHTML(Utils.to_s(input)) unless input.nil?
+      CGI.escapeHTML(input.to_s) unless input.nil?
     end
     alias_method :h, :escape
 
@@ -117,7 +96,7 @@ module Liquid
     # @liquid_syntax string | escape_once
     # @liquid_return [string]
     def escape_once(input)
-      Utils.to_s(input).gsub(HTML_ESCAPE_ONCE_REGEXP, HTML_ESCAPE)
+      input.to_s.gsub(HTML_ESCAPE_ONCE_REGEXP, HTML_ESCAPE)
     end
 
     # @liquid_public_docs
@@ -132,7 +111,7 @@ module Liquid
     # @liquid_syntax string | url_encode
     # @liquid_return [string]
     def url_encode(input)
-      CGI.escape(Utils.to_s(input)) unless input.nil?
+      CGI.escape(input.to_s) unless input.nil?
     end
 
     # @liquid_public_docs
@@ -146,7 +125,7 @@ module Liquid
     def url_decode(input)
       return if input.nil?
 
-      result = CGI.unescape(Utils.to_s(input))
+      result = CGI.unescape(input.to_s)
       raise Liquid::ArgumentError, "invalid byte sequence in #{result.encoding}" unless result.valid_encoding?
 
       result
@@ -160,7 +139,7 @@ module Liquid
     # @liquid_syntax string | base64_encode
     # @liquid_return [string]
     def base64_encode(input)
-      Base64.strict_encode64(Utils.to_s(input))
+      Base64.strict_encode64(input.to_s)
     end
 
     # @liquid_public_docs
@@ -171,8 +150,7 @@ module Liquid
     # @liquid_syntax string | base64_decode
     # @liquid_return [string]
     def base64_decode(input)
-      input = Utils.to_s(input)
-      StandardFilters.try_coerce_encoding(Base64.strict_decode64(input), encoding: input.encoding)
+      Base64.strict_decode64(input.to_s)
     rescue ::ArgumentError
       raise Liquid::ArgumentError, "invalid base64 provided to base64_decode"
     end
@@ -185,7 +163,7 @@ module Liquid
     # @liquid_syntax string | base64_url_safe_encode
     # @liquid_return [string]
     def base64_url_safe_encode(input)
-      Base64.urlsafe_encode64(Utils.to_s(input))
+      Base64.urlsafe_encode64(input.to_s)
     end
 
     # @liquid_public_docs
@@ -196,8 +174,7 @@ module Liquid
     # @liquid_syntax string | base64_url_safe_decode
     # @liquid_return [string]
     def base64_url_safe_decode(input)
-      input = Utils.to_s(input)
-      StandardFilters.try_coerce_encoding(Base64.urlsafe_decode64(input), encoding: input.encoding)
+      Base64.urlsafe_decode64(input.to_s)
     rescue ::ArgumentError
       raise Liquid::ArgumentError, "invalid base64 provided to base64_url_safe_decode"
     end
@@ -220,14 +197,14 @@ module Liquid
         if input.is_a?(Array)
           input.slice(offset, length) || []
         else
-          Utils.to_s(input).slice(offset, length) || ''
+          input.to_s.slice(offset, length) || ''
         end
       rescue RangeError
-        if INDEX_RANGE.cover?(length) && INDEX_RANGE.cover?(offset)
+        if I64_RANGE.cover?(length) && I64_RANGE.cover?(offset)
           raise # unexpected error
         end
-        offset = offset.clamp(INDEX_RANGE)
-        length = length.clamp(INDEX_RANGE)
+        offset = offset.clamp(I64_RANGE)
+        length = length.clamp(I64_RANGE)
         retry
       end
     end
@@ -244,10 +221,10 @@ module Liquid
     # @liquid_return [string]
     def truncate(input, length = 50, truncate_string = "...")
       return if input.nil?
-      input_str = Utils.to_s(input)
+      input_str = input.to_s
       length    = Utils.to_integer(length)
 
-      truncate_string_str = Utils.to_s(truncate_string)
+      truncate_string_str = truncate_string.to_s
 
       l = length - truncate_string_str.length
       l = 0 if l < 0
@@ -271,7 +248,7 @@ module Liquid
     # @liquid_return [string]
     def truncatewords(input, words = 15, truncate_string = "...")
       return if input.nil?
-      input = Utils.to_s(input)
+      input = input.to_s
       words = Utils.to_integer(words)
       words = 1 if words <= 0
 
@@ -285,8 +262,7 @@ module Liquid
       return input if wordlist.length <= words
 
       wordlist.pop
-      truncate_string = Utils.to_s(truncate_string)
-      wordlist.join(" ").concat(truncate_string)
+      wordlist.join(" ").concat(truncate_string.to_s)
     end
 
     # @liquid_public_docs
@@ -297,22 +273,7 @@ module Liquid
     # @liquid_syntax string | split: string
     # @liquid_return [array[string]]
     def split(input, pattern)
-      pattern = Utils.to_s(pattern)
-      input = Utils.to_s(input)
-      input.split(pattern)
-    end
-
-    # @liquid_public_docs
-    # @liquid_type filter
-    # @liquid_category string
-    # @liquid_summary
-    #   Removes leading and trailing whitespace and collapses consecutive whitespace to a single space.
-    # @liquid_syntax string | squish
-    # @liquid_return [string]
-    def squish(input)
-      return if input.nil?
-
-      Utils.to_s(input).strip.gsub(/\s+/, ' ')
+      input.to_s.split(pattern.to_s)
     end
 
     # @liquid_public_docs
@@ -323,8 +284,7 @@ module Liquid
     # @liquid_syntax string | strip
     # @liquid_return [string]
     def strip(input)
-      input = Utils.to_s(input)
-      input.strip
+      input.to_s.strip
     end
 
     # @liquid_public_docs
@@ -335,8 +295,7 @@ module Liquid
     # @liquid_syntax string | lstrip
     # @liquid_return [string]
     def lstrip(input)
-      input = Utils.to_s(input)
-      input.lstrip
+      input.to_s.lstrip
     end
 
     # @liquid_public_docs
@@ -347,8 +306,7 @@ module Liquid
     # @liquid_syntax string | rstrip
     # @liquid_return [string]
     def rstrip(input)
-      input = Utils.to_s(input)
-      input.rstrip
+      input.to_s.rstrip
     end
 
     # @liquid_public_docs
@@ -359,9 +317,8 @@ module Liquid
     # @liquid_syntax string | strip_html
     # @liquid_return [string]
     def strip_html(input)
-      input = Utils.to_s(input)
       empty  = ''
-      result = input.gsub(STRIP_HTML_BLOCKS, empty)
+      result = input.to_s.gsub(STRIP_HTML_BLOCKS, empty)
       result.gsub!(STRIP_HTML_TAGS, empty)
       result
     end
@@ -374,8 +331,7 @@ module Liquid
     # @liquid_syntax string | strip_newlines
     # @liquid_return [string]
     def strip_newlines(input)
-      input = Utils.to_s(input)
-      input.gsub(/\r?\n/, '')
+      input.to_s.gsub(/\r?\n/, '')
     end
 
     # @liquid_public_docs
@@ -386,7 +342,6 @@ module Liquid
     # @liquid_syntax array | join
     # @liquid_return [string]
     def join(input, glue = ' ')
-      glue = Utils.to_s(glue)
       InputIterator.new(input, context).join(glue)
     end
 
@@ -454,59 +409,29 @@ module Liquid
     # @liquid_syntax array | where: string, string
     # @liquid_return [array[untyped]]
     def where(input, property, target_value = nil)
-      filter_array(input, property, target_value) { |ary, &block| ary.select(&block) }
-    end
+      ary = InputIterator.new(input, context)
 
-    # @liquid_public_docs
-    # @liquid_type filter
-    # @liquid_category array
-    # @liquid_summary
-    #   Filters an array to exclude items with a specific property value.
-    # @liquid_description
-    #   This requires you to provide both the property name and the associated value.
-    # @liquid_syntax array | reject: string, string
-    # @liquid_return [array[untyped]]
-    def reject(input, property, target_value = nil)
-      filter_array(input, property, target_value) { |ary, &block| ary.reject(&block) }
-    end
-
-    # @liquid_public_docs
-    # @liquid_type filter
-    # @liquid_category array
-    # @liquid_summary
-    #   Tests if any item in an array has a specific property value.
-    # @liquid_description
-    #   This requires you to provide both the property name and the associated value.
-    # @liquid_syntax array | has: string, string
-    # @liquid_return [boolean]
-    def has(input, property, target_value = nil)
-      filter_array(input, property, target_value, false) { |ary, &block| ary.any?(&block) }
-    end
-
-    # @liquid_public_docs
-    # @liquid_type filter
-    # @liquid_category array
-    # @liquid_summary
-    #   Returns the first item in an array with a specific property value.
-    # @liquid_description
-    #   This requires you to provide both the property name and the associated value.
-    # @liquid_syntax array | find: string, string
-    # @liquid_return [untyped]
-    def find(input, property, target_value = nil)
-      filter_array(input, property, target_value, nil) { |ary, &block| ary.find(&block) }
-    end
-
-    # @liquid_public_docs
-    # @liquid_type filter
-    # @liquid_category array
-    # @liquid_summary
-    #   Returns the index of the first item in an array with a specific property value.
-    # @liquid_description
-    #   This requires you to provide both the property name and the associated value.
-    # @liquid_syntax array | find_index: string, string
-    # @liquid_return [number]
-    def find_index(input, property, target_value = nil)
-      filter_array(input, property, target_value, nil) { |ary, &block| ary.find_index(&block) }
+      if ary.empty?
+        []
+      elsif target_value.nil?
+        ary.select do |item|
+          item[property]
+        rescue TypeError
+          raise_property_error(property)
+        rescue NoMethodError
+          return nil unless item.respond_to?(:[])
+          raise
+        end
+      else
+        ary.select do |item|
+          item[property] == target_value
+        rescue TypeError
+          raise_property_error(property)
+        rescue NoMethodError
+          return nil unless item.respond_to?(:[])
+          raise
+        end
+      end
     end
 
     # @liquid_public_docs
@@ -603,10 +528,7 @@ module Liquid
     # @liquid_syntax string | replace: string, string
     # @liquid_return [string]
     def replace(input, string, replacement = '')
-      string = Utils.to_s(string)
-      replacement = Utils.to_s(replacement)
-      input = Utils.to_s(input)
-      input.gsub(string, replacement)
+      input.to_s.gsub(string.to_s, replacement.to_s)
     end
 
     # @liquid_public_docs
@@ -617,10 +539,7 @@ module Liquid
     # @liquid_syntax string | replace_first: string, string
     # @liquid_return [string]
     def replace_first(input, string, replacement = '')
-      string = Utils.to_s(string)
-      replacement = Utils.to_s(replacement)
-      input = Utils.to_s(input)
-      input.sub(string, replacement)
+      input.to_s.sub(string.to_s, replacement.to_s)
     end
 
     # @liquid_public_docs
@@ -631,9 +550,9 @@ module Liquid
     # @liquid_syntax string | replace_last: string, string
     # @liquid_return [string]
     def replace_last(input, string, replacement)
-      input = Utils.to_s(input)
-      string = Utils.to_s(string)
-      replacement = Utils.to_s(replacement)
+      input = input.to_s
+      string = string.to_s
+      replacement = replacement.to_s
 
       start_index = input.rindex(string)
 
@@ -685,9 +604,7 @@ module Liquid
     # @liquid_syntax string | append: string
     # @liquid_return [string]
     def append(input, string)
-      input = Utils.to_s(input)
-      string = Utils.to_s(string)
-      input + string
+      input.to_s + string.to_s
     end
 
     # @liquid_public_docs
@@ -698,7 +615,7 @@ module Liquid
     # @liquid_description
     #   > Note:
     #   > The `concat` filter won't filter out duplicates. If you want to remove duplicates, then you need to use the
-    #   > [`uniq` filter](/docs/api/liquid/filters/uniq).
+    #   > [`uniq` filter](/api/liquid/filters/uniq).
     # @liquid_syntax array | concat: array
     # @liquid_return [array[untyped]]
     def concat(input, array)
@@ -716,9 +633,7 @@ module Liquid
     # @liquid_syntax string | prepend: string
     # @liquid_return [string]
     def prepend(input, string)
-      input = Utils.to_s(input)
-      string = Utils.to_s(string)
-      string + input
+      string.to_s + input.to_s
     end
 
     # @liquid_public_docs
@@ -729,20 +644,10 @@ module Liquid
     # @liquid_syntax string | newline_to_br
     # @liquid_return [string]
     def newline_to_br(input)
-      input = Utils.to_s(input)
-      input.gsub(/\r?\n/, "<br />\n")
+      input.to_s.gsub(/\r?\n/, "<br />\n")
     end
 
-    # @liquid_public_docs
-    # @liquid_type filter
-    # @liquid_category date
-    # @liquid_summary
-    #   Formats a date according to a specified format string.
-    # @liquid_description
-    #   This filter formats a date using various format specifiers. If the format string is empty,
-    #   the original input is returned. If the input cannot be converted to a date, the original input is returned.
-    #
-    #   The following format specifiers can be used:
+    # Reformat a date using Ruby's core Time#strftime( string ) -> string
     #
     #   %a - The abbreviated weekday name (``Sun'')
     #   %A - The  full  weekday  name (``Sunday'')
@@ -771,15 +676,14 @@ module Liquid
     #   %Y - Year with century
     #   %Z - Time zone name
     #   %% - Literal ``%'' character
-    # @liquid_syntax date | date: string
-    # @liquid_return [string]
+    #
+    #   See also: http://www.ruby-doc.org/core/Time.html#method-i-strftime
     def date(input, format)
-      str_format = Utils.to_s(format)
-      return input if str_format.empty?
+      return input if format.to_s.empty?
 
       return input unless (date = Utils.to_date(input))
 
-      date.strftime(str_format)
+      date.strftime(format.to_s)
     end
 
     # @liquid_public_docs
@@ -790,8 +694,6 @@ module Liquid
     # @liquid_syntax array | first
     # @liquid_return [untyped]
     def first(array)
-      # ActiveSupport returns "" for empty strings, not nil
-      return array[0] || "" if array.is_a?(String)
       array.first if array.respond_to?(:first)
     end
 
@@ -803,8 +705,6 @@ module Liquid
     # @liquid_syntax array | last
     # @liquid_return [untyped]
     def last(array)
-      # ActiveSupport returns "" for empty strings, not nil
-      return array[-1] || "" if array.is_a?(String)
       array.last if array.respond_to?(:last)
     end
 
@@ -957,73 +857,24 @@ module Liquid
     # @liquid_summary
     #   Sets a default value for any variable whose value is one of the following:
     #
-    #   - [`empty`](/docs/api/liquid/basics#empty)
-    #   - [`false`](/docs/api/liquid/basics#truthy-and-falsy)
-    #   - [`nil`](/docs/api/liquid/basics#nil)
+    #   - [`empty`](/api/liquid/basics#empty)
+    #   - [`false`](/api/liquid/basics#truthy-and-falsy)
+    #   - [`nil`](/api/liquid/basics#nil)
     # @liquid_syntax variable | default: variable
     # @liquid_return [untyped]
-    # @liquid_optional_param allow_false: [boolean] Whether to use false values instead of the default.
+    # @liquid_optional_param allow_false [boolean] Whether to use false values instead of the default.
     def default(input, default_value = '', options = {})
       options = {} unless options.is_a?(Hash)
       false_check = options['allow_false'] ? input.nil? : !Liquid::Utils.to_liquid_value(input)
       false_check || (input.respond_to?(:empty?) && input.empty?) ? default_value : input
     end
 
-    # @liquid_public_docs
-    # @liquid_type filter
-    # @liquid_category array
-    # @liquid_summary
-    #   Returns the sum of all elements in an array.
-    # @liquid_syntax array | sum
-    # @liquid_return [number]
-    def sum(input, property = nil)
-      ary = InputIterator.new(input, context)
-      return 0 if ary.empty?
-
-      values_for_sum = ary.map do |item|
-        if property.nil?
-          item
-        elsif item.respond_to?(:[])
-          item[property]
-        else
-          0
-        end
-      rescue TypeError
-        raise_property_error(property)
-      end
-
-      result = InputIterator.new(values_for_sum, context).sum do |item|
-        Utils.to_number(item)
-      end
-
-      result.is_a?(BigDecimal) ? result.to_f : result
-    end
-
     private
 
     attr_reader :context
 
-    def filter_array(input, property, target_value, default_value = [], &block)
-      ary = InputIterator.new(input, context)
-
-      return default_value if ary.empty?
-
-      block.call(ary) do |item|
-        if target_value.nil?
-          item[property]
-        else
-          item[property] == target_value
-        end
-      rescue TypeError
-        raise_property_error(property)
-      rescue NoMethodError
-        return nil unless item.respond_to?(:[])
-        raise
-      end
-    end
-
     def raise_property_error(property)
-      raise Liquid::ArgumentError, "cannot select the property '#{Utils.to_s(property)}'"
+      raise Liquid::ArgumentError, "cannot select the property '#{property}'"
     end
 
     def apply_operation(input, operand, operation)
@@ -1048,8 +899,6 @@ module Liquid
     def nil_safe_casecmp(a, b)
       if !a.nil? && !b.nil?
         a.to_s.casecmp(b.to_s)
-      elsif a.nil? && b.nil?
-        0
       else
         a.nil? ? 1 : -1
       end
@@ -1072,18 +921,7 @@ module Liquid
       end
 
       def join(glue)
-        first = true
-        output = +""
-        each do |item|
-          if first
-            first = false
-          else
-            output << glue
-          end
-
-          output << Liquid::Utils.to_s(item)
-        end
-        output
+        to_a.join(glue.to_s)
       end
 
       def concat(args)
@@ -1095,10 +933,7 @@ module Liquid
       end
 
       def uniq(&block)
-        to_a.uniq do |item|
-          item = Utils.to_liquid_value(item)
-          block ? yield(item) : item
-        end
+        to_a.uniq(&block)
       end
 
       def compact
@@ -1119,4 +954,6 @@ module Liquid
       end
     end
   end
+
+  Template.register_filter(StandardFilters)
 end

lib/liquid/strainer_factory.rb

@@ -0,0 +1,41 @@
+# frozen_string_literal: true
+
+module Liquid
+  # StrainerFactory is the factory for the filters system.
+  module StrainerFactory
+    extend self
+
+    def add_global_filter(filter)
+      strainer_class_cache.clear
+      GlobalCache.add_filter(filter)
+    end
+
+    def create(context, filters = [])
+      strainer_from_cache(filters).new(context)
+    end
+
+    def global_filter_names
+      GlobalCache.filter_method_names
+    end
+
+    GlobalCache = Class.new(StrainerTemplate)
+
+    private
+
+    def strainer_from_cache(filters)
+      if filters.empty?
+        GlobalCache
+      else
+        strainer_class_cache[filters] ||= begin
+          klass = Class.new(GlobalCache)
+          filters.each { |f| klass.add_filter(f) }
+          klass
+        end
+      end
+    end
+
+    def strainer_class_cache
+      @strainer_class_cache ||= {}
+    end
+  end
+end

lib/liquid/tablerowloop_drop.rb

@@ -5,7 +5,7 @@ module Liquid
   # @liquid_type object
   # @liquid_name tablerowloop
   # @liquid_summary
-  #   Information about a parent [`tablerow` loop](/docs/api/liquid/tags/tablerow).
+  #   Information about a parent [`tablerow` loop](/api/liquid/tags/tablerow).
   class TablerowloopDrop < Drop
     def initialize(length, cols)
       @length = length

lib/liquid/tag.rb

@@ -1,8 +1,5 @@
 # frozen_string_literal: true
 
-require 'liquid/tag/disabler'
-require 'liquid/tag/disableable'
-
 module Liquid
   class Tag
     attr_reader :nodelist, :tag_name, :line_number, :parse_context
@@ -57,8 +54,7 @@ module Liquid
     # of the `render_to_output_buffer` method will become the default and the `render`
     # method will be removed.
     def render_to_output_buffer(context, output)
-      render_result = render(context)
-      output << render_result if render_result
+      output << render(context)
       output
     end
 
@@ -68,12 +64,8 @@ module Liquid
 
     private
 
-    def safe_parse_expression(parser)
-      parse_context.safe_parse_expression(parser)
-    end
-
-    def parse_expression(markup, safe: false)
-      parse_context.parse_expression(markup, safe: safe)
+    def parse_expression(markup)
+      parse_context.parse_expression(markup)
     end
   end
 end

lib/liquid/tags.rb

@@ -1,53 +0,0 @@
-# frozen_string_literal: true
-
-require_relative "tags/table_row"
-require_relative "tags/echo"
-require_relative "tags/if"
-require_relative "tags/break"
-require_relative "tags/inline_comment"
-require_relative "tags/for"
-require_relative "tags/assign"
-require_relative "tags/let"
-require_relative "tags/set"
-require_relative "tags/ifchanged"
-require_relative "tags/case"
-require_relative "tags/include"
-require_relative "tags/continue"
-require_relative "tags/capture"
-require_relative "tags/decrement"
-require_relative "tags/unless"
-require_relative "tags/increment"
-require_relative "tags/comment"
-require_relative "tags/raw"
-require_relative "tags/render"
-require_relative "tags/cycle"
-require_relative "tags/doc"
-
-module Liquid
-  module Tags
-    STANDARD_TAGS = {
-      'cycle' => Cycle,
-      'render' => Render,
-      'raw' => Raw,
-      'comment' => Comment,
-      'increment' => Increment,
-      'unless' => Unless,
-      'decrement' => Decrement,
-      'capture' => Capture,
-      'continue' => Continue,
-      'include' => Include,
-      'case' => Case,
-      'ifchanged' => Ifchanged,
-      'assign' => Assign,
-      'let' => Let,
-      'set' => SetTag,
-      'for' => For,
-      '#' => InlineComment,
-      'break' => Break,
-      'if' => If,
-      'echo' => Echo,
-      'tablerow' => TableRow,
-      'doc' => Doc,
-    }.freeze
-  end
-end

lib/liquid/tags/assign.rb

@@ -8,18 +8,12 @@ module Liquid
   # @liquid_summary
   #   Creates a new variable.
   # @liquid_description
-  #   You can create variables of any [basic type](/docs/api/liquid/basics#types), [object](/docs/api/liquid/objects), or object property.
-  #
-  #   > Caution:
-  #   > Predefined Liquid objects can be overridden by variables with the same name.
-  #   > To make sure that you can access all Liquid objects, make sure that your variable name doesn't match a predefined object's name.
+  #   You can create variables of any [basic type](/api/liquid/basics#types), [object](/api/liquid/objects), or object property.
   # @liquid_syntax
   #   {% assign variable_name = value %}
   # @liquid_syntax_keyword variable_name The name of the variable being created.
   # @liquid_syntax_keyword value The value you want to assign to the variable.
   class Assign < Tag
-    include ParserSwitching
-
     Syntax = /(#{VariableSignature}+)\s*=\s*(.*)\s*/om
 
     # @api private
@@ -31,12 +25,6 @@ module Liquid
 
     def initialize(tag_name, markup, parse_context)
       super
-      raise SyntaxError, "assign is not allowed in closure bodies" if parse_context.in_closure?
-
-      parse_with_selected_parser(markup)
-    end
-
-    def lax_parse(markup)
       if markup =~ Syntax
         @to   = Regexp.last_match(1)
         @from = Variable.new(Regexp.last_match(2), parse_context)
@@ -45,29 +33,10 @@ module Liquid
       end
     end
 
-    def strict_parse(markup)
-      lax_parse(markup)
-    end
-
-    def strict2_parse(markup)
-      unless markup =~ Syntax
-        self.class.raise_syntax_error(parse_context)
-      end
-
-      lhs = Regexp.last_match(1).strip
-      rhs = Regexp.last_match(2)
-
-      p = @parse_context.new_parser(lhs)
-      @to = p.consume(:id)
-      p.consume(:end_of_string)
-
-      @from = Variable.new(rhs, parse_context)
-    end
-
     def render_to_output_buffer(context, output)
       val = @from.render(context)
       context.scopes.last[@to] = val
-      context.resource_limits.increment_assign_score(self.class.assign_score_of(val))
+      context.resource_limits.increment_assign_score(assign_score_of(val))
       output
     end
 
@@ -75,8 +44,9 @@ module Liquid
       true
     end
 
-    # @api private
-    def self.assign_score_of(val)
+    private
+
+    def assign_score_of(val)
       if val.instance_of?(String)
         val.bytesize
       elsif val.instance_of?(Array)
@@ -102,4 +72,6 @@ module Liquid
       end
     end
   end
+
+  Template.register_tag('assign', Assign)
 end

lib/liquid/tags/break.rb

@@ -15,7 +15,7 @@ module Liquid
   # @liquid_category iteration
   # @liquid_name break
   # @liquid_summary
-  #   Stops a [`for` loop](/docs/api/liquid/tags/for) from iterating.
+  #   Stops a [`for` loop](/api/liquid/tags/for) from iterating.
   # @liquid_syntax
   #   {% break %}
   class Break < Tag
@@ -26,4 +26,6 @@ module Liquid
       output
     end
   end
+
+  Template.register_tag('break', Break)
 end

lib/liquid/tags/capture.rb

@@ -9,10 +9,6 @@ module Liquid
   #   Creates a new variable with a string value.
   # @liquid_description
   #   You can create complex strings with Liquid logic and variables.
-  #
-  #   > Caution:
-  #   > Predefined Liquid objects can be overridden by variables with the same name.
-  #   > To make sure that you can access all Liquid objects, make sure that your variable name doesn't match a predefined object's name.
   # @liquid_syntax
   #   {% capture variable %}
   #     value
@@ -20,18 +16,10 @@ module Liquid
   # @liquid_syntax_keyword variable The name of the variable being created.
   # @liquid_syntax_keyword value The value you want to assign to the variable.
   class Capture < Block
-    include ParserSwitching
-
     Syntax = /(#{VariableSignature}+)/o
 
-    attr_reader :to
-
     def initialize(tag_name, markup, options)
       super
-      parse_with_selected_parser(markup)
-    end
-
-    def lax_parse(markup)
       if markup =~ Syntax
         @to = Regexp.last_match(1)
       else
@@ -39,16 +27,6 @@ module Liquid
       end
     end
 
-    def strict_parse(markup)
-      lax_parse(markup)
-    end
-
-    def strict2_parse(markup)
-      p = @parse_context.new_parser(markup.strip)
-      @to = p.consume(:id)
-      p.consume(:end_of_string)
-    end
-
     def render_to_output_buffer(context, output)
       context.resource_limits.with_capture do
         capture_output = render(context)
@@ -61,4 +39,6 @@ module Liquid
       true
     end
   end
+
+  Template.register_tag('capture', Capture)
 end

lib/liquid/tags/case.rb

@@ -31,7 +31,12 @@ module Liquid
     def initialize(tag_name, markup, options)
       super
       @blocks = []
-      parse_with_selected_parser(markup)
+
+      if markup =~ Syntax
+        @left = parse_expression(Regexp.last_match(1))
+      else
+        raise SyntaxError, options[:locale].t("errors.syntax.case")
+      end
     end
 
     def parse(tokens)
@@ -72,7 +77,7 @@ module Liquid
         end
 
         result = Liquid::Utils.to_liquid_value(
-          block.evaluate(context),
+          block.evaluate(context)
         )
 
         if result
@@ -86,50 +91,9 @@ module Liquid
 
     private
 
-    def strict2_parse(markup)
-      parser = @parse_context.new_parser(markup)
-      @left = safe_parse_expression(parser)
-      parser.consume(:end_of_string)
-    end
-
-    def strict_parse(markup)
-      lax_parse(markup)
-    end
-
-    def lax_parse(markup)
-      if markup =~ Syntax
-        @left = parse_expression(Regexp.last_match(1))
-      else
-        raise SyntaxError, options[:locale].t("errors.syntax.case")
-      end
-    end
-
     def record_when_condition(markup)
       body = new_body
 
-      if strict2_mode?
-        parse_strict2_when(markup, body)
-      else
-        parse_lax_when(markup, body)
-      end
-    end
-
-    def parse_strict2_when(markup, body)
-      parser = @parse_context.new_parser(markup)
-
-      loop do
-        expr = Condition.parse_expression(parse_context, parser.expression, safe: true)
-        block = Condition.new(@left, '==', expr)
-        block.attach(body)
-        @blocks << block
-
-        break unless parser.id?('or') || parser.consume?(:comma)
-      end
-
-      parser.consume(:end_of_string)
-    end
-
-    def parse_lax_when(markup, body)
       while markup
         unless markup =~ WhenSyntax
           raise SyntaxError, options[:locale].t("errors.syntax.case_invalid_when")
@@ -159,4 +123,6 @@ module Liquid
       end
     end
   end
+
+  Template.register_tag('case', Case)
 end

lib/liquid/tags/comment.rb

@@ -25,64 +25,7 @@ module Liquid
     def blank?
       true
     end
-
-    private
-
-    def parse_body(body, tokenizer)
-      if parse_context.depth >= MAX_DEPTH
-        raise StackLevelError, "Nesting too deep"
-      end
-
-      parse_context.depth += 1
-      comment_tag_depth = 1
-
-      begin
-        # Consume tokens without creating child nodes.
-        # The children tag doesn't require to be a valid Liquid except the comment and raw tag.
-        # The child comment and raw tag must be closed.
-        while (token = tokenizer.send(:shift))
-          tag_name = if tokenizer.for_liquid_tag
-            next if token.empty? || token.match?(BlockBody::WhitespaceOrNothing)
-
-            tag_name_match = BlockBody::LiquidTagToken.match(token)
-
-            next if tag_name_match.nil?
-
-            tag_name_match[1]
-          else
-            token =~ BlockBody::FullToken
-            Regexp.last_match(2)
-          end
-
-          case tag_name
-          when "raw"
-            parse_raw_tag_body(tokenizer)
-          when "comment"
-            comment_tag_depth += 1
-          when "endcomment"
-            comment_tag_depth -= 1
-          end
-
-          if comment_tag_depth.zero?
-            parse_context.trim_whitespace = (token[-3] == WhitespaceControl) unless tokenizer.for_liquid_tag
-            return false
-          end
-        end
-
-        raise_tag_never_closed(block_name)
-      ensure
-        parse_context.depth -= 1
-      end
-
-      false
-    end
-
-    def parse_raw_tag_body(tokenizer)
-      while (token = tokenizer.send(:shift))
-        return if token =~ BlockBody::FullTokenPossiblyInvalid && "endraw" == Regexp.last_match(2)
-      end
-
-      raise_tag_never_closed("raw")
-    end
   end
+
+  Template.register_tag('comment', Comment)
 end

lib/liquid/tags/continue.rb

@@ -6,7 +6,7 @@ module Liquid
   # @liquid_category iteration
   # @liquid_name continue
   # @liquid_summary
-  #   Causes a [`for` loop](/docs/api/liquid/tags/for) to skip to the next iteration.
+  #   Causes a [`for` loop](/api/liquid/tags/for) to skip to the next iteration.
   # @liquid_syntax
   #   {% continue %}
   class Continue < Tag
@@ -17,4 +17,6 @@ module Liquid
       output
     end
   end
+
+  Template.register_tag('continue', Continue)
 end

lib/liquid/tags/cycle.rb

@@ -6,7 +6,7 @@ module Liquid
   # @liquid_category iteration
   # @liquid_name cycle
   # @liquid_summary
-  #   Loops through a group of strings and outputs them one at a time for each iteration of a [`for` loop](/docs/api/liquid/tags/for).
+  #   Loops through a group of strings and outputs them one at a time for each iteration of a [`for` loop](/api/liquid/tags/for).
   # @liquid_description
   #   The `cycle` tag must be used inside a `for` loop.
   #
@@ -17,17 +17,21 @@ module Liquid
   class Cycle < Tag
     SimpleSyntax = /\A#{QuotedFragment}+/o
     NamedSyntax  = /\A(#{QuotedFragment})\s*\:\s*(.*)/om
-    UNNAMED_CYCLE_PATTERN = /\w+:0x\h{8}/
 
     attr_reader :variables
 
     def initialize(tag_name, markup, options)
       super
-      parse_with_selected_parser(markup)
-    end
-
-    def named?
-      @is_named
+      case markup
+      when NamedSyntax
+        @variables = variables_from_string(Regexp.last_match(2))
+        @name      = parse_expression(Regexp.last_match(1))
+      when SimpleSyntax
+        @variables = variables_from_string(markup)
+        @name      = @variables.to_s
+      else
+        raise SyntaxError, options[:locale].t("errors.syntax.cycle")
+      end
     end
 
     def render_to_output_buffer(context, output)
@@ -55,86 +59,19 @@ module Liquid
 
     private
 
-    # cycle [name:] expression(, expression)*
-    def strict2_parse(markup)
-      p = @parse_context.new_parser(markup)
-
-      @variables = []
-
-      raise SyntaxError, options[:locale].t("errors.syntax.cycle") if p.look(:end_of_string)
-
-      first_expression = safe_parse_expression(p)
-      if p.look(:colon)
-        # cycle name: expr1, expr2, ...
-        @name = first_expression
-        @is_named = true
-        p.consume(:colon)
-        # After the colon, parse the first variable (required for named cycles)
-        @variables << maybe_dup_lookup(safe_parse_expression(p))
-      else
-        # cycle expr1, expr2, ...
-        @variables << maybe_dup_lookup(first_expression)
-      end
-
-      # Parse remaining comma-separated expressions
-      while p.consume?(:comma)
-        break if p.look(:end_of_string)
-
-        @variables << maybe_dup_lookup(safe_parse_expression(p))
-      end
-
-      p.consume(:end_of_string)
-
-      unless @is_named
-        @name = @variables.to_s
-        @is_named = !@name.match?(UNNAMED_CYCLE_PATTERN)
-      end
-    end
-
-    def strict_parse(markup)
-      lax_parse(markup)
-    end
-
-    def lax_parse(markup)
-      case markup
-      when NamedSyntax
-        @variables = variables_from_string(Regexp.last_match(2))
-        @name      = parse_expression(Regexp.last_match(1))
-        @is_named = true
-      when SimpleSyntax
-        @variables = variables_from_string(markup)
-        @name      = @variables.to_s
-        @is_named = !@name.match?(UNNAMED_CYCLE_PATTERN)
-      else
-        raise SyntaxError, options[:locale].t("errors.syntax.cycle")
-      end
-    end
-
     def variables_from_string(markup)
       markup.split(',').collect do |var|
         var =~ /\s*(#{QuotedFragment})\s*/o
-        next unless Regexp.last_match(1)
-
-        var = parse_expression(Regexp.last_match(1))
-        maybe_dup_lookup(var)
+        Regexp.last_match(1) ? parse_expression(Regexp.last_match(1)) : nil
       end.compact
     end
 
-    # For backwards compatibility, whenever a lookup is used in an unnamed cycle,
-    # we make it so that the @variables.to_s produces different strings for cycles
-    # called with the same arguments (since @variables.to_s is used as the cycle counter key)
-    # This makes it so {% cycle a, b %} and {% cycle a, b %} have independent counters even if a and b share value.
-    # This is not true for literal values, {% cycle "a", "b" %} and {% cycle "a", "b" %} share the same counter.
-    # I was really scratching my head about this one, but migrating away from this would be more headache
-    # than it's worth. So we're keeping this quirk for now.
-    def maybe_dup_lookup(var)
-      var.is_a?(VariableLookup) ? var.dup : var
-    end
-
     class ParseTreeVisitor < Liquid::ParseTreeVisitor
       def children
         Array(@node.variables)
       end
     end
   end
+
+  Template.register_tag('cycle', Cycle)
 end

lib/liquid/tags/decrement.rb

@@ -7,45 +7,25 @@ module Liquid
   # @liquid_name decrement
   # @liquid_summary
   #   Creates a new variable, with a default value of -1, that's decreased by 1 with each subsequent call.
-  #
-  #   > Caution:
-  #   > Predefined Liquid objects can be overridden by variables with the same name.
-  #   > To make sure that you can access all Liquid objects, make sure that your variable name doesn't match a predefined object's name.
   # @liquid_description
   #   Variables that are declared with `decrement` are unique to the [layout](/themes/architecture/layouts), [template](/themes/architecture/templates),
   #   or [section](/themes/architecture/sections) file that they're created in. However, the variable is shared across
-  #   [snippets](/themes/architecture/snippets) included in the file.
+  #   [snippets](/themes/architecture#snippets) included in the file.
   #
-  #   Similarly, variables that are created with `decrement` are independent from those created with [`assign`](/docs/api/liquid/tags/assign)
-  #   and [`capture`](/docs/api/liquid/tags/capture). However, `decrement` and [`increment`](/docs/api/liquid/tags/increment) share
+  #   Similarly, variables that are created with `decrement` are independent from those created with [`assign`](/api/liquid/tags/assign)
+  #   and [`capture`](/api/liquid/tags/capture). However, `decrement` and [`increment`](/api/liquid/tags/increment) share
   #   variables.
   # @liquid_syntax
   #   {% decrement variable_name %}
   # @liquid_syntax_keyword variable_name The name of the variable being decremented.
   class Decrement < Tag
-    include ParserSwitching
-
     attr_reader :variable_name
 
     def initialize(tag_name, markup, options)
       super
-      parse_with_selected_parser(markup)
-    end
-
-    def lax_parse(markup)
       @variable_name = markup.strip
     end
 
-    def strict_parse(markup)
-      lax_parse(markup)
-    end
-
-    def strict2_parse(markup)
-      p = @parse_context.new_parser(markup.strip)
-      @variable_name = p.consume(:id)
-      p.consume(:end_of_string)
-    end
-
     def render_to_output_buffer(context, output)
       counter_environment = context.environments.first
       value = counter_environment[@variable_name] || 0
@@ -55,4 +35,6 @@ module Liquid
       output
     end
   end
+
+  Template.register_tag('decrement', Decrement)
 end

lib/liquid/tags/doc.rb

@@ -1,81 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  # @liquid_public_docs
-  # @liquid_type tag
-  # @liquid_category syntax
-  # @liquid_name doc
-  # @liquid_summary
-  #   Documents template elements with annotations.
-  # @liquid_description
-  #   The `doc` tag allows developers to include documentation within Liquid
-  #   templates. Any content inside `doc` tags is not rendered or outputted.
-  #   Liquid code inside will be parsed but not executed. This facilitates
-  #   tooling support for features like code completion, linting, and inline
-  #   documentation.
-  #
-  #   For detailed documentation syntax and examples, see the
-  #   [`LiquidDoc` reference](/docs/storefronts/themes/tools/liquid-doc).
-  #
-  # @liquid_syntax
-  #   {% doc %}
-  #     Renders a message.
-  #
-  #     @param {string} foo - A string value.
-  #     @param {string} [bar] - An optional string value.
-  #
-  #     @example
-  #     {% render 'message', foo: 'Hello', bar: 'World' %}
-  #   {% enddoc %}
-  class Doc < Block
-    NO_UNEXPECTED_ARGS = /\A\s*\z/
-
-    def initialize(tag_name, markup, parse_context)
-      super
-      ensure_valid_markup(tag_name, markup, parse_context)
-    end
-
-    def parse(tokens)
-      @body = +""
-
-      while (token = tokens.shift)
-        tag_name = token =~ BlockBody::FullTokenPossiblyInvalid && Regexp.last_match(2)
-
-        raise_nested_doc_error if tag_name == @tag_name
-
-        if tag_name == block_delimiter
-          parse_context.trim_whitespace = (token[-3] == WhitespaceControl)
-          @body << Regexp.last_match(1) if Regexp.last_match(1) != ""
-          return
-        end
-        @body << token unless token.empty?
-      end
-
-      raise_tag_never_closed(block_name)
-    end
-
-    def render_to_output_buffer(_context, output)
-      output
-    end
-
-    def blank?
-      @body.empty?
-    end
-
-    def nodelist
-      [@body]
-    end
-
-    private
-
-    def ensure_valid_markup(tag_name, markup, parse_context)
-      unless NO_UNEXPECTED_ARGS.match?(markup)
-        raise SyntaxError, parse_context.locale.t("errors.syntax.block_tag_unexpected_args", tag: tag_name)
-      end
-    end
-
-    def raise_nested_doc_error
-      raise SyntaxError, parse_context.locale.t("errors.syntax.doc_invalid_nested")
-    end
-  end
-end

lib/liquid/tags/echo.rb

@@ -9,10 +9,10 @@ module Liquid
   #   Outputs an expression.
   # @liquid_description
   #   Using the `echo` tag is the same as wrapping an expression in curly brackets (`{{` and `}}`). However, unlike the curly
-  #   bracket method, you can use the `echo` tag inside [`liquid` tags](/docs/api/liquid/tags/liquid).
+  #   bracket method, you can use the `echo` tag inside [`liquid` tags](/api/liquid/tags/liquid).
   #
   #   > Tip:
-  #   > You can use [filters](/docs/api/liquid/filters) on expressions inside `echo` tags.
+  #   > You can use [filters](/api/liquid/filters) on expressions inside `echo` tags.
   # @liquid_syntax
   #   {% liquid
   #     echo expression
@@ -36,4 +36,6 @@ module Liquid
       end
     end
   end
+
+  Template.register_tag('echo', Echo)
 end

lib/liquid/tags/for.rb

@@ -9,10 +9,10 @@ module Liquid
   #   Renders an expression for every item in an array.
   # @liquid_description
   #   You can do a maximum of 50 iterations with a `for` loop. If you need to iterate over more than 50 items, then use the
-  #   [`paginate` tag](/docs/api/liquid/tags/paginate) to split the items over multiple pages.
+  #   [`paginate` tag](/api/liquid/tags/paginate) to split the items over multiple pages.
   #
   #   > Tip:
-  #   > Every `for` loop has an associated [`forloop` object](/docs/api/liquid/objects/forloop) with information about the loop.
+  #   > Every `for` loop has an associated [`forloop` object](/api/liquid/objects/forloop) with information about the loop.
   # @liquid_syntax
   #   {% for variable in array %}
   #     expression
@@ -20,8 +20,8 @@ module Liquid
   # @liquid_syntax_keyword variable The current item in the array.
   # @liquid_syntax_keyword array The array to iterate over.
   # @liquid_syntax_keyword expression The expression to render for each iteration.
-  # @liquid_optional_param limit: [number] The number of iterations to perform.
-  # @liquid_optional_param offset: [number] The 1-based index to start iterating at.
+  # @liquid_optional_param limit [number] The number of iterations to perform.
+  # @liquid_optional_param offset [number] The 1-based index to start iterating at.
   # @liquid_optional_param range [untyped] A custom numeric range to iterate over.
   # @liquid_optional_param reversed [untyped] Iterate in reverse order.
   class For < Block
@@ -38,10 +38,15 @@ module Liquid
     end
 
     def parse(tokens)
-      parse_context.with_lexical_scope do
-        parse_loop(tokens)
-        @has_local_declarations = parse_context.local_declarations?
+      if parse_body(@for_block, tokens)
+        parse_body(@else_block, tokens)
       end
+      if blank?
+        @else_block&.remove_blank_strings
+        @for_block.remove_blank_strings
+      end
+      @else_block&.freeze
+      @for_block.freeze
     end
 
     def nodelist
@@ -83,14 +88,14 @@ module Liquid
     end
 
     def strict_parse(markup)
-      p = @parse_context.new_parser(markup)
+      p = Parser.new(markup)
       @variable_name = p.consume(:id)
       raise SyntaxError, options[:locale].t("errors.syntax.for_invalid_in") unless p.id?('in')
 
-      collection_name, collection_markup = p.expression_with_markup
-      @collection_name = parse_expression(collection_name, safe: true)
+      collection_name  = p.expression
+      @collection_name = parse_expression(collection_name)
 
-      @name     = "#{@variable_name}-#{collection_markup}"
+      @name     = "#{@variable_name}-#{collection_name}"
       @reversed = p.id?('reversed')
 
       while p.look(:comma) || p.look(:id)
@@ -99,29 +104,13 @@ module Liquid
           raise SyntaxError, options[:locale].t("errors.syntax.for_invalid_attribute")
         end
         p.consume(:colon)
-        set_attribute(attribute, p.expression, safe: true)
+        set_attribute(attribute, p.expression)
       end
       p.consume(:end_of_string)
     end
 
     private
 
-    def parse_loop(tokens)
-      if parse_body(@for_block, tokens)
-        parse_body(@else_block, tokens)
-      end
-      if blank?
-        @else_block&.remove_blank_strings
-        @for_block.remove_blank_strings
-      end
-      @else_block&.freeze
-      @for_block.freeze
-    end
-
-    def strict2_parse(markup)
-      strict_parse(markup)
-    end
-
     def collection_segment(context)
       offsets = context.registers[:for] ||= {}
 
@@ -168,7 +157,7 @@ module Liquid
 
           segment.each do |item|
             context[@variable_name] = item
-            render_iteration(context, output)
+            @for_block.render_to_output_buffer(context, output)
             loop_vars.send(:increment!)
 
             # Handle any interrupts if they exist.
@@ -185,30 +174,25 @@ module Liquid
       output
     end
 
-    def render_iteration(context, output)
-      return @for_block.render_to_output_buffer(context, output) unless @has_local_declarations
-
-      context.stack { @for_block.render_to_output_buffer(context, output) }
-    end
-
-    def set_attribute(key, expr, safe: false)
+    def set_attribute(key, expr)
       case key
       when 'offset'
         @from = if expr == 'continue'
           :continue
         else
-          parse_expression(expr, safe: safe)
+          parse_expression(expr)
         end
       when 'limit'
-        @limit = parse_expression(expr, safe: safe)
+        @limit = parse_expression(expr)
       end
     end
 
     def render_else(context, output)
-      return output unless @else_block
-      return @else_block.render_to_output_buffer(context, output) unless @has_local_declarations
-
-      context.stack { @else_block.render_to_output_buffer(context, output) }
+      if @else_block
+        @else_block.render_to_output_buffer(context, output)
+      else
+        output
+      end
     end
 
     class ParseTreeVisitor < Liquid::ParseTreeVisitor
@@ -217,4 +201,6 @@ module Liquid
       end
     end
   end
+
+  Template.register_tag('for', For)
 end

lib/liquid/tags/if.rb

@@ -53,7 +53,7 @@ module Liquid
     def render_to_output_buffer(context, output)
       @blocks.each do |block|
         result = Liquid::Utils.to_liquid_value(
-          block.evaluate(context),
+          block.evaluate(context)
         )
 
         if result
@@ -66,10 +66,6 @@ module Liquid
 
     private
 
-    def strict2_parse(markup)
-      strict_parse(markup)
-    end
-
     def push_block(tag, markup)
       block = if tag == 'else'
         ElseCondition.new
@@ -81,8 +77,8 @@ module Liquid
       block.attach(new_body)
     end
 
-    def parse_expression(markup, safe: false)
-      Condition.parse_expression(parse_context, markup, safe: safe)
+    def parse_expression(markup)
+      Condition.parse_expression(parse_context, markup)
     end
 
     def lax_parse(markup)
@@ -106,7 +102,7 @@ module Liquid
     end
 
     def strict_parse(markup)
-      p = @parse_context.new_parser(markup)
+      p = Parser.new(markup)
       condition = parse_binary_comparisons(p)
       p.consume(:end_of_string)
       condition
@@ -115,7 +111,7 @@ module Liquid
     def parse_binary_comparisons(p)
       condition = parse_comparison(p)
       first_condition = condition
-      while (op = p.id?('and') || p.id?('or'))
+      while (op = (p.id?('and') || p.id?('or')))
         child_condition = parse_comparison(p)
         condition.send(op, child_condition)
         condition = child_condition
@@ -124,9 +120,9 @@ module Liquid
     end
 
     def parse_comparison(p)
-      a = parse_expression(p.expression, safe: true)
+      a = parse_expression(p.expression)
       if (op = p.consume?(:comparison))
-        b = parse_expression(p.expression, safe: true)
+        b = parse_expression(p.expression)
         Condition.new(a, op, b)
       else
         Condition.new(a)
@@ -139,4 +135,6 @@ module Liquid
       end
     end
   end
+
+  Template.register_tag('if', If)
 end

lib/liquid/tags/ifchanged.rb

@@ -14,4 +14,6 @@ module Liquid
       output
     end
   end
+
+  Template.register_tag('ifchanged', Ifchanged)
 end

lib/liquid/tags/include.rb

@@ -6,9 +6,9 @@ module Liquid
   # @liquid_category theme
   # @liquid_name include
   # @liquid_summary
-  #   Renders a [snippet](/themes/architecture/snippets).
+  #   Renders a [snippet](/themes/architecture#snippets).
   # @liquid_description
-  #   Inside the snippet, you can access and alter variables that are [created](/docs/api/liquid/tags/variable-tags) outside of the
+  #   Inside the snippet, you can access and alter variables that are [created](/api/liquid/tags/variable-tags) outside of the
   #   snippet.
   # @liquid_syntax
   #   {% include 'filename' %}
@@ -16,19 +16,35 @@ module Liquid
   # @liquid_deprecated
   #   Deprecated because the way that variables are handled reduces performance and makes code harder to both read and maintain.
   #
-  #   The `include` tag has been replaced by [`render`](/docs/api/liquid/tags/render).
+  #   The `include` tag has been replaced by [`render`](/api/liquid/tags/render).
   class Include < Tag
     prepend Tag::Disableable
 
-    FOR = 'for'
-    SYNTAX = /(#{QuotedFragment}+)(\s+(with|#{FOR})\s+(#{QuotedFragment}+))?(\s+(?:as)\s+(#{VariableSegment}+))?/o
+    SYNTAX = /(#{QuotedFragment}+)(\s+(?:with|for)\s+(#{QuotedFragment}+))?(\s+(?:as)\s+(#{VariableSegment}+))?/o
     Syntax = SYNTAX
 
     attr_reader :template_name_expr, :variable_name_expr, :attributes
 
     def initialize(tag_name, markup, options)
       super
-      parse_with_selected_parser(markup)
+
+      if markup =~ SYNTAX
+
+        template_name = Regexp.last_match(1)
+        variable_name = Regexp.last_match(3)
+
+        @alias_name         = Regexp.last_match(5)
+        @variable_name_expr = variable_name ? parse_expression(variable_name) : nil
+        @template_name_expr = parse_expression(template_name)
+        @attributes         = {}
+
+        markup.scan(TagAttributes) do |key, value|
+          @attributes[key] = parse_expression(value)
+        end
+
+      else
+        raise SyntaxError, options[:locale].t("errors.syntax.include")
+      end
     end
 
     def parse(_tokens)
@@ -41,7 +57,7 @@ module Liquid
       partial = PartialCache.load(
         template_name,
         context: context,
-        parse_context: parse_context,
+        parse_context: parse_context
       )
 
       context_variable_name = @alias_name || template_name.split('/').last
@@ -54,11 +70,9 @@ module Liquid
 
       old_template_name = context.template_name
       old_partial       = context.partial
-
       begin
-        context.template_name = partial.name
-        context.partial = true
-
+        context.template_name = template_name
+        context.partial       = true
         context.stack do
           @attributes.each do |key, value|
             context[key] = context.evaluate(value)
@@ -85,57 +99,6 @@ module Liquid
     alias_method :parse_context, :options
     private :parse_context
 
-    def for_loop?
-      @is_for_loop
-    end
-
-    def strict2_parse(markup)
-      p = @parse_context.new_parser(markup)
-
-      @template_name_expr = safe_parse_expression(p)
-      with_or_for         = p.id?("for") || p.id?("with")
-      @variable_name_expr = safe_parse_expression(p) if with_or_for
-      @alias_name         = p.consume(:id) if p.id?("as")
-      @is_for_loop        = (with_or_for == FOR)
-
-      p.consume?(:comma)
-
-      @attributes = {}
-      while p.look(:id)
-        key = p.consume
-        p.consume(:colon)
-        @attributes[key] = safe_parse_expression(p)
-        p.consume?(:comma)
-      end
-
-      p.consume(:end_of_string)
-    end
-
-    def strict_parse(markup)
-      lax_parse(markup)
-    end
-
-    def lax_parse(markup)
-      if markup =~ SYNTAX
-        template_name = Regexp.last_match(1)
-        with_or_for   = Regexp.last_match(3)
-        variable_name = Regexp.last_match(4)
-
-        @alias_name         = Regexp.last_match(6)
-        @variable_name_expr = variable_name ? parse_expression(variable_name) : nil
-        @template_name_expr = parse_expression(template_name)
-        @is_for_loop        = (with_or_for == FOR)
-        @attributes         = {}
-
-        markup.scan(TagAttributes) do |key, value|
-          @attributes[key] = parse_expression(value)
-        end
-
-      else
-        raise SyntaxError, options[:locale].t("errors.syntax.include")
-      end
-    end
-
     class ParseTreeVisitor < Liquid::ParseTreeVisitor
       def children
         [
@@ -145,4 +108,6 @@ module Liquid
       end
     end
   end
+
+  Template.register_tag('include', Include)
 end

lib/liquid/tags/increment.rb

@@ -7,45 +7,25 @@ module Liquid
   # @liquid_name increment
   # @liquid_summary
   #   Creates a new variable, with a default value of 0, that's increased by 1 with each subsequent call.
-  #
-  #   > Caution:
-  #   > Predefined Liquid objects can be overridden by variables with the same name.
-  #   > To make sure that you can access all Liquid objects, make sure that your variable name doesn't match a predefined object's name.
   # @liquid_description
   #   Variables that are declared with `increment` are unique to the [layout](/themes/architecture/layouts), [template](/themes/architecture/templates),
   #   or [section](/themes/architecture/sections) file that they're created in. However, the variable is shared across
-  #   [snippets](/themes/architecture/snippets) included in the file.
+  #   [snippets](/themes/architecture#snippets) included in the file.
   #
-  #   Similarly, variables that are created with `increment` are independent from those created with [`assign`](/docs/api/liquid/tags/assign)
-  #   and [`capture`](/docs/api/liquid/tags/capture). However, `increment` and [`decrement`](/docs/api/liquid/tags/decrement) share
+  #   Similarly, variables that are created with `increment` are independent from those created with [`assign`](/api/liquid/tags/assign)
+  #   and [`capture`](/api/liquid/tags/capture). However, `increment` and [`decrement`](/api/liquid/tags/decrement) share
   #   variables.
   # @liquid_syntax
   #   {% increment variable_name %}
   # @liquid_syntax_keyword variable_name The name of the variable being incremented.
   class Increment < Tag
-    include ParserSwitching
-
     attr_reader :variable_name
 
     def initialize(tag_name, markup, options)
       super
-      parse_with_selected_parser(markup)
-    end
-
-    def lax_parse(markup)
       @variable_name = markup.strip
     end
 
-    def strict_parse(markup)
-      lax_parse(markup)
-    end
-
-    def strict2_parse(markup)
-      p = @parse_context.new_parser(markup.strip)
-      @variable_name = p.consume(:id)
-      p.consume(:end_of_string)
-    end
-
     def render_to_output_buffer(context, output)
       counter_environment = context.environments.first
       value = counter_environment[@variable_name] || 0
@@ -55,4 +35,6 @@ module Liquid
       output
     end
   end
+
+  Template.register_tag('increment', Increment)
 end

lib/liquid/tags/inline_comment.rb

@@ -25,4 +25,6 @@ module Liquid
       true
     end
   end
+
+  Template.register_tag('#', InlineComment)
 end

lib/liquid/tags/let.rb

@@ -1,54 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  class Let < Block
-    attr_reader :to, :from, :parameters, :closure_body
-
-    def initialize(tag_name, markup, parse_context)
-      super
-      parse_context.require_closures!
-      parser = parse_context.new_parser(markup)
-      @to = parser.consume(:id)
-      if parser.consume?(:assign)
-        raise SyntaxError, "Expected let initializer" if parser.look(:end_of_string)
-
-        @from = Variable.new(parser, parse_context)
-      else
-        @parameters = parser.parameters.freeze
-        parser.consume(:end_of_string)
-      end
-      parse_context.declare_local(@to)
-    end
-
-    def parse(tokens)
-      return unless body_form?
-
-      @closure_body = parse_closure_body(tokens, parameters: @parameters)
-    end
-
-    def body_form?
-      @from.nil?
-    end
-
-    def nodelist
-      body_form? ? super : Const::EMPTY_ARRAY
-    end
-
-    def render_to_output_buffer(context, output)
-      value = body_form? ? @closure_body.bind(context) : @from.render(context)
-      context.resource_limits.increment_assign_score(Assign.assign_score_of(value))
-      context[@to] = value
-      output
-    end
-
-    def blank?
-      true
-    end
-
-    class ParseTreeVisitor < Liquid::ParseTreeVisitor
-      def children
-        @node.body_form? ? [@node.closure_body] : [@node.from]
-      end
-    end
-  end
-end

lib/liquid/tags/raw.rb

@@ -14,6 +14,7 @@ module Liquid
   # @liquid_syntax_keyword expression The expression to be output without being rendered.
   class Raw < Block
     Syntax = /\A\s*\z/
+    FullTokenPossiblyInvalid = /\A(.*)#{TagStart}\s*(\w+)\s*(.*)?#{TagEnd}\z/om
 
     def initialize(tag_name, markup, parse_context)
       super
@@ -24,8 +25,7 @@ module Liquid
     def parse(tokens)
       @body = +''
       while (token = tokens.shift)
-        if token =~ BlockBody::FullTokenPossiblyInvalid && block_delimiter == Regexp.last_match(2)
-          parse_context.trim_whitespace = (token[-3] == WhitespaceControl)
+        if token =~ FullTokenPossiblyInvalid && block_delimiter == Regexp.last_match(2)
           @body << Regexp.last_match(1) if Regexp.last_match(1) != ""
           return
         end
@@ -56,4 +56,6 @@ module Liquid
       end
     end
   end
+
+  Template.register_tag('raw', Raw)
 end

lib/liquid/tags/render.rb

@@ -6,21 +6,21 @@ module Liquid
   # @liquid_category theme
   # @liquid_name render
   # @liquid_summary
-  #   Renders a [snippet](/themes/architecture/snippets) or [app block](/themes/architecture/sections/section-schema#render-app-blocks).
+  #   Renders a [snippet](/themes/architecture#snippets) or [app block](/themes/architecture/sections/section-schema#render-app-blocks).
   # @liquid_description
-  #   Inside snippets and app blocks, you can't directly access variables that are [created](/docs/api/liquid/tags/variable-tags) outside
-  #   of the snippet or app block. However, you can [specify variables as parameters](/docs/api/liquid/tags/render#render-passing-variables-to-a-snippet)
+  #   Inside snippets and app blocks, you can't directly access variables that are [created](/api/liquid/tags/variable-tags) outside
+  #   of the snippet or app block. However, you can [specify variables as parameters](/api/liquid/tags/render#render-passing-variables-to-a-snippet)
   #   to pass outside variables to snippets.
   #
   #   While you can't directly access created variables, you can access global objects, as well as any objects that are
   #   directly accessible outside the snippet or app block. For example, a snippet or app block inside the [product template](/themes/architecture/templates/product)
-  #   can access the [`product` object](/docs/api/liquid/objects/product), and a snippet or app block inside a [section](/themes/architecture/sections)
-  #   can access the [`section` object](/docs/api/liquid/objects/section).
+  #   can access the [`product` object](/api/liquid/objects/product), and a snippet or app block inside a [section](/themes/architecture/sections)
+  #   can access the [`section` object](/api/liquid/objects/section).
   #
   #   Outside a snippet or app block, you can't access variables created inside the snippet or app block.
   #
   #   > Note:
-  #   > When you render a snippet using the `render` tag, you can't use the [`include` tag](/docs/api/liquid/tags/include)
+  #   > When you render a snippet using the `render` tag, you can't use the [`include` tag](/api/liquid/tags/include)
   #   > inside the snippet.
   # @liquid_syntax
   #   {% render 'filename' %}
@@ -35,7 +35,22 @@ module Liquid
 
     def initialize(tag_name, markup, options)
       super
-      parse_with_selected_parser(markup)
+
+      raise SyntaxError, options[:locale].t("errors.syntax.render") unless markup =~ SYNTAX
+
+      template_name = Regexp.last_match(1)
+      with_or_for = Regexp.last_match(3)
+      variable_name = Regexp.last_match(4)
+
+      @alias_name = Regexp.last_match(6)
+      @variable_name_expr = variable_name ? parse_expression(variable_name) : nil
+      @template_name_expr = parse_expression(template_name)
+      @is_for_loop = (with_or_for == FOR)
+
+      @attributes = {}
+      markup.scan(TagAttributes) do |key, value|
+        @attributes[key] = parse_expression(value)
+      end
     end
 
     def for_loop?
@@ -54,14 +69,14 @@ module Liquid
       partial = PartialCache.load(
         template_name,
         context: context,
-        parse_context: parse_context,
+        parse_context: parse_context
       )
 
       context_variable_name = @alias_name || template_name.split('/').last
 
       render_partial_func = ->(var, forloop) {
         inner_context               = context.new_isolated_subcontext
-        inner_context.template_name = partial.name
+        inner_context.template_name = template_name
         inner_context.partial       = true
         inner_context['forloop']    = forloop if forloop
 
@@ -84,55 +99,6 @@ module Liquid
       output
     end
 
-    # render (string) (with|for expression)? (as id)? (key: value)*
-    def strict2_parse(markup)
-      p = @parse_context.new_parser(markup)
-
-      @template_name_expr = parse_expression(strict2_template_name(p), safe: true)
-      with_or_for         = p.id?("for") || p.id?("with")
-      @variable_name_expr = safe_parse_expression(p) if with_or_for
-      @alias_name         = p.consume(:id) if p.id?("as")
-      @is_for_loop        = (with_or_for == FOR)
-
-      p.consume?(:comma)
-
-      @attributes = {}
-      while p.look(:id)
-        key = p.consume
-        p.consume(:colon)
-        @attributes[key] = safe_parse_expression(p)
-        p.consume?(:comma)
-      end
-
-      p.consume(:end_of_string)
-    end
-
-    def strict2_template_name(p)
-      p.consume(:string)
-    end
-
-    def strict_parse(markup)
-      lax_parse(markup)
-    end
-
-    def lax_parse(markup)
-      raise SyntaxError, options[:locale].t("errors.syntax.render") unless markup =~ SYNTAX
-
-      template_name = Regexp.last_match(1)
-      with_or_for = Regexp.last_match(3)
-      variable_name = Regexp.last_match(4)
-
-      @alias_name = Regexp.last_match(6)
-      @variable_name_expr = variable_name ? parse_expression(variable_name) : nil
-      @template_name_expr = parse_expression(template_name)
-      @is_for_loop = (with_or_for == FOR)
-
-      @attributes = {}
-      markup.scan(TagAttributes) do |key, value|
-        @attributes[key] = parse_expression(value)
-      end
-    end
-
     class ParseTreeVisitor < Liquid::ParseTreeVisitor
       def children
         [
@@ -142,4 +108,6 @@ module Liquid
       end
     end
   end
+
+  Template.register_tag('render', Render)
 end

lib/liquid/tags/set.rb

@@ -1,39 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  class SetTag < Tag
-    attr_reader :to, :from
-
-    def initialize(tag_name, markup, parse_context)
-      super
-      parse_context.require_closures!
-      parser = parse_context.new_parser(markup)
-      @to = parser.consume(:id)
-      parser.consume(:assign)
-      raise SyntaxError, "Expected set initializer" if parser.look(:end_of_string)
-
-      @from = Variable.new(parser, parse_context)
-    end
-
-    def render_to_output_buffer(context, output)
-      value = if context.variable_defined?(@to)
-        @from.render(context)
-      else
-        context.stack(@to => nil) { @from.render(context) }
-      end
-      context.resource_limits.increment_assign_score(Assign.assign_score_of(value))
-      context.set_local(@to, value)
-      output
-    end
-
-    def blank?
-      true
-    end
-
-    class ParseTreeVisitor < Liquid::ParseTreeVisitor
-      def children
-        [@node.from]
-      end
-    end
-  end
-end

lib/liquid/tags/table_row.rb

@@ -11,7 +11,7 @@ module Liquid
   #   The `tablerow` tag must be wrapped in HTML `<table>` and `</table>` tags.
   #
   #   > Tip:
-  #   > Every `tablerow` loop has an associated [`tablerowloop` object](/docs/api/liquid/objects/tablerowloop) with information about the loop.
+  #   > Every `tablerow` loop has an associated [`tablerowloop` object](/api/liquid/objects/tablerowloop) with information about the loop.
   # @liquid_syntax
   #   {% tablerow variable in array %}
   #     expression
@@ -19,61 +19,17 @@ module Liquid
   # @liquid_syntax_keyword variable The current item in the array.
   # @liquid_syntax_keyword array The array to iterate over.
   # @liquid_syntax_keyword expression The expression to render.
-  # @liquid_optional_param cols: [number] The number of columns that the table should have.
-  # @liquid_optional_param limit: [number] The number of iterations to perform.
-  # @liquid_optional_param offset: [number] The 1-based index to start iterating at.
+  # @liquid_optional_param cols [number] The number of columns that the table should have.
+  # @liquid_optional_param limit [number] The number of iterations to perform.
+  # @liquid_optional_param offset [number] The 1-based index to start iterating at.
   # @liquid_optional_param range [untyped] A custom numeric range to iterate over.
   class TableRow < Block
     Syntax = /(\w+)\s+in\s+(#{QuotedFragment}+)/o
-    ALLOWED_ATTRIBUTES = ['cols', 'limit', 'offset', 'range'].freeze
 
     attr_reader :variable_name, :collection_name, :attributes
 
     def initialize(tag_name, markup, options)
       super
-      parse_with_selected_parser(markup)
-    end
-
-    def parse(tokens)
-      parse_context.with_lexical_scope do
-        super
-        @has_local_declarations = parse_context.local_declarations?
-      end
-    end
-
-    def strict2_parse(markup)
-      p = @parse_context.new_parser(markup)
-
-      @variable_name = p.consume(:id)
-
-      unless p.id?("in")
-        raise SyntaxError, options[:locale].t("errors.syntax.for_invalid_in")
-      end
-
-      @collection_name = safe_parse_expression(p)
-
-      p.consume?(:comma)
-
-      @attributes = {}
-      while p.look(:id)
-        key = p.consume
-        unless ALLOWED_ATTRIBUTES.include?(key)
-          raise SyntaxError, options[:locale].t("errors.syntax.table_row_invalid_attribute", attribute: key)
-        end
-
-        p.consume(:colon)
-        @attributes[key] = safe_parse_expression(p)
-        p.consume?(:comma)
-      end
-
-      p.consume(:end_of_string)
-    end
-
-    def strict_parse(markup)
-      lax_parse(markup)
-    end
-
-    def lax_parse(markup)
       if markup =~ Syntax
         @variable_name   = Regexp.last_match(1)
         @collection_name = parse_expression(Regexp.last_match(2))
@@ -89,13 +45,13 @@ module Liquid
     def render_to_output_buffer(context, output)
       (collection = context.evaluate(@collection_name)) || (return '')
 
-      from = @attributes.key?('offset') ? to_integer(context.evaluate(@attributes['offset'])) : 0
-      to = @attributes.key?('limit') ? from + to_integer(context.evaluate(@attributes['limit'])) : nil
+      from = @attributes.key?('offset') ? context.evaluate(@attributes['offset']).to_i : 0
+      to   = @attributes.key?('limit')  ? from + context.evaluate(@attributes['limit']).to_i : nil
 
       collection = Utils.slice_collection(collection, from, to)
       length     = collection.length
 
-      cols = @attributes.key?('cols') ? to_integer(context.evaluate(@attributes['cols'])) : length
+      cols = @attributes.key?('cols') ? context.evaluate(@attributes['cols']).to_i : length
 
       output << "<tr class=\"row1\">\n"
       context.stack do
@@ -106,19 +62,9 @@ module Liquid
           context[@variable_name] = item
 
           output << "<td class=\"col#{tablerowloop.col}\">"
-          if @has_local_declarations
-            context.stack { super }
-          else
-            super
-          end
+          super
           output << '</td>'
 
-          # Handle any interrupts if they exist.
-          if context.interrupt?
-            interrupt = context.pop_interrupt
-            break if interrupt.is_a?(BreakInterrupt)
-          end
-
           if tablerowloop.col_last && !tablerowloop.last
             output << "</tr>\n<tr class=\"row#{tablerowloop.row + 1}\">"
           end
@@ -136,13 +82,7 @@ module Liquid
         super + @node.attributes.values + [@node.collection_name]
       end
     end
-
-    private
-
-    def to_integer(value)
-      value.to_i
-    rescue NoMethodError
-      raise Liquid::ArgumentError, "invalid integer"
-    end
   end
+
+  Template.register_tag('tablerow', TableRow)
 end

lib/liquid/tags/unless.rb

@@ -11,7 +11,7 @@ module Liquid
   #   Renders an expression unless a specific condition is `true`.
   # @liquid_description
   #   > Tip:
-  #   > Similar to the [`if` tag](/docs/api/liquid/tags/if), you can use `elsif` to add more conditions to an `unless` tag.
+  #   > Similar to the [`if` tag](/api/liquid/tags/if), you can use `elsif` to add more conditions to an `unless` tag.
   # @liquid_syntax
   #   {% unless condition %}
   #     expression
@@ -23,7 +23,7 @@ module Liquid
       # First condition is interpreted backwards ( if not )
       first_block = @blocks.first
       result = Liquid::Utils.to_liquid_value(
-        first_block.evaluate(context),
+        first_block.evaluate(context)
       )
 
       unless result
@@ -33,7 +33,7 @@ module Liquid
       # After the first condition unless works just like if
       @blocks[1..-1].each do |block|
         result = Liquid::Utils.to_liquid_value(
-          block.evaluate(context),
+          block.evaluate(context)
         )
 
         if result
@@ -44,4 +44,6 @@ module Liquid
       output
     end
   end
+
+  Template.register_tag('unless', Unless)
 end

lib/liquid/template.rb

@@ -2,7 +2,7 @@
 
 module Liquid
   # Templates are central to liquid.
-  # Interpreting templates is a two step process. First you compile the
+  # Interpretating templates is a two step process. First you compile the
   # source code you got. During compile time some extensive error checking is performed.
   # your code should expect to get some SyntaxErrors.
   #
@@ -15,94 +15,98 @@ module Liquid
   #   template.render('user_name' => 'bob')
   #
   class Template
-    attr_accessor :root, :name
+    attr_accessor :root
     attr_reader :resource_limits, :warnings
 
+    class TagRegistry
+      include Enumerable
+
+      def initialize
+        @tags  = {}
+        @cache = {}
+      end
+
+      def [](tag_name)
+        return nil unless @tags.key?(tag_name)
+        return @cache[tag_name] if Liquid.cache_classes
+
+        lookup_class(@tags[tag_name]).tap { |o| @cache[tag_name] = o }
+      end
+
+      def []=(tag_name, klass)
+        @tags[tag_name]  = klass.name
+        @cache[tag_name] = klass
+      end
+
+      def delete(tag_name)
+        @tags.delete(tag_name)
+        @cache.delete(tag_name)
+      end
+
+      def each(&block)
+        @tags.each(&block)
+      end
+
+      private
+
+      def lookup_class(name)
+        Object.const_get(name)
+      end
+    end
+
     attr_reader :profiler
 
     class << self
       # Sets how strict the parser should be.
       # :lax acts like liquid 2.5 and silently ignores malformed tags in most cases.
       # :warn is the default and will give deprecation warnings when invalid syntax is used.
-      # :strict enforces correct syntax for most tags
-      # :strict2 enforces correct syntax for all tags
-      def error_mode=(mode)
-        Deprecations.warn("Template.error_mode=", "Environment#error_mode=")
-        Environment.default.error_mode = mode
+      # :strict will enforce correct syntax.
+      attr_accessor :error_mode
+      Template.error_mode = :lax
+
+      attr_accessor :default_exception_renderer
+      Template.default_exception_renderer = lambda do |exception|
+        exception
       end
 
-      def error_mode
-        Environment.default.error_mode
-      end
+      attr_accessor :file_system
+      Template.file_system = BlankFileSystem.new
 
-      def default_exception_renderer=(renderer)
-        Deprecations.warn("Template.default_exception_renderer=", "Environment#exception_renderer=")
-        Environment.default.exception_renderer = renderer
-      end
-
-      def default_exception_renderer
-        Environment.default.exception_renderer
-      end
-
-      def file_system=(file_system)
-        Deprecations.warn("Template.file_system=", "Environment#file_system=")
-        Environment.default.file_system = file_system
-      end
-
-      def file_system
-        Environment.default.file_system
-      end
-
-      def tags
-        Environment.default.tags
-      end
+      attr_accessor :tags
+      Template.tags = TagRegistry.new
+      private :tags=
 
       def register_tag(name, klass)
-        Deprecations.warn("Template.register_tag", "Environment#register_tag")
-        Environment.default.register_tag(name, klass)
+        tags[name.to_s] = klass
       end
 
       # Pass a module with filter methods which should be available
       # to all liquid views. Good for registering the standard library
       def register_filter(mod)
-        Deprecations.warn("Template.register_filter", "Environment#register_filter")
-        Environment.default.register_filter(mod)
+        StrainerFactory.add_global_filter(mod)
       end
 
-      private def default_resource_limits=(limits)
-        Deprecations.warn("Template.default_resource_limits=", "Environment#default_resource_limits=")
-        Environment.default.default_resource_limits = limits
-      end
-
-      def default_resource_limits
-        Environment.default.default_resource_limits
-      end
+      attr_accessor :default_resource_limits
+      Template.default_resource_limits = {}
+      private :default_resource_limits=
 
       # creates a new <tt>Template</tt> object from liquid source code
       # To enable profiling, pass in <tt>profile: true</tt> as an option.
       # See Liquid::Profiler for more information
       def parse(source, options = {})
-        environment = options[:environment] || Environment.default
-        new(environment: environment).parse(source, options)
+        new.parse(source, options)
       end
     end
 
-    def initialize(environment: Environment.default)
-      @environment = environment
+    def initialize
       @rethrow_errors  = false
-      @resource_limits = ResourceLimits.new(environment.default_resource_limits)
+      @resource_limits = ResourceLimits.new(Template.default_resource_limits)
     end
 
     # Parse source code.
     # Returns self for easy chaining
     def parse(source, options = {})
       parse_context = configure_options(options)
-      source = source.to_s.to_str
-
-      unless source.valid_encoding?
-        raise TemplateEncodingError, parse_context.locale.t("errors.syntax.invalid_template_encoding")
-      end
-
       tokenizer     = parse_context.new_tokenizer(source, start_line_number: @line_numbers && 1)
       @root         = Document.parse(tokenizer, parse_context)
       self
@@ -151,14 +155,12 @@ module Liquid
 
         c
       when Liquid::Drop
-        drop = args.shift
-        c    = Context.new([drop, assigns], instance_assigns, registers, @rethrow_errors, @resource_limits, {}, @environment)
-        drop.context = c if drop.respond_to?(:context=)
-        c
+        drop         = args.shift
+        drop.context = Context.new([drop, assigns], instance_assigns, registers, @rethrow_errors, @resource_limits)
       when Hash
-        Context.new([args.shift, assigns], instance_assigns, registers, @rethrow_errors, @resource_limits, {}, @environment)
+        Context.new([args.shift, assigns], instance_assigns, registers, @rethrow_errors, @resource_limits)
       when nil
-        Context.new(assigns, instance_assigns, registers, @rethrow_errors, @resource_limits, {}, @environment)
+        Context.new(assigns, instance_assigns, registers, @rethrow_errors, @resource_limits)
       else
         raise ArgumentError, "Expected Hash or Liquid::Context as parameter"
       end
@@ -187,22 +189,12 @@ module Liquid
         @profiler = context.profiler = Liquid::Profiler.new
       end
 
-      context.template_name ||= name
-
-      previous_error_mode = context.registers.static[:template_error_mode]
-      context.registers.static[:template_error_mode] = @error_mode
-
       begin
         # render the nodelist.
         @root.render_to_output_buffer(context, output || +'')
       rescue Liquid::MemoryError => e
         context.handle_error(e)
       ensure
-        if previous_error_mode
-          context.registers.static[:template_error_mode] = previous_error_mode
-        else
-          context.registers.static.delete(:template_error_mode)
-        end
         @errors = context.errors
       end
     end
@@ -226,15 +218,8 @@ module Liquid
       @options      = options
       @profiling    = profiling
       @line_numbers = options[:line_numbers] || @profiling
-      parse_context = if options.is_a?(ParseContext)
-        options
-      else
-        opts = options.key?(:environment) ? options : options.merge(environment: @environment)
-        ParseContext.new(opts)
-      end
-
-      @warnings = parse_context.warnings
-      @error_mode = parse_context.error_mode
+      parse_context = options.is_a?(ParseContext) ? options : ParseContext.new(options)
+      @warnings     = parse_context.warnings
       parse_context
     end
 

lib/liquid/tokenizer.rb

@@ -1,43 +1,20 @@
 # frozen_string_literal: true
 
-require "strscan"
-
 module Liquid
   class Tokenizer
     attr_reader :line_number, :for_liquid_tag
 
-    TAG_END = /%\}/
-    TAG_OR_VARIABLE_START = /\{[\{\%]/
-    NEWLINE = /\n/
-
-    OPEN_CURLEY = "{".ord
-    CLOSE_CURLEY = "}".ord
-    PERCENTAGE = "%".ord
-
-    def initialize(
-      source:,
-      string_scanner:,
-      line_numbers: false,
-      line_number: nil,
-      for_liquid_tag: false
-    )
-      @line_number = line_number || (line_numbers ? 1 : nil)
+    def initialize(source, line_numbers = false, line_number: nil, for_liquid_tag: false)
+      @source         = source.to_s.to_str
+      @line_number    = line_number || (line_numbers ? 1 : nil)
       @for_liquid_tag = for_liquid_tag
-      @source = source.to_s.to_str
-      @offset = 0
-      @tokens = []
-
-      if @source
-        @ss = string_scanner
-        @ss.string = @source
-        tokenize
-      end
+      @offset         = 0
+      @tokens         = tokenize
     end
 
     def shift
       token = @tokens[@offset]
-
-      return unless token
+      return nil unless token
 
       @offset += 1
 
@@ -51,111 +28,18 @@ module Liquid
     private
 
     def tokenize
-      if @for_liquid_tag
-        @tokens = @source.split("\n")
-      else
-        @tokens << shift_normal until @ss.eos?
+      return [] if @source.empty?
+
+      return @source.split("\n") if @for_liquid_tag
+
+      tokens = @source.split(TemplateParser)
+
+      # removes the rogue empty element at the beginning of the array
+      if tokens[0]&.empty?
+        @offset += 1
       end
 
-      @source = nil
-      @ss = nil
-    end
-
-    def shift_normal
-      token = next_token
-
-      return unless token
-
-      token
-    end
-
-    def next_token
-      # possible states: :text, :tag, :variable
-      byte_a = @ss.peek_byte
-
-      if byte_a == OPEN_CURLEY
-        @ss.scan_byte
-
-        byte_b = @ss.peek_byte
-
-        if byte_b == PERCENTAGE
-          @ss.scan_byte
-          return next_tag_token
-        elsif byte_b == OPEN_CURLEY
-          @ss.scan_byte
-          return next_variable_token
-        end
-
-        @ss.pos -= 1
-      end
-
-      next_text_token
-    end
-
-    def next_text_token
-      start = @ss.pos
-
-      unless @ss.skip_until(TAG_OR_VARIABLE_START)
-        token = @ss.rest
-        @ss.terminate
-        return token
-      end
-
-      pos = @ss.pos -= 2
-      @source.byteslice(start, pos - start)
-    rescue ::ArgumentError => e
-      if e.message == "invalid byte sequence in #{@ss.string.encoding}"
-        raise SyntaxError, "Invalid byte sequence in #{@ss.string.encoding}"
-      else
-        raise
-      end
-    end
-
-    def next_variable_token
-      start = @ss.pos - 2
-
-      byte_a = byte_b = @ss.scan_byte
-
-      while byte_b
-        byte_a = @ss.scan_byte while byte_a && byte_a != CLOSE_CURLEY && byte_a != OPEN_CURLEY
-
-        break unless byte_a
-
-        if @ss.eos?
-          return byte_a == CLOSE_CURLEY ? @source.byteslice(start, @ss.pos - start) : "{{"
-        end
-
-        byte_b = @ss.scan_byte
-
-        if byte_a == CLOSE_CURLEY
-          if byte_b == CLOSE_CURLEY
-            return @source.byteslice(start, @ss.pos - start)
-          elsif byte_b != CLOSE_CURLEY
-            @ss.pos -= 1
-            return @source.byteslice(start, @ss.pos - start)
-          end
-        elsif byte_a == OPEN_CURLEY && byte_b == PERCENTAGE
-          return next_tag_token_with_start(start)
-        end
-
-        byte_a = byte_b
-      end
-
-      "{{"
-    end
-
-    def next_tag_token
-      start = @ss.pos - 2
-      if (len = @ss.skip_until(TAG_END))
-        @source.byteslice(start, len + 2)
-      else
-        "{%"
-      end
-    end
-
-    def next_tag_token_with_start(start)
-      @ss.skip_until(TAG_END)
-      @source.byteslice(start, @ss.pos - start)
+      tokens
     end
   end
 end

lib/liquid/utils.rb

@@ -2,9 +2,6 @@
 
 module Liquid
   module Utils
-    DECIMAL_REGEX = /\A-?\d+\.\d+\z/
-    UNIX_TIMESTAMP_REGEX = /\A\d+\z/
-
     def self.slice_collection(collection, from, to)
       if (from != 0 || !to.nil?) && collection.respond_to?(:load_slice)
         collection.load_slice(from, to)
@@ -55,7 +52,7 @@ module Liquid
       when Numeric
         obj
       when String
-        DECIMAL_REGEX.match?(obj.strip) ? BigDecimal(obj) : obj.to_i
+        /\A-?\d+\.\d+\z/.match?(obj.strip) ? BigDecimal(obj) : obj.to_i
       else
         if obj.respond_to?(:to_number)
           obj.to_number
@@ -69,14 +66,14 @@ module Liquid
       return obj if obj.respond_to?(:strftime)
 
       if obj.is_a?(String)
-        return if obj.empty?
+        return nil if obj.empty?
         obj = obj.downcase
       end
 
       case obj
       when 'now', 'today'
         Time.now
-      when UNIX_TIMESTAMP_REGEX, Integer
+      when /\A\d+\z/, Integer
         Time.at(obj.to_i)
       when String
         Time.parse(obj)
@@ -92,103 +89,5 @@ module Liquid
       # Otherwise return the object itself
       obj
     end
-
-    def self.to_s(obj, seen = {})
-      case obj
-      when BigDecimal
-        obj.to_s("F")
-      when Hash
-        # If the custom hash implementation overrides `#to_s`, use their
-        # custom implementation. Otherwise we use Liquid's default
-        # implementation.
-        if obj.class.instance_method(:to_s) == HASH_TO_S_METHOD
-          hash_inspect(obj, seen)
-        else
-          obj.to_s
-        end
-      when Array
-        array_inspect(obj, seen)
-      else
-        obj.to_s
-      end
-    end
-
-    def self.inspect(obj, seen = {})
-      case obj
-      when Hash
-        # If the custom hash implementation overrides `#inspect`, use their
-        # custom implementation. Otherwise we use Liquid's default
-        # implementation.
-        if obj.class.instance_method(:inspect) == HASH_INSPECT_METHOD
-          hash_inspect(obj, seen)
-        else
-          obj.inspect
-        end
-      when Array
-        array_inspect(obj, seen)
-      else
-        obj.inspect
-      end
-    end
-
-    def self.array_inspect(arr, seen = {})
-      if seen[arr.object_id]
-        return "[...]"
-      end
-
-      seen[arr.object_id] = true
-      str = +"["
-      cursor = 0
-      len = arr.length
-
-      while cursor < len
-        if cursor > 0
-          str << ", "
-        end
-
-        item_str = inspect(arr[cursor], seen)
-        str << item_str
-        cursor += 1
-      end
-
-      str << "]"
-      str
-    ensure
-      seen.delete(arr.object_id)
-    end
-
-    def self.hash_inspect(hash, seen = {})
-      if seen[hash.object_id]
-        return "{...}"
-      end
-      seen[hash.object_id] = true
-
-      str = +"{"
-      first = true
-      hash.each do |key, value|
-        if first
-          first = false
-        else
-          str << ", "
-        end
-
-        key_str = inspect(key, seen)
-        str << key_str
-        str << "=>"
-
-        value_str = inspect(value, seen)
-        str << value_str
-      end
-      str << "}"
-      str
-    ensure
-      seen.delete(hash.object_id)
-    end
-
-    HASH_TO_S_METHOD = Hash.instance_method(:to_s)
-    private_constant :HASH_TO_S_METHOD
-
-    HASH_INSPECT_METHOD = Hash.instance_method(:inspect)
-    private_constant :HASH_INSPECT_METHOD
   end
 end

lib/liquid/variable.rb

@@ -25,7 +25,7 @@ module Liquid
     include ParserSwitching
 
     def initialize(markup, parse_context)
-      @markup        = markup.is_a?(Parser) ? markup.remaining_markup : markup
+      @markup        = markup
       @name          = nil
       @parse_context = parse_context
       @line_number   = parse_context.line_number
@@ -37,12 +37,7 @@ module Liquid
       @markup
     end
 
-    def ==(other)
-      self.class == other.class && name == other.name && filters == other.filters
-    end
-
     def markup_context(markup)
-      markup = @markup if markup.is_a?(Parser)
       "in \"{{#{markup}}}\""
     end
 
@@ -59,37 +54,26 @@ module Liquid
           next unless f =~ /\w+/
           filtername = Regexp.last_match(0)
           filterargs = f.scan(FilterArgsRegex).flatten
-          @filters << lax_parse_filter_expressions(filtername, filterargs)
+          @filters << parse_filter_expressions(filtername, filterargs)
         end
       end
     end
 
     def strict_parse(markup)
       @filters = []
-      p = @parse_context.new_parser(markup)
+      p = Parser.new(markup)
 
       return if p.look(:end_of_string)
 
-      @name = parse_context.safe_parse_expression(p)
+      @name = parse_context.parse_expression(p.expression)
       while p.consume?(:pipe)
         filtername = p.consume(:id)
-        filterargs = p.consume?(:colon) ? parse_filterargs(p) : Const::EMPTY_ARRAY
-        @filters << lax_parse_filter_expressions(filtername, filterargs)
+        filterargs = p.consume?(:colon) ? parse_filterargs(p) : []
+        @filters << parse_filter_expressions(filtername, filterargs)
       end
       p.consume(:end_of_string)
     end
 
-    def strict2_parse(markup)
-      @filters = []
-      p = markup.is_a?(Parser) ? markup : @parse_context.new_parser(markup)
-
-      return if p.look(:end_of_string)
-
-      @name = parse_context.safe_parse_expression(p)
-      @filters << strict2_parse_filter_expressions(p) while p.consume?(:pipe)
-      p.consume(:end_of_string)
-    end
-
     def parse_filterargs(p)
       # first argument
       filterargs = [p.argument]
@@ -110,26 +94,16 @@ module Liquid
     end
 
     def render_to_output_buffer(context, output)
-      if @name.is_a?(CallExpression) && @filters.empty? && context.global_filter.nil?
-        return @name.render_to_output_buffer(context, output)
-      end
-
       obj = render(context)
-      render_obj_to_output(obj, output)
-      output
-    end
 
-    def render_obj_to_output(obj, output)
-      case obj
-      when NilClass
-        # Do nothing
-      when Array
-        obj.each do |o|
-          render_obj_to_output(o, output)
-        end
+      if obj.is_a?(Array)
+        output << obj.join
+      elsif obj.nil?
       else
-        output << Liquid::Utils.to_s(obj)
+        output << obj.to_s
       end
+
+      output
     end
 
     def disabled?(_context)
@@ -142,7 +116,7 @@ module Liquid
 
     private
 
-    def lax_parse_filter_expressions(filter_name, unparsed_args)
+    def parse_filter_expressions(filter_name, unparsed_args)
       filter_args  = []
       keyword_args = nil
       unparsed_args.each do |a|
@@ -158,46 +132,6 @@ module Liquid
       result
     end
 
-    # Surprisingly, positional and keyword arguments can be mixed.
-    #
-    # filter = filtername [":" filterargs?]
-    # filterargs = argument ("," argument)*
-    # argument = (positional_argument | keyword_argument)
-    # positional_argument = expression
-    # keyword_argument = id ":" expression
-    def strict2_parse_filter_expressions(p)
-      filtername = p.consume(:id)
-      filter_args = []
-      keyword_args = {}
-
-      if p.consume?(:colon)
-        # Parse first argument (no leading comma)
-        argument(p, filter_args, keyword_args) unless end_of_arguments?(p)
-
-        # Parse remaining arguments (with leading commas) and optional trailing comma
-        argument(p, filter_args, keyword_args) while p.consume?(:comma) && !end_of_arguments?(p)
-      end
-
-      result = [filtername, filter_args]
-      result << keyword_args unless keyword_args.empty?
-      result
-    end
-
-    def argument(p, positional_arguments, keyword_arguments)
-      if p.look(:id) && p.look(:colon, 1)
-        key = p.consume(:id)
-        p.consume(:colon)
-        value = parse_context.safe_parse_expression(p)
-        keyword_arguments[key] = value
-      else
-        positional_arguments << parse_context.safe_parse_expression(p)
-      end
-    end
-
-    def end_of_arguments?(p)
-      p.look(:pipe) || p.look(:end_of_string)
-    end
-
     def evaluate_filter_expressions(context, filter_args, filter_kwargs)
       parsed_args = filter_args.map { |expr| context.evaluate(expr) }
       if filter_kwargs
@@ -212,7 +146,7 @@ module Liquid
 
     class ParseTreeVisitor < Liquid::ParseTreeVisitor
       def children
-        [@node.name] + @node.filters.flatten.flat_map { |value| value.is_a?(Hash) ? value.values : value }
+        [@node.name] + @node.filters.flatten
       end
     end
   end

lib/liquid/variable_lookup.rb

@@ -6,20 +6,16 @@ module Liquid
 
     attr_reader :name, :lookups
 
-    def self.parse(markup, string_scanner = StringScanner.new(""), cache = nil)
-      new(markup, string_scanner, cache)
+    def self.parse(markup)
+      new(markup)
     end
 
-    def initialize(markup, string_scanner = StringScanner.new(""), cache = nil)
+    def initialize(markup)
       lookups = markup.scan(VariableParser)
 
       name = lookups.shift
       if name&.start_with?('[') && name&.end_with?(']')
-        name = Expression.parse(
-          name[1..-2],
-          string_scanner,
-          cache,
-        )
+        name = Expression.parse(name[1..-2])
       end
       @name = name
 
@@ -29,23 +25,13 @@ module Liquid
       @lookups.each_index do |i|
         lookup = lookups[i]
         if lookup&.start_with?('[') && lookup&.end_with?(']')
-          lookups[i] = Expression.parse(
-            lookup[1..-2],
-            string_scanner,
-            cache,
-          )
+          lookups[i] = Expression.parse(lookup[1..-2])
         elsif COMMAND_METHODS.include?(lookup)
           @command_flags |= 1 << i
         end
       end
     end
 
-    # @api private
-    def add_lookup(key, command: false)
-      @command_flags |= 1 << @lookups.length if command && COMMAND_METHODS.include?(key)
-      @lookups << key
-    end
-
     def lookup_command?(lookup_index)
       @command_flags & (1 << lookup_index) != 0
     end
@@ -76,11 +62,6 @@ module Liquid
         elsif lookup_command?(i) && object.respond_to?(key)
           object = object.send(key).to_liquid
 
-        # Handle string first/last like ActiveSupport does (returns first/last character)
-        # ActiveSupport returns "" for empty strings, not nil
-        elsif lookup_command?(i) && object.is_a?(String) && (key == "first" || key == "last")
-          object = key == "first" ? (object[0] || "") : (object[-1] || "")
-
           # No key was present with the desired value and it wasn't one of the directly supported
           # keywords either. The only thing we got left is to return nil or
           # raise an exception if `strict_variables` option is set to true

lib/liquid/version.rb

@@ -2,5 +2,5 @@
 # frozen_string_literal: true
 
 module Liquid
-  VERSION = "5.13.0"
+  VERSION = "5.4.0"
 end

liquid.gemspec

@@ -13,11 +13,11 @@ Gem::Specification.new do |s|
   s.summary     = "A secure, non-evaling end user template engine with aesthetic markup."
   s.authors     = ["Tobias Lütke"]
   s.email       = ["[email protected]"]
-  s.homepage    = "https://shopify.github.io/liquid/"
+  s.homepage    = "http://www.liquidmarkup.org"
   s.license     = "MIT"
   # s.description = "A secure, non-evaling end user template engine with aesthetic markup."
 
-  s.required_ruby_version     = ">= 3.0.0"
+  s.required_ruby_version     = ">= 2.7.0"
   s.required_rubygems_version = ">= 1.3.7"
 
   s.metadata['allowed_push_host'] = 'https://rubygems.org'
@@ -28,9 +28,6 @@ Gem::Specification.new do |s|
 
   s.require_path = "lib"
 
-  s.add_dependency("strscan", ">= 3.1.1")
-  s.add_dependency("bigdecimal")
-
   s.add_development_dependency('rake', '~> 13.0')
   s.add_development_dependency('minitest')
 end

performance/benchmark.rb

@@ -3,23 +3,18 @@
 require 'benchmark/ips'
 require_relative 'theme_runner'
 
-RubyVM::YJIT.enable if defined?(RubyVM::YJIT)
-Liquid::Environment.default.error_mode = ARGV.first.to_sym if ARGV.first
-
+Liquid::Template.error_mode = ARGV.first.to_sym if ARGV.first
 profiler = ThemeRunner.new
 
 Benchmark.ips do |x|
-  x.time   = 20
-  x.warmup = 10
+  x.time   = 10
+  x.warmup = 5
 
   puts
   puts "Running benchmark for #{x.time} seconds (with #{x.warmup} seconds warmup)."
   puts
 
-  phase = ENV["PHASE"] || "all"
-
-  x.report("tokenize:") { profiler.tokenize } if phase == "all" || phase == "tokenize"
-  x.report("parse:") { profiler.compile } if phase == "all" || phase == "parse"
-  x.report("render:") { profiler.render } if phase == "all" || phase == "render"
-  x.report("parse & render:") { profiler.run } if phase == "all" || phase == "run"
+  x.report("parse:") { profiler.compile }
+  x.report("render:") { profiler.render }
+  x.report("parse & render:") { profiler.run }
 end

performance/shopify/database.rb

@@ -49,3 +49,8 @@ module Database
     end
   end
 end
+
+if __FILE__ == $PROGRAM_NAME
+  p(Database.tables['collections']['frontpage'].keys)
+  # p Database.tables['blog']['articles']
+end

performance/shopify/liquid.rb

@@ -11,12 +11,11 @@ require_relative 'shop_filter'
 require_relative 'tag_filter'
 require_relative 'weight_filter'
 
-default_environment = Liquid::Environment.default
-default_environment.register_tag('paginate', Paginate)
-default_environment.register_tag('form', CommentForm)
+Liquid::Template.register_tag('paginate', Paginate)
+Liquid::Template.register_tag('form', CommentForm)
 
-default_environment.register_filter(JsonFilter)
-default_environment.register_filter(MoneyFilter)
-default_environment.register_filter(WeightFilter)
-default_environment.register_filter(ShopFilter)
-default_environment.register_filter(TagFilter)
+Liquid::Template.register_filter(JsonFilter)
+Liquid::Template.register_filter(MoneyFilter)
+Liquid::Template.register_filter(WeightFilter)
+Liquid::Template.register_filter(ShopFilter)
+Liquid::Template.register_filter(TagFilter)

performance/shopify/paginate.rb

@@ -45,8 +45,8 @@ class Paginate < Liquid::Block
 
       pagination['items']      = collection_size
       pagination['pages']      = page_count - 1
-      pagination['previous']   = link('&laquo; Previous', current_page - 1)  if 1 < current_page
-      pagination['next']       = link('Next &raquo;', current_page + 1)      if page_count > current_page + 1
+      pagination['previous']   = link('&laquo; Previous', current_page - 1)  unless 1 >= current_page
+      pagination['next']       = link('Next &raquo;', current_page + 1)      unless page_count <= current_page + 1
       pagination['parts']      = []
 
       hellip_break = false

performance/theme_runner.rb

@@ -48,19 +48,6 @@ class ThemeRunner
     end
   end
 
-  # `tokenize` will just test the tokenizen portion of liquid without any templates
-  def tokenize
-    ss = StringScanner.new("")
-    @tests.each do |test_hash|
-      tokenizer = Liquid::Tokenizer.new(
-        source: test_hash[:liquid],
-        string_scanner: ss,
-        line_numbers: true,
-      )
-      while tokenizer.shift; end
-    end
-  end
-
   # `run` is called to benchmark rendering and compiling at the same time
   def run
     each_test do |liquid, layout, assigns, page_template, template_name|

performance/unit/expression_benchmark.rb

@@ -1,94 +0,0 @@
-# frozen_string_literal: true
-
-require "benchmark/ips"
-
-# benchmark liquid lexing
-
-require 'liquid'
-
-RubyVM::YJIT.enable
-
-STRING_MARKUPS = [
-  "\"foo\"",
-  "\"fooooooooooo\"",
-  "\"foooooooooooooooooooooooooooooo\"",
-  "'foo'",
-  "'fooooooooooo'",
-  "'foooooooooooooooooooooooooooooo'",
-]
-
-VARIABLE_MARKUPS = [
-  "article",
-  "article.title",
-  "article.title.size",
-  "very_long_variable_name_2024_11_05",
-  "very_long_variable_name_2024_11_05.size",
-]
-
-NUMBER_MARKUPS = [
-  "0",
-  "35",
-  "1241891024912849",
-  "3.5",
-  "3.51214128409128",
-  "12381902839.123819283910283",
-  "123.456.789",
-  "-123",
-  "-12.33",
-  "-405.231",
-  "-0",
-  "0",
-  "0.0",
-  "0.0000000000000000000000",
-  "0.00000000001",
-]
-
-RANGE_MARKUPS = [
-  "(1..30)",
-  "(1...30)",
-  "(1..30..5)",
-  "(1.0...30.0)",
-  "(1.........30)",
-  "(1..foo)",
-  "(foo..30)",
-  "(foo..bar)",
-  "(foo...bar...100)",
-  "(foo...bar...100.0)",
-]
-
-LITERAL_MARKUPS = [
-  nil,
-  'nil',
-  'null',
-  '',
-  'true',
-  'false',
-  'blank',
-  'empty',
-]
-
-MARKUPS = {
-  "string" => STRING_MARKUPS,
-  "literal" => LITERAL_MARKUPS,
-  "variable" => VARIABLE_MARKUPS,
-  "number" => NUMBER_MARKUPS,
-  "range" => RANGE_MARKUPS,
-}
-
-Benchmark.ips do |x|
-  x.config(time: 5, warmup: 5)
-
-  MARKUPS.each do |type, markups|
-    x.report("Liquid::Expression#parse: #{type}") do
-      markups.each do |markup|
-        Liquid::Expression.parse(markup)
-      end
-    end
-  end
-
-  x.report("Liquid::Expression#parse: all") do
-    MARKUPS.values.flatten.each do |markup|
-      Liquid::Expression.parse(markup)
-    end
-  end
-end

performance/unit/lexer_benchmark.rb

@@ -1,43 +0,0 @@
-# frozen_string_literal: true
-
-require "benchmark/ips"
-
-# benchmark liquid lexing
-
-require 'liquid'
-
-RubyVM::YJIT.enable
-
-EXPRESSIONS = [
-  "foo[1..2].baz",
-  "12.0",
-  "foo.bar.based",
-  "21 - 62",
-  "foo.bar.baz",
-  "foo > 12",
-  "foo < 12",
-  "foo <= 12",
-  "foo >= 12",
-  "foo <> 12",
-  "foo == 12",
-  "foo != 12",
-  "foo contains 12",
-  "foo contains 'bar'",
-  "foo != 'bar'",
-  "'foo' contains 'bar'",
-  '234089',
-  "foo | default: -1",
-]
-
-Benchmark.ips do |x|
-  x.config(time: 10, warmup: 5)
-
-  x.report("Liquid::Lexer#tokenize") do
-    EXPRESSIONS.each do |expr|
-      l = Liquid::Lexer.new(expr)
-      l.tokenize
-    end
-  end
-
-  x.compare!
-end

spec/ruby_liquid.rb

@@ -1,49 +0,0 @@
-# frozen_string_literal: true
-
-# Liquid Spec Adapter for Shopify/liquid (Ruby reference implementation)
-#
-# Run with: bundle exec liquid-spec run spec/ruby_liquid.rb
-
-$LOAD_PATH.unshift(File.expand_path('../lib', __dir__))
-require 'liquid'
-require_relative 'support/liquid_spec_adapter_helper'
-
-LiquidSpec.configure do |config|
-  config.missing_features = [
-    :activesupport,
-    :lax_parsing,
-    :shopify_filters,
-    :shopify_includes,
-    :shopify_blank,
-    :shopify_error_handling,
-    :shopify_error_format,
-    :shopify_string_access,
-  ]
-end
-
-# Compile a template string into a Liquid::Template
-LiquidSpec.compile do |ctx, source, options|
-  options[:error_mode] ||= :strict
-  ctx[:template] = Liquid::Template.parse(source, **options)
-end
-
-# Render a compiled template with the given context
-# @param ctx [Hash] adapter context containing :template
-# @param assigns [Hash] environment variables
-# @param options [Hash] :registers, :strict_errors, :exception_renderer
-LiquidSpec.render do |ctx, assigns, options|
-  registers = Liquid::Registers.new(options[:registers] || {})
-
-  context = Liquid::Context.build(
-    static_environments: assigns,
-    registers: registers,
-    rethrow_errors: options[:strict_errors],
-    resource_limits: LiquidSpecAdapterHelper.resource_limits(options),
-  )
-
-  context.exception_renderer = options[:exception_renderer] if options[:exception_renderer]
-
-  LiquidSpecAdapterHelper.with_frozen_time do
-    ctx[:template].render(context)
-  end
-end

spec/ruby_liquid_lax.rb

@@ -1,46 +0,0 @@
-# frozen_string_literal: true
-
-# Liquid Spec Adapter for Shopify/liquid with lax parsing mode
-#
-# Run with: bundle exec liquid-spec run spec/ruby_liquid_lax.rb
-
-$LOAD_PATH.unshift(File.expand_path('../lib', __dir__))
-require 'liquid'
-require_relative 'support/liquid_spec_adapter_helper'
-
-LiquidSpec.configure do |config|
-  config.missing_features = [
-    :activesupport,
-    :shopify_filters,
-    :shopify_includes,
-    :shopify_blank,
-    :shopify_error_handling,
-    :shopify_error_format,
-    :shopify_string_access,
-  ]
-end
-
-# Compile a template string into a Liquid::Template
-LiquidSpec.compile do |ctx, source, options|
-  # Default to lax mode while still honoring specs that explicitly set error_mode.
-  options = { error_mode: :lax }.merge(options)
-  ctx[:template] = Liquid::Template.parse(source, **options)
-end
-
-# Render a compiled template with the given context
-LiquidSpec.render do |ctx, assigns, options|
-  registers = Liquid::Registers.new(options[:registers] || {})
-
-  context = Liquid::Context.build(
-    static_environments: assigns,
-    registers: registers,
-    rethrow_errors: options[:strict_errors],
-    resource_limits: LiquidSpecAdapterHelper.resource_limits(options),
-  )
-
-  context.exception_renderer = options[:exception_renderer] if options[:exception_renderer]
-
-  LiquidSpecAdapterHelper.with_frozen_time do
-    ctx[:template].render(context)
-  end
-end

spec/ruby_liquid_with_active_support.rb

@@ -1,49 +0,0 @@
-# frozen_string_literal: true
-
-# Liquid Spec Adapter for Shopify/liquid with ActiveSupport loaded
-#
-# Run with: bundle exec liquid-spec run spec/ruby_liquid_with_active_support.rb
-
-$LOAD_PATH.unshift(File.expand_path('../lib', __dir__))
-require 'active_support/all'
-require 'liquid'
-require_relative 'support/liquid_spec_adapter_helper'
-
-LiquidSpec.configure do |config|
-  config.missing_features = [
-    :lax_parsing,
-    :shopify_filters,
-    :shopify_includes,
-    :shopify_blank,
-    :shopify_error_handling,
-    :shopify_error_format,
-    :shopify_string_access,
-  ]
-end
-
-# Compile a template string into a Liquid::Template
-LiquidSpec.compile do |ctx, source, options|
-  options[:error_mode] ||= :strict
-  ctx[:template] = Liquid::Template.parse(source, **options)
-end
-
-# Render a compiled template with the given context
-# @param ctx [Hash] adapter context containing :template
-# @param assigns [Hash] environment variables
-# @param options [Hash] :registers, :strict_errors, :exception_renderer
-LiquidSpec.render do |ctx, assigns, options|
-  registers = Liquid::Registers.new(options[:registers] || {})
-
-  context = Liquid::Context.build(
-    static_environments: assigns,
-    registers: registers,
-    rethrow_errors: options[:strict_errors],
-    resource_limits: LiquidSpecAdapterHelper.resource_limits(options),
-  )
-
-  context.exception_renderer = options[:exception_renderer] if options[:exception_renderer]
-
-  LiquidSpecAdapterHelper.with_frozen_time do
-    ctx[:template].render(context)
-  end
-end

spec/ruby_liquid_yjit.rb

@@ -1,53 +0,0 @@
-# frozen_string_literal: true
-
-# Liquid Spec Adapter for Shopify/liquid with YJIT + strict mode + ActiveSupport
-#
-# Run with: bundle exec liquid-spec run spec/ruby_liquid_yjit.rb
-
-$LOAD_PATH.unshift(File.expand_path('../lib', __dir__))
-
-# Enable YJIT if available
-if defined?(RubyVM::YJIT) && RubyVM::YJIT.respond_to?(:enable)
-  RubyVM::YJIT.enable
-end
-
-require 'active_support/all'
-require 'liquid'
-require_relative 'support/liquid_spec_adapter_helper'
-
-LiquidSpec.configure do |config|
-  config.missing_features = [
-    :lax_parsing,
-    :shopify_filters,
-    :shopify_includes,
-    :shopify_blank,
-    :shopify_error_handling,
-    :shopify_error_format,
-    :shopify_string_access,
-  ]
-end
-
-# Compile a template string into a Liquid::Template
-LiquidSpec.compile do |ctx, source, options|
-  # Force strict mode
-  options = { error_mode: :strict }.merge(options)
-  ctx[:template] = Liquid::Template.parse(source, **options)
-end
-
-# Render a compiled template with the given context
-LiquidSpec.render do |ctx, assigns, options|
-  registers = Liquid::Registers.new(options[:registers] || {})
-
-  context = Liquid::Context.build(
-    static_environments: assigns,
-    registers: registers,
-    rethrow_errors: options[:strict_errors],
-    resource_limits: LiquidSpecAdapterHelper.resource_limits(options),
-  )
-
-  context.exception_renderer = options[:exception_renderer] if options[:exception_renderer]
-
-  LiquidSpecAdapterHelper.with_frozen_time do
-    ctx[:template].render(context)
-  end
-end

spec/support/liquid_spec_adapter_helper.rb

@@ -1,24 +0,0 @@
-# frozen_string_literal: true
-
-module LiquidSpecAdapterHelper
-  extend self
-
-  def resource_limits(render_options)
-    return unless render_options[:resource_limits]
-
-    Liquid::ResourceLimits.new({}).tap do |limits|
-      render_options[:resource_limits].each do |key, value|
-        limits.public_send(:"#{key}=", value)
-      end
-    end
-  end
-
-  def with_frozen_time(&block)
-    original_tz = ENV['TZ']
-    ENV['TZ'] = 'UTC'
-
-    Liquid::Spec::TimeFreezer.freeze(Liquid::Spec::AdapterRunner::TEST_TIME, &block)
-  ensure
-    ENV['TZ'] = original_tz
-  end
-end

test/integration/assign_test.rb

@@ -14,25 +14,19 @@ class AssignTest < Minitest::Test
   end
 
   def test_assigned_variable
-    assert_template_result(
-      '.foo.',
+    assert_template_result('.foo.',
       '{% assign foo = values %}.{{ foo[0] }}.',
-      { 'values' => %w(foo bar baz) },
-    )
+      { 'values' => %w(foo bar baz) })
 
-    assert_template_result(
-      '.bar.',
+    assert_template_result('.bar.',
       '{% assign foo = values %}.{{ foo[1] }}.',
-      { 'values' => %w(foo bar baz) },
-    )
+      { 'values' => %w(foo bar baz) })
   end
 
   def test_assign_with_filter
-    assert_template_result(
-      '.bar.',
+    assert_template_result('.bar.',
       '{% assign foo = values | split: "," %}.{{ foo[1] }}.',
-      { 'values' => "foo,bar,baz" },
-    )
+      { 'values' => "foo,bar,baz" })
   end
 
   def test_assign_syntax_error
@@ -40,11 +34,8 @@ class AssignTest < Minitest::Test
   end
 
   def test_assign_uses_error_mode
-    assert_match_syntax_error(
-      "Expected dotdot but found pipe in ",
-      "{% assign foo = ('X' | downcase) %}",
-      error_mode: :strict,
-    )
+    assert_match_syntax_error("Expected dotdot but found pipe in ",
+      "{% assign foo = ('X' | downcase) %}", error_mode: :strict)
     assert_template_result("", "{% assign foo = ('X' | downcase) %}", error_mode: :lax)
   end
 
@@ -97,46 +88,6 @@ class AssignTest < Minitest::Test
     assert_equal(12, assign_score_of('int' => 123, 'str' => 'abcd'))
   end
 
-  def test_assign_with_valid_identifier_in_strict2
-    assert_template_result("hello", "{% assign my_var = 'hello' %}{{ my_var }}", error_mode: :strict2)
-  end
-
-  def test_assign_with_hyphen_in_strict2
-    assert_template_result("hello", "{% assign my-var = 'hello' %}{{ my-var }}", error_mode: :strict2)
-  end
-
-  def test_assign_rejects_parentheses_in_variable_name_in_strict2
-    assert_raises(Liquid::SyntaxError) do
-      Liquid::Template.parse("{% assign (a(b(c) = 1234 %}", error_mode: :strict2)
-    end
-  end
-
-  def test_assign_rejects_brackets_in_variable_name_in_strict2
-    assert_raises(Liquid::SyntaxError) do
-      Liquid::Template.parse("{% assign [x.y] = 'hello' %}", error_mode: :strict2)
-    end
-  end
-
-  def test_assign_rejects_dot_in_variable_name_in_strict2
-    assert_raises(Liquid::SyntaxError) do
-      Liquid::Template.parse("{% assign a.b = 'hello' %}", error_mode: :strict2)
-    end
-  end
-
-  def test_assign_rejects_numeric_variable_name_in_strict2
-    assert_raises(Liquid::SyntaxError) do
-      Liquid::Template.parse("{% assign 1abc = 'hello' %}", error_mode: :strict2)
-    end
-  end
-
-  def test_assign_allows_invalid_names_in_lax
-    assert_template_result("1234", "{% assign (a(b(c) = 1234 %}{{ self['(a(b(c)'] }}", error_mode: :lax)
-  end
-
-  def test_assign_with_filter_in_strict2
-    assert_template_result("HELLO", "{% assign my_var = 'hello' | upcase %}{{ my_var }}", error_mode: :strict2)
-  end
-
   private
 
   class ObjectWrapperDrop < Liquid::Drop

test/integration/blank_body_error_handling_test.rb

@@ -1,85 +0,0 @@
-# frozen_string_literal: true
-
-require 'test_helper'
-
-class BlankBodyErrorHandlingTest < Minitest::Test
-  COMPARISON_ERROR = 'Liquid error (line 1): comparison of Integer with String failed'
-  INVALID_INTEGER_ERROR = 'Liquid error (line 1): invalid integer'
-
-  def render_inline(source, error_mode:, assigns: {})
-    Liquid::Template.parse(source, line_numbers: true, error_mode: error_mode).render(assigns, render_errors: true)
-  end
-
-  def assert_render_raises(source, error_mode:, assigns: {}, message: nil)
-    error = assert_raises(Liquid::ArgumentError) do
-      Liquid::Template.parse(source, line_numbers: true, error_mode: error_mode).render!(assigns)
-    end
-    assert_includes(error.message, message) if message
-  end
-
-  def test_blank_if_body_suppresses_inline_error_text_in_lax_and_strict
-    [:lax, :strict].each do |mode|
-      assert_equal('', render_inline('{% if 5 > "x" %}{% endif %}', error_mode: mode))
-    end
-  end
-
-  def test_blank_unless_body_suppresses_inline_error_text_in_lax_and_strict
-    [:lax, :strict].each do |mode|
-      assert_equal('', render_inline('{% unless 5 > "x" %} {% endunless %}', error_mode: mode))
-    end
-  end
-
-  def test_blank_for_body_suppresses_inline_error_text_in_lax_and_strict
-    [:lax, :strict].each do |mode|
-      assert_equal('', render_inline('{% for i in (1..3) offset: xs %}{% endfor %}', error_mode: mode, assigns: { 'xs' => 'bad' }))
-    end
-  end
-
-  def test_strict2_blank_if_body_shows_inline_error_text
-    assert_equal(COMPARISON_ERROR, render_inline('{% if 5 > "x" %}{% endif %}', error_mode: :strict2))
-  end
-
-  def test_strict2_whitespace_if_body_shows_inline_error_text
-    assert_equal(COMPARISON_ERROR, render_inline('{% if 5 > "x" %}   {% endif %}', error_mode: :strict2))
-  end
-
-  def test_strict2_assign_if_body_shows_inline_error_text
-    assert_equal(COMPARISON_ERROR, render_inline('{% if 5 > "x" %}{% assign a = 1 %}{% endif %}', error_mode: :strict2))
-  end
-
-  def test_strict2_comment_if_body_shows_inline_error_text
-    assert_equal(COMPARISON_ERROR, render_inline('{% if 5 > "x" %}{% comment %}c{% endcomment %}{% endif %}', error_mode: :strict2))
-  end
-
-  def test_strict2_capture_if_body_shows_inline_error_text
-    assert_equal(COMPARISON_ERROR, render_inline('{% if 5 > "x" %}{% capture c %}text{% endcapture %}{% endif %}', error_mode: :strict2))
-  end
-
-  def test_strict2_blank_unless_body_shows_inline_error_text
-    assert_equal(COMPARISON_ERROR, render_inline('{% unless 5 > "x" %} {% endunless %}', error_mode: :strict2))
-  end
-
-  def test_strict2_blank_for_body_shows_inline_error_text
-    assert_equal(INVALID_INTEGER_ERROR, render_inline('{% for i in (1..3) offset: xs %}{% endfor %}', error_mode: :strict2, assigns: { 'xs' => 'bad' }))
-  end
-
-  def test_nonblank_bodies_show_inline_error_text_in_all_modes
-    [:lax, :strict, :strict2].each do |mode|
-      assert_equal(COMPARISON_ERROR, render_inline('{% if 5 > "x" %}{% echo 1 %}{% endif %}', error_mode: mode))
-      assert_equal(COMPARISON_ERROR, render_inline('{% if 5 > "x" %}{{ "" }}{% endif %}', error_mode: mode))
-      assert_equal(COMPARISON_ERROR, render_inline('{% if 5 > "x" %}{% else %}E{% endif %}', error_mode: mode))
-    end
-  end
-
-  def test_raised_errors_are_not_swallowed_by_blank_if_body
-    [:lax, :strict, :strict2].each do |mode|
-      assert_render_raises('{% if 5 > "x" %}{% endif %}', error_mode: mode, message: 'comparison of Integer with String failed')
-    end
-  end
-
-  def test_raised_errors_are_not_swallowed_by_blank_for_body
-    [:lax, :strict, :strict2].each do |mode|
-      assert_render_raises('{% for i in (1..3) offset: xs %}{% endfor %}', error_mode: mode, assigns: { 'xs' => 'bad' }, message: 'invalid integer')
-    end
-  end
-end

test/integration/blank_test.rb

@@ -57,11 +57,9 @@ class BlankTest < Minitest::Test
 
   def test_nested_blocks_are_blank_but_only_if_all_children_are
     assert_template_result("", wrap(wrap(" ")))
-    assert_template_result(
-      "\n       but this is not " * (N + 1),
+    assert_template_result("\n       but this is not " * (N + 1),
       wrap('{% if true %} {% comment %} this is blank {% endcomment %} {% endif %}
-      {% if true %} but this is not {% endif %}'),
-    )
+      {% if true %} but this is not {% endif %}'))
   end
 
   def test_assigns_are_blank
@@ -91,21 +89,12 @@ class BlankTest < Minitest::Test
   end
 
   def test_include_is_blank
-    assert_template_result(
-      "foobar" * (N + 1),
-      wrap("{% include 'foobar' %}"),
-      partials: { 'foobar' => 'foobar' },
-    )
-    assert_template_result(
-      " foobar " * (N + 1),
-      wrap("{% include ' foobar ' %}"),
-      partials: { ' foobar ' => ' foobar ' },
-    )
-    assert_template_result(
-      "   " * (N + 1),
-      wrap(" {% include ' ' %} "),
-      partials: { ' ' => ' ' },
-    )
+    assert_template_result("foobar" * (N + 1), wrap("{% include 'foobar' %}"),
+      partials: { 'foobar' => 'foobar' })
+    assert_template_result(" foobar " * (N + 1), wrap("{% include ' foobar ' %}"),
+      partials: { ' foobar ' => ' foobar ' })
+    assert_template_result("   " * (N + 1), wrap(" {% include ' ' %} "),
+      partials: { ' ' => ' ' })
   end
 
   def test_case_is_blank

test/integration/capture_test.rb

@@ -6,11 +6,7 @@ class CaptureTest < Minitest::Test
   include Liquid
 
   def test_captures_block_content_in_variable
-    assert_template_result("test string", "{% capture var %}test string{% endcapture %}{{var}}", {})
-  end
-
-  def test_captures_block_content_in_quoted_variable_in_lax
-    assert_template_result("test string", "{% capture 'var' %}test string{% endcapture %}{{var}}", {}, error_mode: :lax)
+    assert_template_result("test string", "{% capture 'var' %}test string{% endcapture %}{{var}}", {})
   end
 
   def test_capture_with_hyphen_in_variable_name
@@ -53,35 +49,4 @@ class CaptureTest < Minitest::Test
     t.render!
     assert_equal(9, t.resource_limits.assign_score)
   end
-
-  def test_capture_with_valid_identifier_in_strict2
-    assert_template_result("hello", "{% capture my_var %}hello{% endcapture %}{{ my_var }}", error_mode: :strict2)
-  end
-
-  def test_capture_with_hyphen_in_strict2
-    assert_template_result("hello", "{% capture my-var %}hello{% endcapture %}{{ my-var }}", error_mode: :strict2)
-  end
-
-  def test_capture_rejects_parentheses_in_variable_name_in_strict2
-    assert_raises(Liquid::SyntaxError) do
-      Liquid::Template.parse("{% capture (x[y %}hello{% endcapture %}", error_mode: :strict2)
-    end
-  end
-
-  def test_capture_rejects_dot_in_variable_name_in_strict2
-    assert_raises(Liquid::SyntaxError) do
-      Liquid::Template.parse("{% capture a.b %}hello{% endcapture %}", error_mode: :strict2)
-    end
-  end
-
-  def test_capture_rejects_numeric_variable_name_in_strict2
-    assert_raises(Liquid::SyntaxError) do
-      Liquid::Template.parse("{% capture 1abc %}hello{% endcapture %}", error_mode: :strict2)
-    end
-  end
-
-  def test_capture_allows_invalid_names_in_lax
-    t = Liquid::Template.parse("{% capture (x[y %}hello{% endcapture %}", error_mode: :lax)
-    assert_equal("(x[y", t.root.nodelist.first.to)
-  end
 end

test/integration/context_test.rb

@@ -36,24 +36,6 @@ class Category
   end
 end
 
-class ProductsDrop < Liquid::Drop
-  def initialize(products)
-    @products = products
-  end
-
-  def size
-    @products.size
-  end
-
-  def to_liquid
-    if @context["forloop"]
-      @products.first(@context["forloop"].length)
-    else
-      @products
-    end
-  end
-end
-
 class CategoryDrop < Liquid::Drop
   attr_accessor :category, :context
 
@@ -139,23 +121,14 @@ class ContextTest < Minitest::Test
   end
 
   def test_length_query
-    assert_template_result(
-      "true",
-      "{% if numbers.size == 4 %}true{% endif %}",
-      { "numbers" => [1, 2, 3, 4] },
-    )
+    assert_template_result("true", "{% if numbers.size == 4 %}true{% endif %}",
+      { "numbers" => [1, 2, 3, 4] })
 
-    assert_template_result(
-      "true",
-      "{% if numbers.size == 4 %}true{% endif %}",
-      { "numbers" => { 1 => 1, 2 => 2, 3 => 3, 4 => 4 } },
-    )
+    assert_template_result("true", "{% if numbers.size == 4 %}true{% endif %}",
+      { "numbers" => { 1 => 1, 2 => 2, 3 => 3, 4 => 4 } })
 
-    assert_template_result(
-      "true",
-      "{% if numbers.size == 1000 %}true{% endif %}",
-      { "numbers" => { 1 => 1, 2 => 2, 3 => 3, 4 => 4, 'size' => 1000 } },
-    )
+    assert_template_result("true", "{% if numbers.size == 1000 %}true{% endif %}",
+      { "numbers" => { 1 => 1, 2 => 2, 3 => 3, 4 => 4, 'size' => 1000 } })
   end
 
   def test_hyphenated_variable
@@ -255,14 +228,12 @@ class ContextTest < Minitest::Test
   end
 
   def test_hash_to_array_transition
-    assigns = {
-      'colors' => {
-        'Blue' => ['003366', '336699', '6699CC', '99CCFF'],
-        'Green' => ['003300', '336633', '669966', '99CC99'],
-        'Yellow' => ['CC9900', 'FFCC00', 'FFFF99', 'FFFFCC'],
-        'Red' => ['660000', '993333', 'CC6666', 'FF9999'],
-      },
-    }
+    assigns = { 'colors' => {
+      'Blue' => ['003366', '336699', '6699CC', '99CCFF'],
+      'Green' => ['003300', '336633', '669966', '99CC99'],
+      'Yellow' => ['CC9900', 'FFCC00', 'FFFF99', 'FFFFCC'],
+      'Red' => ['660000', '993333', 'CC6666', 'FF9999'],
+    } }
 
     assert_template_result("003366", "{{ colors.Blue[0] }}", assigns)
     assert_template_result("FF9999", "{{ colors.Red[3] }}", assigns)
@@ -291,13 +262,13 @@ class ContextTest < Minitest::Test
     assigns = { 'product' => { 'variants' => [{ 'title' => 'draft151cm' }, { 'title' => 'element151cm' }] } }
     assert_template_result("draft151cm", '{{ product["variants"][0]["title"] }}', assigns)
     assert_template_result("element151cm", '{{ product["variants"][1]["title"] }}', assigns)
-    assert_template_result("draft151cm", '{{ product["variants"].first["title"] }}', assigns)
+    assert_template_result("draft151cm", '{{ product["variants"][0]["title"] }}', assigns)
     assert_template_result("element151cm", '{{ product["variants"].last["title"] }}', assigns)
   end
 
   def test_access_variable_with_hash_notation
-    assert_template_result('baz', '{{ foo }}', { "foo" => "baz" })
-    assert_template_result('baz', '{{ self[bar] }}', { 'foo' => 'baz', 'bar' => 'foo' })
+    assert_template_result('baz', '{{ ["foo"] }}', { "foo" => "baz" })
+    assert_template_result('baz', '{{ [bar] }}', { 'foo' => 'baz', 'bar' => 'foo' })
   end
 
   def test_access_hashes_with_hash_access_variables
@@ -439,12 +410,10 @@ class ContextTest < Minitest::Test
   def test_nested_lambda_is_called_once
     @global = 0
 
-    @context['callcount'] = {
-      "lambda" => proc {
-                    @global += 1
-                    @global.to_s
-                  },
-    }
+    @context['callcount'] = { "lambda" => proc {
+                                            @global += 1
+                                            @global.to_s
+                                          } }
 
     assert_equal('1', @context['callcount.lambda'])
     assert_equal('1', @context['callcount.lambda'])
@@ -454,11 +423,10 @@ class ContextTest < Minitest::Test
   def test_lambda_in_array_is_called_once
     @global = 0
 
-    p = proc {
-      @global += 1
-      @global.to_s
-    }
-    @context['callcount'] = [1, 2, p, 4, 5]
+    @context['callcount'] = [1, 2, proc {
+                                     @global += 1
+                                     @global.to_s
+                                   }, 4, 5]
 
     assert_equal('1', @context['callcount[2]'])
     assert_equal('1', @context['callcount[2]'])
@@ -505,7 +473,7 @@ class ContextTest < Minitest::Test
   def test_static_environments_are_read_with_lower_priority_than_environments
     context = Context.build(
       static_environments: { 'shadowed' => 'static', 'unshadowed' => 'static' },
-      environments: { 'shadowed' => 'dynamic' },
+      environments: { 'shadowed' => 'dynamic' }
     )
 
     assert_equal('dynamic', context['shadowed'])
@@ -632,28 +600,13 @@ class ContextTest < Minitest::Test
   end
 
   def test_has_key_will_not_add_an_error_for_missing_keys
-    with_error_modes(:strict) do
+    with_error_mode(:strict) do
       context = Context.new
       context.key?('unknown')
       assert_empty(context.errors)
     end
   end
 
-  def test_key_lookup_will_raise_for_missing_keys_when_strict_variables_is_enabled
-    context = Context.new
-    context.strict_variables = true
-    assert_raises(Liquid::UndefinedVariable) do
-      context['unknown']
-    end
-  end
-
-  def test_has_key_will_not_raise_for_missing_keys_when_strict_variables_is_enabled
-    context = Context.new
-    context.strict_variables = true
-    refute(context.key?('unknown'))
-    assert_empty(context.errors)
-  end
-
   def test_context_always_uses_static_registers
     registers = {
       my_register: :my_value,
@@ -668,40 +621,6 @@ class ContextTest < Minitest::Test
     assert_equal(:my_value, c.registers[:my_register])
   end
 
-  def test_variable_to_liquid_returns_contextual_drop
-    context = {
-      "products" => ProductsDrop.new(["A", "B", "C", "D", "E"]),
-    }
-
-    template = Liquid::Template.parse(<<~LIQUID)
-      {%- for i in (1..3) -%}
-        for_loop_products_count: {{ products | size }}
-      {% endfor %}
-
-      unscoped_products_count: {{ products | size }}
-    LIQUID
-
-    result = template.render(context)
-
-    assert_includes(result, "for_loop_products_count: 3")
-    assert_includes(result, "unscoped_products_count: 5")
-  end
-
-  def test_new_isolated_context_inherits_parent_environment
-    global_environment = Liquid::Environment.build(tags: {})
-    context = Context.build(environment: global_environment)
-
-    subcontext = context.new_isolated_subcontext
-    assert_equal(global_environment, subcontext.environment)
-  end
-
-  def test_newly_built_context_inherits_parent_environment
-    global_environment = Liquid::Environment.build(tags: {})
-    context = Context.build(environment: global_environment)
-    assert_equal(global_environment, context.environment)
-    assert(context.environment.tags.each.to_a.empty?)
-  end
-
   private
 
   def assert_no_object_allocations

test/integration/error_handling_test.rb

@@ -67,7 +67,7 @@ class ErrorHandlingTest < Minitest::Test
   end
 
   def test_unrecognized_operator
-    with_error_modes(:strict) do
+    with_error_mode(:strict) do
       assert_raises(SyntaxError) do
         Liquid::Template.parse(' {% if 1 =! 2 %}ok{% endif %} ')
       end
@@ -105,8 +105,7 @@ class ErrorHandlingTest < Minitest::Test
   end
 
   def test_parsing_warn_with_line_numbers_adds_numbers_to_lexer_errors
-    template = Liquid::Template.parse(
-      '
+    template = Liquid::Template.parse('
         foobar
 
         {% if 1 =! 2 %}ok{% endif %}
@@ -114,19 +113,15 @@ class ErrorHandlingTest < Minitest::Test
         bla
             ',
       error_mode: :warn,
-      line_numbers: true,
-    )
+      line_numbers: true)
 
-    assert_equal(
-      ['Liquid syntax error (line 4): Unexpected character = in "1 =! 2"'],
-      template.warnings.map(&:message),
-    )
+    assert_equal(['Liquid syntax error (line 4): Unexpected character = in "1 =! 2"'],
+      template.warnings.map(&:message))
   end
 
   def test_parsing_strict_with_line_numbers_adds_numbers_to_lexer_errors
     err = assert_raises(SyntaxError) do
-      Liquid::Template.parse(
-        '
+      Liquid::Template.parse('
           foobar
 
           {% if 1 =! 2 %}ok{% endif %}
@@ -134,8 +129,7 @@ class ErrorHandlingTest < Minitest::Test
           bla
                 ',
         error_mode: :strict,
-        line_numbers: true,
-      )
+        line_numbers: true)
     end
 
     assert_equal('Liquid syntax error (line 4): Unexpected character = in "1 =! 2"', err.message)
@@ -203,34 +197,20 @@ class ErrorHandlingTest < Minitest::Test
   end
 
   def test_setting_default_exception_renderer
+    old_exception_renderer = Liquid::Template.default_exception_renderer
     exceptions = []
-    default_exception_renderer = ->(e) {
+    Liquid::Template.default_exception_renderer = ->(e) {
       exceptions << e
       ''
     }
-
-    env = Liquid::Environment.build(exception_renderer: default_exception_renderer)
-    template = Liquid::Template.parse('This is a runtime error: {{ errors.argument_error }}', environment: env)
+    template = Liquid::Template.parse('This is a runtime error: {{ errors.argument_error }}')
 
     output = template.render('errors' => ErrorDrop.new)
 
     assert_equal('This is a runtime error: ', output)
     assert_equal([Liquid::ArgumentError], template.errors.map(&:class))
-  end
-
-  def test_setting_exception_renderer_on_environment
-    exceptions = []
-    exception_renderer = ->(e) do
-      exceptions << e
-      ''
-    end
-
-    environment = Liquid::Environment.build(exception_renderer: exception_renderer)
-    template = Liquid::Template.parse('This is a runtime error: {{ errors.argument_error }}', environment: environment)
-    output = template.render('errors' => ErrorDrop.new)
-
-    assert_equal('This is a runtime error: ', output)
-    assert_equal([Liquid::ArgumentError], template.errors.map(&:class))
+  ensure
+    Liquid::Template.default_exception_renderer = old_exception_renderer if old_exception_renderer
   end
 
   def test_exception_renderer_exposing_non_liquid_error
@@ -256,10 +236,16 @@ class ErrorHandlingTest < Minitest::Test
   end
 
   def test_included_template_name_with_line_numbers
-    environment = Liquid::Environment.build(file_system: TestFileSystem.new)
-    template = Liquid::Template.parse("Argument error:\n{% include 'product' %}", line_numbers: true, environment: environment)
-    page     = template.render('errors' => ErrorDrop.new)
+    old_file_system = Liquid::Template.file_system
 
+    begin
+      Liquid::Template.file_system = TestFileSystem.new
+
+      template = Liquid::Template.parse("Argument error:\n{% include 'product' %}", line_numbers: true)
+      page     = template.render('errors' => ErrorDrop.new)
+    ensure
+      Liquid::Template.file_system = old_file_system
+    end
     assert_equal("Argument error:\nLiquid error (product line 1): argument error", page)
     assert_equal("product", template.errors.first.template_name)
   end
@@ -268,87 +254,7 @@ class ErrorHandlingTest < Minitest::Test
     output = Liquid::Template.parse("{% assign x = 0 %}{% if 1 < '2' %}not blank{% assign x = 3 %}{% endif %}{{ x }}").render
     assert_equal("Liquid error: comparison of Integer with String failed0", output)
 
-    source = "{% assign x = 0 %}{% if 1 < '2' %}{% assign x = 3 %}{% endif %}{{ x }}"
-    [:lax, :warn, :strict].each do |mode|
-      assert_equal("0", Liquid::Template.parse(source, error_mode: mode).render)
-    end
-    assert_equal("Liquid error: comparison of Integer with String failed0", Liquid::Template.parse(source, error_mode: :strict2).render)
-  end
-
-  def test_syntax_error_is_raised_with_template_name
-    file_system = StubFileSystem.new("snippet" => "1\n2\n{{ 1")
-
-    context = Liquid::Context.build(
-      registers: { file_system: file_system },
-    )
-
-    template = Template.parse(
-      '{% render "snippet" %}',
-      line_numbers: true,
-    )
-    template.name = "template/index"
-
-    assert_equal(
-      "Liquid syntax error (snippet line 3): Variable '{{' was not properly terminated with regexp: /\\}\\}/",
-      template.render(context),
-    )
-  end
-
-  def test_syntax_error_is_raised_with_template_name_from_template_factory
-    file_system = StubFileSystem.new("snippet" => "1\n2\n{{ 1")
-
-    context = Liquid::Context.build(
-      registers: {
-        file_system: file_system,
-        template_factory: StubTemplateFactory.new,
-      },
-    )
-
-    template = Template.parse(
-      '{% render "snippet" %}',
-      line_numbers: true,
-    )
-    template.name = "template/index"
-
-    assert_equal(
-      "Liquid syntax error (some/path/snippet line 3): Variable '{{' was not properly terminated with regexp: /\\}\\}/",
-      template.render(context),
-    )
-  end
-
-  def test_error_is_raised_during_parse_with_template_name
-    depth = Liquid::Block::MAX_DEPTH + 1
-    code = "{% if true %}" * depth + "rendered" + "{% endif %}" * depth
-
-    template = Template.parse("{% render 'snippet' %}", line_numbers: true)
-
-    context = Liquid::Context.build(
-      registers: {
-        file_system: StubFileSystem.new("snippet" => code),
-        template_factory: StubTemplateFactory.new,
-      },
-    )
-
-    assert_equal("Liquid error (some/path/snippet line 1): Nesting too deep", template.render(context))
-  end
-
-  def test_internal_error_is_raised_with_template_name
-    template = Template.new
-    template.parse(
-      "{% render 'snippet' %}",
-      line_numbers: true,
-    )
-    template.name = "template/index"
-
-    context = Liquid::Context.build(
-      registers: {
-        file_system: StubFileSystem.new({}),
-      },
-    )
-
-    assert_equal(
-      "Liquid error (template/index line 1): internal",
-      template.render(context),
-    )
+    output = Liquid::Template.parse("{% assign x = 0 %}{% if 1 < '2' %}{% assign x = 3 %}{% endif %}{{ x }}").render
+    assert_equal("0", output)
   end
 end

test/integration/expression_test.rb

@@ -1,7 +1,6 @@
 # frozen_string_literal: true
 
 require 'test_helper'
-require 'lru_redux'
 
 class ExpressionTest < Minitest::Test
   def test_keyword_literals
@@ -14,7 +13,6 @@ class ExpressionTest < Minitest::Test
     assert_template_result("double quoted", '{{"double quoted"}}')
     assert_template_result("spaced", "{{ 'spaced' }}")
     assert_template_result("spaced2", "{{ 'spaced2' }}")
-    assert_template_result("emoji🔥", "{{ 'emoji🔥' }}")
   end
 
   def test_int
@@ -24,22 +22,8 @@ class ExpressionTest < Minitest::Test
   end
 
   def test_float
-    assert_template_result("-17.42", "{{ -17.42 }}")
     assert_template_result("2.5", "{{ 2.5 }}")
-
-    with_error_modes(:lax) do
-      assert_expression_result(0.0, "0.....5")
-      assert_expression_result(0.0, "-0..1")
-    end
-
     assert_expression_result(1.5, "1.5")
-
-    # this is a unfortunate quirky behavior of Liquid
-    result = Expression.parse(".5")
-    assert_kind_of(Liquid::VariableLookup, result)
-
-    result = Expression.parse("-.5")
-    assert_kind_of(Liquid::VariableLookup, result)
   end
 
   def test_range
@@ -48,139 +32,14 @@ class ExpressionTest < Minitest::Test
 
     assert_match_syntax_error(
       "Liquid syntax error (line 1): Invalid expression type 'false' in range expression",
-      "{{ (false..true) }}",
+      "{{ (false..true) }}"
     )
     assert_match_syntax_error(
       "Liquid syntax error (line 1): Invalid expression type '(1..2)' in range expression",
-      "{{ ((1..2)..3) }}",
+      "{{ ((1..2)..3) }}"
     )
   end
 
-  def test_quirky_negative_sign_expression_markup
-    result = Expression.parse("-", nil)
-    assert(result.is_a?(VariableLookup))
-    assert_equal("-", result.name)
-
-    # for this template, the expression markup is "-"
-    assert_template_result(
-      "",
-      "{{ - 'theme.css' - }}",
-      error_mode: :lax,
-    )
-  end
-
-  def test_expression_cache
-    skip("Liquid-C does not support Expression caching") if defined?(Liquid::C) && Liquid::C.enabled
-
-    cache = {}
-    template = <<~LIQUID
-      {% assign x = 1 %}
-      {{ x }}
-      {% assign x = 2 %}
-      {{ x }}
-      {% assign y = 1 %}
-      {{ y }}
-    LIQUID
-
-    Liquid::Template.parse(template, expression_cache: cache).render
-
-    assert_equal(
-      ["1", "2", "x", "y"],
-      cache.to_a.map { _1[0] }.sort,
-    )
-  end
-
-  def test_expression_cache_with_true_boolean
-    skip("Liquid-C does not support Expression caching") if defined?(Liquid::C) && Liquid::C.enabled
-
-    template = <<~LIQUID
-      {% assign x = 1 %}
-      {{ x }}
-      {% assign x = 2 %}
-      {{ x }}
-      {% assign y = 1 %}
-      {{ y }}
-    LIQUID
-
-    parse_context = ParseContext.new(expression_cache: true)
-
-    Liquid::Template.parse(template, parse_context).render
-
-    cache = parse_context.instance_variable_get(:@expression_cache)
-
-    assert_equal(
-      ["1", "2", "x", "y"],
-      cache.to_a.map { _1[0] }.sort,
-    )
-  end
-
-  def test_expression_cache_with_lru_redux
-    skip("Liquid-C does not support Expression caching") if defined?(Liquid::C) && Liquid::C.enabled
-
-    cache = LruRedux::Cache.new(10)
-    template = <<~LIQUID
-      {% assign x = 1 %}
-      {{ x }}
-      {% assign x = 2 %}
-      {{ x }}
-      {% assign y = 1 %}
-      {{ y }}
-    LIQUID
-
-    Liquid::Template.parse(template, expression_cache: cache).render
-
-    assert_equal(
-      ["1", "2", "x", "y"],
-      cache.to_a.map { _1[0] }.sort,
-    )
-  end
-
-  def test_disable_expression_cache
-    skip("Liquid-C does not support Expression caching") if defined?(Liquid::C) && Liquid::C.enabled
-
-    template = <<~LIQUID
-      {% assign x = 1 %}
-      {{ x }}
-      {% assign x = 2 %}
-      {{ x }}
-      {% assign y = 1 %}
-      {{ y }}
-    LIQUID
-
-    parse_context = Liquid::ParseContext.new(expression_cache: false)
-    Liquid::Template.parse(template, parse_context).render
-    assert(parse_context.instance_variable_get(:@expression_cache).nil?)
-  end
-
-  def test_safe_parse_with_variable_lookup
-    parse_context = Liquid::ParseContext.new
-    parser = parse_context.new_parser('product.title')
-    result = Liquid::Expression.safe_parse(parser)
-
-    assert_instance_of(Liquid::VariableLookup, result)
-    assert_equal('product', result.name)
-    assert_equal(['title'], result.lookups)
-  end
-
-  def test_safe_parse_with_number
-    parse_context = Liquid::ParseContext.new
-    parser = parse_context.new_parser('42')
-    result = Liquid::Expression.safe_parse(parser)
-
-    assert_equal(42, result)
-  end
-
-  def test_safe_parse_raises_syntax_error_for_invalid_expression
-    parse_context = Liquid::ParseContext.new
-    parser = parse_context.new_parser('')
-
-    error = assert_raises(Liquid::SyntaxError) do
-      Liquid::Expression.safe_parse(parser)
-    end
-
-    assert_match(/is not a valid expression/, error.message)
-  end
-
   private
 
   def assert_expression_result(expect, markup, **assigns)

test/integration/filter_kwarg_test.rb

@@ -17,7 +17,7 @@ class FilterKwargTest < Minitest::Test
     with_global_filter(KwargFilter) do
       assert_equal(
         "data-src='src' data-widths='100, 200'",
-        Template.parse("{{ 'img' | html_tag: data-src: 'src', data-widths: '100, 200' }}").render(nil, nil),
+        Template.parse("{{ 'img' | html_tag: data-src: 'src', data-widths: '100, 200' }}").render(nil, nil)
       )
     end
   end

test/integration/filter_test.rb

@@ -68,34 +68,22 @@ class FiltersTest < Minitest::Test
 
   def test_sort
     assert_template_result("1 2 3 4", "{{numbers | sort | join}}", { "numbers" => [2, 1, 4, 3] })
-    assert_template_result(
-      "alphabetic as expected",
-      "{{words | sort | join}}",
-      { "words" => ['expected', 'as', 'alphabetic'] },
-    )
+    assert_template_result("alphabetic as expected", "{{words | sort | join}}",
+      { "words" => ['expected', 'as', 'alphabetic'] })
     assert_template_result("3", "{{value | sort}}", { "value" => 3 })
     assert_template_result('are flower', "{{arrays | sort | join}}", { 'arrays' => ['flower', 'are'] })
-    assert_template_result(
-      "Expected case sensitive",
-      "{{case_sensitive | sort | join}}",
-      { "case_sensitive" => ["sensitive", "Expected", "case"] },
-    )
+    assert_template_result("Expected case sensitive", "{{case_sensitive | sort | join}}",
+      { "case_sensitive" => ["sensitive", "Expected", "case"] })
   end
 
   def test_sort_natural
     # Test strings
-    assert_template_result(
-      "Assert case Insensitive",
-      "{{words | sort_natural | join}}",
-      { "words" => ["case", "Assert", "Insensitive"] },
-    )
+    assert_template_result("Assert case Insensitive", "{{words | sort_natural | join}}",
+      { "words" => ["case", "Assert", "Insensitive"] })
 
     # Test hashes
-    assert_template_result(
-      "A b C",
-      "{{hashes | sort_natural: 'a' | map: 'a' | join}}",
-      { "hashes" => [{ "a" => "A" }, { "a" => "b" }, { "a" => "C" }] },
-    )
+    assert_template_result("A b C", "{{hashes | sort_natural: 'a' | map: 'a' | join}}",
+      { "hashes" => [{ "a" => "A" }, { "a" => "b" }, { "a" => "C" }] })
 
     # Test objects
     @context['objects'] = [TestObject.new('A'), TestObject.new('b'), TestObject.new('C')]
@@ -104,18 +92,12 @@ class FiltersTest < Minitest::Test
 
   def test_compact
     # Test strings
-    assert_template_result(
-      "a b c",
-      "{{words | compact | join}}",
-      { "words" => ['a', nil, 'b', nil, 'c'] },
-    )
+    assert_template_result("a b c", "{{words | compact | join}}",
+      { "words" => ['a', nil, 'b', nil, 'c'] })
 
     # Test hashes
-    assert_template_result(
-      "A C",
-      "{{hashes | compact: 'a' | map: 'a' | join}}",
-      { "hashes" => [{ "a" => "A" }, { "a" => nil }, { "a" => "C" }] },
-    )
+    assert_template_result("A C", "{{hashes | compact: 'a' | map: 'a' | join}}",
+      { "hashes" => [{ "a" => "A" }, { "a" => nil }, { "a" => "C" }] })
 
     # Test objects
     @context['objects'] = [TestObject.new('A'), TestObject.new(nil), TestObject.new('C')]
@@ -127,11 +109,8 @@ class FiltersTest < Minitest::Test
   end
 
   def test_strip_html_ignore_comments_with_html
-    assert_template_result(
-      "bla blub",
-      "{{ var | strip_html }}",
-      { "var" => "<!-- split and some <ul> tag --><b>bla blub</a>" },
-    )
+    assert_template_result("bla blub", "{{ var | strip_html }}",
+      { "var" => "<!-- split and some <ul> tag --><b>bla blub</a>" })
   end
 
   def test_capitalize

test/integration/hash_rendering_test.rb

@@ -1,100 +0,0 @@
-# frozen_string_literal: true
-
-require 'test_helper'
-
-class HashRenderingTest < Minitest::Test
-  def test_render_empty_hash
-    assert_template_result("{}", "{{ my_hash }}", { "my_hash" => {} })
-  end
-
-  def test_render_hash_with_string_keys_and_values
-    assert_template_result("{\"key1\"=>\"value1\", \"key2\"=>\"value2\"}", "{{ my_hash }}", { "my_hash" => { "key1" => "value1", "key2" => "value2" } })
-  end
-
-  def test_render_hash_with_symbol_keys_and_integer_values
-    assert_template_result("{:key1=>1, :key2=>2}", "{{ my_hash }}", { "my_hash" => { key1: 1, key2: 2 } })
-  end
-
-  def test_render_nested_hash
-    assert_template_result("{\"outer\"=>{\"inner\"=>\"value\"}}", "{{ my_hash }}", { "my_hash" => { "outer" => { "inner" => "value" } } })
-  end
-
-  def test_render_hash_with_array_values
-    assert_template_result("{\"numbers\"=>[1, 2, 3]}", "{{ my_hash }}", { "my_hash" => { "numbers" => [1, 2, 3] } })
-  end
-
-  def test_render_recursive_hash
-    recursive_hash = { "self" => {} }
-    recursive_hash["self"]["self"] = recursive_hash
-    assert_template_result("{\"self\"=>{\"self\"=>{...}}}", "{{ my_hash }}", { "my_hash" => recursive_hash })
-  end
-
-  def test_hash_with_downcase_filter
-    assert_template_result("{\"key\"=>\"value\", \"anotherkey\"=>\"anothervalue\"}", "{{ my_hash | downcase }}", { "my_hash" => { "Key" => "Value", "AnotherKey" => "AnotherValue" } })
-  end
-
-  def test_hash_with_upcase_filter
-    assert_template_result("{\"KEY\"=>\"VALUE\", \"ANOTHERKEY\"=>\"ANOTHERVALUE\"}", "{{ my_hash | upcase }}", { "my_hash" => { "Key" => "Value", "AnotherKey" => "AnotherValue" } })
-  end
-
-  def test_hash_with_strip_filter
-    assert_template_result("{\"Key\"=>\"Value\", \"AnotherKey\"=>\"AnotherValue\"}", "{{ my_hash | strip }}", { "my_hash" => { "Key" => "Value", "AnotherKey" => "AnotherValue" } })
-  end
-
-  def test_hash_with_escape_filter
-    assert_template_result("{&quot;Key&quot;=&gt;&quot;Value&quot;, &quot;AnotherKey&quot;=&gt;&quot;AnotherValue&quot;}", "{{ my_hash | escape }}", { "my_hash" => { "Key" => "Value", "AnotherKey" => "AnotherValue" } })
-  end
-
-  def test_hash_with_url_encode_filter
-    assert_template_result("%7B%22Key%22%3D%3E%22Value%22%2C+%22AnotherKey%22%3D%3E%22AnotherValue%22%7D", "{{ my_hash | url_encode }}", { "my_hash" => { "Key" => "Value", "AnotherKey" => "AnotherValue" } })
-  end
-
-  def test_hash_with_strip_html_filter
-    assert_template_result("{\"Key\"=>\"Value\", \"AnotherKey\"=>\"AnotherValue\"}", "{{ my_hash | strip_html }}", { "my_hash" => { "Key" => "Value", "AnotherKey" => "AnotherValue" } })
-  end
-
-  def test_hash_with_truncate__20_filter
-    assert_template_result("{\"Key\"=>\"Value\", ...", "{{ my_hash | truncate: 20 }}", { "my_hash" => { "Key" => "Value", "AnotherKey" => "AnotherValue" } })
-  end
-
-  def test_hash_with_replace___key____replaced_key__filter
-    assert_template_result("{\"Key\"=>\"Value\", \"AnotherKey\"=>\"AnotherValue\"}", "{{ my_hash | replace: 'key', 'replaced_key' }}", { "my_hash" => { "Key" => "Value", "AnotherKey" => "AnotherValue" } })
-  end
-
-  def test_hash_with_append____appended_text__filter
-    assert_template_result("{\"Key\"=>\"Value\", \"AnotherKey\"=>\"AnotherValue\"} appended text", "{{ my_hash | append: ' appended text' }}", { "my_hash" => { "Key" => "Value", "AnotherKey" => "AnotherValue" } })
-  end
-
-  def test_hash_with_prepend___prepended_text___filter
-    assert_template_result("prepended text {\"Key\"=>\"Value\", \"AnotherKey\"=>\"AnotherValue\"}", "{{ my_hash | prepend: 'prepended text ' }}", { "my_hash" => { "Key" => "Value", "AnotherKey" => "AnotherValue" } })
-  end
-
-  def test_render_hash_with_array_values_empty
-    assert_template_result("{\"numbers\"=>[]}", "{{ my_hash }}", { "my_hash" => { "numbers" => [] } })
-  end
-
-  def test_render_hash_with_array_values_hash
-    assert_template_result("{\"numbers\"=>[{:foo=>42}]}", "{{ my_hash }}", { "my_hash" => { "numbers" => [{ foo: 42 }] } })
-  end
-
-  def test_join_filter_with_hash
-    array = [{ "key1" => "value1" }, { "key2" => "value2" }]
-    glue = { "lol" => "wut" }
-    assert_template_result("{\"key1\"=>\"value1\"}{\"lol\"=>\"wut\"}{\"key2\"=>\"value2\"}", "{{ my_array | join: glue }}", { "my_array" => array, "glue" => glue })
-  end
-
-  def test_render_hash_with_hash_key
-    assert_template_result("{{\"foo\"=>\"bar\"}=>42}", "{{ my_hash }}", { "my_hash" => { Hash["foo" => "bar"] => 42 } })
-  end
-
-  def test_rendering_hash_with_custom_to_s_method_uses_custom_to_s
-    assert_template_result("kewl", "{{ my_hash }}", { "my_hash" => HashWithCustomToS.new })
-  end
-
-  def test_rendering_hash_without_custom_to_s_uses_default_inspect
-    my_hash = HashWithoutCustomToS.new
-    my_hash[:foo] = :bar
-
-    assert_template_result("{:foo=>:bar}", "{{ my_hash }}", { "my_hash" => my_hash })
-  end
-end

test/integration/let_closure_test.rb

@@ -1,547 +0,0 @@
-# frozen_string_literal: true
-
-require 'test_helper'
-
-class LetClosureTest < Minitest::Test
-  def test_value_binding_and_filtered_initializer
-    assert_render('HELLO:3', "{% let title = product.title | upcase %}{{ title }}:{% let n = 1 | plus: 2 %}{{ n }}", 'product' => { 'title' => 'hello' })
-  end
-
-  def test_initializer_reads_parent_before_installing_shadow
-    assert_render('231', '{% let n = 1 %}{% let title(step) %}{% let n = n | plus: step %}{{ n }}{% endlet %}{{ title(1) }}{{ title(2) }}{{ n }}')
-  end
-
-  def test_empty_and_parameterless_bodies
-    assert_render('ok', '{% let empty %}{% endlet %}{% let title() %}ok{% endlet %}{{ empty() }}{{ title() }}')
-  end
-
-  def test_parameters_are_writable_and_fresh
-    assert_render('23', '{% let title(n,) %}{% set n = n | plus: 1 %}{{ n }}{% endlet %}{{ title(1,) }}{{ title(2) }}')
-  end
-
-  def test_live_captures
-    assert_render('12', '{% let n = 1 %}{% let title %}{{ n }}{% endlet %}{{ title() }}{% set n = 2 %}{{ title() }}')
-  end
-
-  def test_captured_environments_fall_through_nil_values
-    context = Liquid::Context.build(environments: [{ 'n' => nil }, { 'n' => 'fallback' }])
-    source = '{{ n }}/{% let show %}{{ n }}{% endlet %}{{ show() }}'
-    assert_equal('fallback/fallback', parse(source).render!(context))
-  end
-
-  def test_captured_environments_keep_false_values
-    context = Liquid::Context.build(environments: [{ 'n' => false }, { 'n' => 'fallback' }])
-    source = '{{ n }}/{% let show %}{{ n }}{% endlet %}{{ show() }}'
-    assert_equal('false/false', parse(source).render!(context))
-  end
-
-  def test_captured_environments_use_hash_defaults
-    context = Liquid::Context.build(environments: Hash.new('fallback'))
-    source = '{{ n }}/{% let show %}{{ n }}{% endlet %}{{ show() }}'
-    assert_equal('fallback/fallback', parse(source).render!(context))
-  end
-
-  def test_captured_environments_fall_through_drops
-    context = Liquid::Context.build(environments: [Liquid::Drop.new, { 'n' => 'fallback' }])
-    source = '{{ n }}/{% let outer %}{% let inner %}{{ n }}{% endlet %}{{ inner() }}{% endlet %}{{ outer() }}'
-    assert_equal('fallback/fallback', parse(source).render!(context))
-  end
-
-  def test_captured_static_environments_preserve_fallthrough_and_defaults
-    context = Liquid::Context.build(environments: [], static_environments: [{ 'n' => nil }, Hash.new('fallback')])
-    source = '{{ n }}/{% let show %}{{ n }}{% endlet %}{{ show() }}'
-    assert_equal('fallback/fallback', parse(source).render!(context))
-  end
-
-  def test_captured_local_nil_shadows_environment_values
-    context = Liquid::Context.build(environments: { 'n' => 'dynamic' }, static_environments: { 'n' => 'static' })
-    source = '{% let n = nil %}{{ n }}/{% let outer %}{% let inner %}{{ n }}{% endlet %}{{ inner() }}{% endlet %}{{ outer() }}'
-    assert_equal('/', parse(source).render!(context))
-  end
-
-  def test_captured_local_self_nil_does_not_become_a_self_drop
-    source = '{% let self = nil %}{% let show %}{% if self == nil %}nil{% endif %}{% endlet %}{{ show() }}'
-    assert_render('nil', source)
-  end
-
-  def test_captured_environments_remain_live_and_read_only
-    values = { 'n' => 1 }
-    source = '{% let show %}{{ n }}{% set n = n | plus: 10 %}{{ n }}{% endlet %}{{ show() }}{% increment n %}{{ show() }}'
-    assert_render('1111212', source, values)
-    assert_equal(2, values['n'])
-  end
-
-  def test_strict_captured_environments_stop_at_nil
-    context = Liquid::Context.build(environments: [{ 'n' => nil }, { 'n' => 'fallback' }])
-    source = '{{ n }}/{% let show %}{{ n }}{% endlet %}{{ show() }}'
-    assert_equal('/', parse(source).render!(context, strict_variables: true))
-  end
-
-  def test_strict_captured_environments_reject_missing_keys_before_fallback
-    source = '{% let outer %}{% let inner %}{{ n }}{% endlet %}{{ inner() }}{% endlet %}{{ outer() }}'
-    context = Liquid::Context.build(environments: [{}, { 'n' => 'fallback' }])
-    assert_raises(Liquid::UndefinedVariable) { parse(source).render!(context, strict_variables: true) }
-  end
-
-  def test_strict_captured_environments_reject_hash_defaults
-    context = Liquid::Context.build(environments: Hash.new('fallback'))
-    source = '{% let show %}{{ n }}{% endlet %}{{ show() }}'
-    assert_raises(Liquid::UndefinedVariable) { parse(source).render!(context, strict_variables: true) }
-  end
-
-  def test_strict_captured_self_lookup_can_fall_back_to_self_drop
-    source = '{% let show %}{{ self["n"] }}{% endlet %}{{ show() }}'
-    assert_equal('value', parse(source).render!({ 'n' => 'value' }, strict_variables: true))
-  end
-
-  def test_render_in_closures_inherits_only_static_globals
-    file_system = StubFileSystem.new('snippet' => '{{ g }}/{{ dynamic }}/{{ local }};')
-    environment = Liquid::Environment.build(file_system: file_system)
-    context = Liquid::Context.build(environment: environment, environments: { 'dynamic' => 'D' }, static_environments: { 'g' => 'G' })
-    source = '{% let local = "L" %}{% render "snippet" %}{% let show %}{% render "snippet" %}{% render "snippet", dynamic: dynamic, local: local %}{% endlet %}{{ show() }}'
-    assert_equal('G//;G//;G/D/L;', parse(source, environment: environment).render!(context))
-  end
-
-  def test_render_in_closures_uses_globals_despite_local_shadows
-    file_system = StubFileSystem.new('snippet' => '{{ g }}')
-    environment = Liquid::Environment.build(file_system: file_system)
-    context = Liquid::Context.build(environment: environment, static_environments: { 'g' => 'G' })
-    source = '{% render "snippet" %}/{% let g = nil %}{% let outer %}{% let inner %}{{ g }}{% render "snippet" %}{% endlet %}{{ inner() }}{% endlet %}{{ outer() }}'
-    assert_equal('G/G', parse(source, environment: environment).render!(context))
-  end
-
-  def test_capture_shadows_are_fresh_and_read_only
-    assert_render('221', '{% let n = 1 %}{% let title %}{% set n = n | plus: 1 %}{{ n }}{% endlet %}{{ title() }}{{ title() }}{{ n }}')
-  end
-
-  def test_set_creates_missing_binding_at_invocation_root
-    source = '{% let title %}{% for i in (1..2) %}{% set n = n | plus: i %}{% endfor %}{{ n }}{% endlet %}{{ title() }}{{ title() }}'
-    assert_equal('33', parse(source).render!({}, strict_variables: true))
-  end
-
-  def test_set_searches_owned_control_flow_scopes
-    source = '{% let title(n) %}{% for i in (1..2) %}{% set n = n | plus: i %}{% set i = i | plus: 10 %}{{ i }},{% endfor %}{{ n }}{% endlet %}{{ title(1) }}'
-    assert_render('11,12,4', source)
-  end
-
-  def test_set_shadows_capture_at_root_from_inside_loop
-    source = '{% let n = 1 %}{% let title %}{% for i in (1..2) %}{% set n = n | plus: i %}{% endfor %}{{ n }}{% endlet %}{{ title() }}{{ n }}'
-    assert_render('41', source)
-  end
-
-  def test_let_shadows_in_loop_and_can_execute_repeatedly
-    source = '{% let n = 10 %}{% for i in (1..3) %}{% let n = i %}{% set n = n | plus: 1 %}{{ n }}{% endfor %}{{ n }}'
-    assert_render('23410', source)
-  end
-
-  def test_each_iteration_initializer_reads_outer_binding
-    source = '{% let n = 10 %}{% for i in (1..2) %}{% let n = n | plus: 1 %}{{ n }},{% endfor %}{{ n }}'
-    assert_render('11,11,10', source)
-  end
-
-  def test_retained_callbacks_capture_iteration_local_bindings
-    source = '{% let n = 10 %}{% let first = nil %}{% let second = nil %}{% for i in (1..2) %}{% let n = n | plus: i %}{% let title %}{{ n }}{% endlet %}{% if i == 1 %}{% set first = title %}{% else %}{% set second = title %}{% endif %}{% endfor %}{{ first() }}/{{ second() }}:{{ n }}'
-    assert_render('11/12:10', source)
-  end
-
-  def test_set_traverses_fresh_iteration_frames_and_persists_at_root
-    source = '{% let captured = 5 %}{% let title(n) %}{% for i in (1..2) %}{% let step = i %}{% set n = n | plus: step %}{% set missing = missing | plus: step %}{% set captured = captured | plus: step %}{% endfor %}{{ n }}/{{ missing }}/{{ captured }};{% endlet %}{{ title(1) }}{{ title(1) }}{{ captured }}'
-    assert_equal('4/3/8;4/3/8;5', parse(source).render!({}, strict_variables: true))
-  end
-
-  def test_each_table_row_initializer_reads_outer_binding
-    source = '{% let n = 10 %}{% tablerow i in (1..2) %}{% let n = n | plus: 1 %}{{ n }}{% endtablerow %}{{ n }}'
-    assert_render("<tr class=\"row1\">\n<td class=\"col1\">11</td><td class=\"col2\">11</td></tr>\n10", source)
-  end
-
-  def test_table_row_callbacks_retain_iteration_local_bindings
-    source = '{% let first = nil %}{% let second = nil %}{% tablerow i in (1..2) %}{% let n = i %}{% let title %}{{ n }}{% endlet %}{% if i == 1 %}{% set first = title %}{% else %}{% set second = title %}{% endif %}{% endtablerow %}{{ first() }}/{{ second() }}'
-    assert_render("<tr class=\"row1\">\n<td class=\"col1\"></td><td class=\"col2\"></td></tr>\n1/2", source)
-  end
-
-  def test_set_traverses_table_row_frames_to_invocation_root
-    source = '{% let title(n) %}{% tablerow i in (1..2) %}{% let step = i %}{% set n = n | plus: step %}{% set missing = missing | plus: step %}{% endtablerow %}{{ n }}/{{ missing }}{% endlet %}{{ title(1) }}'
-    assert_render("<tr class=\"row1\">\n<td class=\"col1\"></td><td class=\"col2\"></td></tr>\n4/3", source)
-  end
-
-  def test_empty_loop_branch_has_its_own_let_scope
-    source = '{% let n = 1 %}{% for i in missing %}{% else %}{% let n = 2 %}{{ n }}{% endfor %}{{ n }}'
-    assert_render('21', source)
-  end
-
-  def test_table_row_scope_can_shadow_outer_let
-    source = '{% let n = 10 %}{% tablerow i in (1..2) %}{% let n = i %}{{ n }}{% endtablerow %}{{ n }}'
-    assert_render("<tr class=\"row1\">\n<td class=\"col1\">1</td><td class=\"col2\">2</td></tr>\n10", source)
-  end
-
-  def test_body_declaration_can_execute_on_every_iteration
-    assert_render('123', '{% for i in (1..3) %}{% let title %}{{ i }}{% endlet %}{{ title() }}{% endfor %}')
-  end
-
-  def test_set_updates_nearest_owned_let
-    source = '{% let title(n) %}{% for i in (1..2) %}{% let n = i %}{% set n = n | plus: 10 %}{{ n }},{% endfor %}{{ n }}{% endlet %}{{ title(5) }}'
-    assert_render('11,12,5', source)
-  end
-
-  def test_nested_closures_have_live_read_only_captures
-    source = '{% let outer(n) %}{% let inner %}{% set n = n | plus: 10 %}{{ n }}{% endlet %}{% set n = n | plus: 1 %}{{ inner() }}{{ n }}{% endlet %}{{ outer(1) }}{{ outer(2) }}'
-    assert_render('122133', source)
-  end
-
-  def test_captures_search_all_parents_with_strict_variables
-    source = '{% let outer %}{% let inner %}{{ title }}{% endlet %}{{ inner() }}{% endlet %}{{ outer() }}'
-    assert_equal('hello', parse(source).render!({ 'title' => 'hello' }, strict_variables: true))
-  end
-
-  def test_repeated_renders_start_with_fresh_bindings
-    template = parse('{% set n = n | plus: 1 %}{% let title %}{% set n = n | plus: 1 %}{{ n }}{% endlet %}{{ title() }}{{ n }}')
-    2.times { assert_equal('21', template.render!) }
-  end
-
-  def test_repeated_renders_use_current_inputs
-    template = parse('{% let title = title | upcase %}{% let render_title %}{{ title }}{% endlet %}{{ render_title() }}')
-    assert_equal('FIRST', template.render!('title' => 'first'))
-    assert_equal('SECOND', template.render!('title' => 'second'))
-  end
-
-  def test_nil_and_false_bindings_are_owned
-    source = '{% let title %}{% let n = nil %}{% set n = n | default: 3 %}{% let flag = false %}{% set flag = true %}{{ n }}{{ flag }}{% endlet %}{{ title() }}'
-    assert_render('3true', source)
-  end
-
-  def test_nested_call_arguments_and_filters
-    source = '{% let title(text) %}[{{ text }}]{% endlet %}{{ title(title("hello")) | upcase }}'
-    assert_render('[[HELLO]]', source)
-  end
-
-  def test_calls_in_filter_arguments_conditions_and_dynamic_lookups
-    source = '{% let key %}title{% endlet %}{% if key() == "title" %}{{ product[key()] | append: key() }}{% endif %}'
-    assert_render('hellotitle', source, 'product' => { 'title' => 'hello' })
-  end
-
-  def test_calls_in_ranges
-    assert_render('123', '{% let finish %}3{% endlet %}{% for i in (1..finish()) %}{{ i }}{% endfor %}')
-  end
-
-  def test_callable_ranges_share_loop_continuation
-    source = '{% let finish %}3{% endlet %}{% for i in (1..finish()) limit: 1 %}{{ i }}{% endfor %}{% for i in ( 1 .. finish( ) ) limit: 1 offset: continue %}{{ i }}{% endfor %}'
-    assert_render('12', source)
-  end
-
-  def test_callable_dynamic_lookups_share_loop_continuation
-    source = '{% let key %}items{% endlet %}{% for i in groups[key()] limit: 1 %}{{ i }}{% endfor %}{% for i in groups[ key( ) ] limit: 1 offset: continue %}{{ i }}{% endfor %}'
-    assert_render('12', source, 'groups' => { 'items' => [1, 2, 3] })
-  end
-
-  def test_callable_collection_loop_names_preserve_syntax
-    source = '{% let identity(value) %}{{ value }}{% endlet %}{% let key %}items{% endlet %}{% for i in identity("a b") %}{{ forloop.name }}{% endfor %}/{% for i in groups[key()] limit: 1 %}{{ forloop.name }}{% endfor %}/{% for i in (1..identity(3)) limit: 1 %}{{ forloop.name }}{% endfor %}'
-    assert_render('i-identity("a b")/i-groups[key()]/i-(1..identity(3))', source, 'groups' => { 'items' => [1, 2, 3] })
-  end
-
-  def test_distinct_callable_arguments_have_separate_loop_continuations
-    source = '{% let finish(value) %}{{ value }}{% endlet %}{% for i in (1..finish(2)) limit: 1 %}{{ i }}{% endfor %}{% for i in (1..finish(3)) limit: 1 offset: continue %}{{ i }}{% endfor %}'
-    assert_render('11', source)
-  end
-
-  def test_callable_value_can_be_passed_through_let
-    assert_render('hello', '{% let title %}hello{% endlet %}{% let alias = title %}{{ alias() }}')
-  end
-
-  def test_multiline_liquid
-    source = <<~LIQUID
-      {% liquid
-        let n = 1
-        let title(step)
-          set n = n | plus: step
-          echo n
-        endlet
-        echo title(2)
-        echo n
-      %}
-    LIQUID
-    assert_render("31\n", source)
-  end
-
-  def test_same_scope_redeclarations_are_parse_errors
-    [
-      '{% let n = 1 %}{% let n = 2 %}',
-      '{% let n %}{% endlet %}{% let n = 2 %}',
-      '{% let title(n) %}{% let n = 1 %}{% endlet %}',
-      '{% let title %}{% let n = 1 %}{% if false %}{% let n = 2 %}{% endif %}{% endlet %}',
-    ].each do |source|
-      assert_raises(Liquid::SyntaxError, source) { parse(source) }
-    end
-  end
-
-  def test_invalid_headers_and_complete_input_validation
-    [
-      '{% let %}',
-      '{% let 1 = 2 %}',
-      '{% let a.b = 2 %}',
-      '{% let a == 2 %}',
-      '{% let a = %}',
-      '{% let a = 1 junk %}',
-      '{% let a = 1 | %}',
-      '{% let a(x) = 2 %}',
-      '{% let a(x,x) %}{% endlet %}',
-      '{% let a(,x) %}{% endlet %}',
-      '{% let a(x,,) %}{% endlet %}',
-      '{% let a(x) junk %}{% endlet %}',
-      '{% let a %}',
-      '{% set %}',
-      '{% set a.b = 1 %}',
-      '{% set a == 1 %}',
-      '{% set a = %}',
-      '{% set a = 1 junk %}',
-      '{{ title(,1) }}',
-      '{{ title(1,,) }}',
-      '{{ title(1) junk }}',
-      '{{ title(1 }}',
-    ].each do |source|
-      assert_raises(Liquid::SyntaxError, source) { parse(source) }
-    end
-  end
-
-  def test_assign_is_rejected_through_nested_control_flow
-    [
-      '{% assign x = 1 %}',
-      '{% if false %}{% assign x = 1 %}{% endif %}',
-      '{% for i in (1..2) %}{% unless false %}{% assign x = 1 %}{% endunless %}{% endfor %}',
-      '{% case n %}{% when 1 %}{% assign x = 1 %}{% endcase %}',
-      "{% liquid\nif false\nassign x = 1\nendif\n%}",
-    ].each do |body|
-      error = assert_raises(Liquid::SyntaxError) { parse("{% let title %}#{body}{% endlet %}") }
-      assert_match('assign is not allowed', error.message)
-    end
-  end
-
-  def test_assign_still_works_outside_closures
-    assert_render('12', '{% assign n = 1 %}{% let title %}{{ n }}{% endlet %}{{ title() }}{% assign n = 2 %}{{ title() }}')
-  end
-
-  def test_capture_tag_does_not_mutate_parent_bindings
-    assert_render('localparent', '{% let n = "parent" %}{% let title %}{% capture n %}local{% endcapture %}{{ n }}{% endlet %}{{ title() }}{{ n }}')
-  end
-
-  def test_counters_in_closures_have_fresh_shadows
-    source = '{% let n = 5 %}{% let title %}{% increment n %}{{ n }}{% decrement n %}{{ n }}{% endlet %}{{ title() }}{{ title() }}{{ n }}'
-    assert_render('565556555', source)
-  end
-
-  def test_tags_are_unavailable_in_every_other_mode
-    [:lax, :warn, :strict, :rigid].each do |mode|
-      ['{% let n = 1 %}', '{% let title %}{% endlet %}', '{% set n = 1 %}'].each do |source|
-        assert_raises(Liquid::SyntaxError, "#{mode}: #{source}") { Liquid::Template.parse(source, error_mode: mode) }
-      end
-    end
-  end
-
-  def test_calls_preserve_legacy_parsing_behavior
-    [:lax, :warn].each do |mode|
-      template = Liquid::Template.parse('{{ title(1) }}', error_mode: mode)
-      assert_equal('', template.render!('title' => 'value'))
-    end
-    [:strict, :rigid].each do |mode|
-      assert_raises(Liquid::SyntaxError) { Liquid::Template.parse('{{ title(1) }}', error_mode: mode) }
-    end
-  end
-
-  def test_effective_template_mode_overrides_environment
-    environment = Liquid::Environment.build(error_mode: :strict)
-    assert_equal('1', parse('{% let n = 1 %}{{ n }}', environment: environment).render!)
-    environment = Liquid::Environment.build(error_mode: :strict2)
-    assert_raises(Liquid::SyntaxError) { Liquid::Template.parse('{% let n = 1 %}', environment: environment, error_mode: :strict) }
-  end
-
-  def test_effective_partial_mode_enables_feature
-    environment = Liquid::Environment.build(error_mode: :strict2, file_system: StubFileSystem.new('snippet' => '{% let title %}ok{% endlet %}{{ title() }}'))
-    template = Liquid::Template.parse('{% render "snippet" %}', environment: environment, error_mode: :strict, include_options_blacklist: [:error_mode])
-    assert_equal('ok', template.render!)
-  end
-
-  def test_effective_partial_mode_disables_feature
-    [:lax, :warn, :strict, :rigid].each do |mode|
-      environment = Liquid::Environment.build(error_mode: mode, file_system: StubFileSystem.new('snippet' => '{% let n = 1 %}'))
-      template = parse('{% render "snippet" %}', environment: environment, include_options_blacklist: [:error_mode])
-      assert_raises(Liquid::SyntaxError) { template.render! }
-    end
-  end
-
-  def test_callable_security
-    callable = Object.new
-    def callable.to_liquid
-      self
-    end
-
-    def callable.call(*)
-      raise 'must not call arbitrary Ruby objects'
-    end
-    [callable, Liquid::Drop.new, 'text', 1, nil].each do |value|
-      assert_raises(Liquid::ArgumentError) { parse('{{ title(1) }}').render!('title' => value) }
-    end
-  end
-
-  def test_proc_lookup_is_unchanged_and_receives_no_callable_arguments
-    values = { 'title' => -> { 'resolved' } }
-    template = parse('{{ title(1) }}')
-    assert_raises(Liquid::ArgumentError) { template.render!(values) }
-    assert_equal('resolved', values['title'])
-    assert_equal('resolved', parse('{{ title }}').render!(values))
-  end
-
-  def test_proc_captures_keep_existing_lookup_and_memoization
-    values = { 'title' => -> { 'resolved' } }
-    assert_render('resolvedresolved', '{% let show %}{{ title }}{% endlet %}{{ show() }}{{ show() }}', values)
-    assert_equal('resolved', values['title'])
-  end
-
-  def test_nil_proc_captures_are_memoized_before_environment_fallback
-    values = { 'n' => -> { nil } }
-    context = Liquid::Context.build(environments: [values, { 'n' => 'fallback' }])
-    source = '{% let show %}{{ n }}{% endlet %}{{ show() }}/{{ show() }}'
-    assert_equal('fallback/fallback', parse(source).render!(context))
-    assert_nil(values['n'])
-  end
-
-  def test_nested_proc_captures_receive_the_current_invocation_context
-    values = { 'n' => ->(context) { context['argument'] } }
-    source = '{% let outer %}{% let inner(argument) %}{{ n }}{% endlet %}{{ inner("value") }}{% endlet %}{{ outer() }}'
-    assert_render('value', source, values)
-    assert_equal('value', values['n'])
-  end
-
-  def test_argument_count_is_validated
-    ['title()', 'title(1,2)'].each do |call|
-      assert_raises(Liquid::ArgumentError) { parse("{% let title(n) %}{{ n }}{% endlet %}{{ #{call} }}").render! }
-    end
-  end
-
-  def test_recursion_uses_liquid_runtime_depth_limit
-    template = parse('{% let title %}{{ title() }}{% endlet %}{{ title() }}')
-    assert_raises(Liquid::StackLevelError) { template.render! }
-  end
-
-  def test_output_buffer_and_output_limit
-    template = parse('{% let title %}hello{% endlet %}{{ title() }}{{ title() }}')
-    output = +'prefix:'
-    assert_same(output, template.render!({}, output: output))
-    assert_equal('prefix:hellohello', output)
-    template.resource_limits.render_length_limit = 9
-    assert_raises(Liquid::MemoryError) { template.render! }
-  end
-
-  def test_assignment_limits_include_let_set_and_callable_initializers
-    ['{% let n = "hello" %}', '{% set n = "hello" %}', '{% let title %}hello{% endlet %}{% let n = title() %}'].each do |source|
-      template = parse(source)
-      template.resource_limits.assign_score_limit = 4
-      assert_raises(Liquid::MemoryError) { template.render! }
-    end
-  end
-
-  def test_render_score_limit_includes_callable_body
-    template = parse('{% let title %}hello{% endlet %}{{ title() }}{{ title() }}')
-    template.resource_limits.render_score_limit = 4
-    assert_raises(Liquid::MemoryError) { template.render! }
-  end
-
-  def test_visitor_sees_initializers_arguments_and_bodies_without_captures
-    template = parse('{% let n = source | plus: step %}{% let title(x) %}{% set n = other %}{{ x }}{% endlet %}{{ title(product.name) }}')
-    visitor = Liquid::ParseTreeVisitor.for(template.root).add_callback_for(Liquid::VariableLookup) { |node| node.name } # rubocop:disable Style/SymbolProc
-    expected = ['source', 'step', 'other', 'x', 'title', 'product']
-    assert_equal(expected, visitor.visit.flatten.compact)
-    template.render!('source' => 1, 'step' => 2, 'other' => 3, 'product' => { 'name' => 'hello' })
-    assert_equal(expected, visitor.visit.flatten.compact)
-  end
-
-  def test_visitor_includes_initializer_filter_keyword_arguments
-    template = parse('{% let n = source | default: fallback, allow_false: flag %}')
-    visitor = Liquid::ParseTreeVisitor.for(template.root).add_callback_for(Liquid::VariableLookup) { |node| node.name } # rubocop:disable Style/SymbolProc
-    assert_equal(['source', 'fallback', 'flag'], visitor.visit.flatten.compact)
-  end
-
-  def test_custom_closure_body_parameters_are_writable_and_fresh
-    with_custom_tag('parameterized', ParameterizedBody) do
-      source = '{% let value = 10 %}{% parameterized %}{% set value = value | plus: 1 %}{{ value }}{% endparameterized %}{{ value }}'
-      assert_render('2310', source)
-    end
-  end
-
-  def test_custom_closure_body_exports_only_direct_child_body_declarations
-    source = '{% let n = 1 %}{% compose %}{% set n = n | plus: 1 %}{% let value = "hidden" %}{% if true %}{% let nested %}hidden{% endlet %}{% endif %}{% let item(text) %}{{ n }}:{{ text }}{% endlet %}{% endcompose %}{{ n }}'
-    with_custom_tag('compose', Compose) do
-      template = parse(source)
-      assert_equal('2:a|2:a|1', template.render!)
-      assert_equal('2:a|2:a|1', template.render!)
-    end
-  end
-
-  def test_custom_closure_bodies_can_nest
-    source = '{% compose %}{% let item(text) %}{% compose %}{% let item(inner) %}{{ text }}{{ inner }}{% endlet %}{% endcompose %}{% endlet %}{% endcompose %}'
-    with_custom_tag('compose', Compose) { assert_render('aa|aa||aa|aa||', source) }
-  end
-
-  def test_multiline_liquid_declarations_are_direct_child_exports
-    source = "{% compose %}{% liquid\nlet item(text)\necho text\nendlet\n%}{% endcompose %}"
-    with_custom_tag('compose', Compose) { assert_render('a|a|', source) }
-  end
-
-  def test_custom_closure_body_api_requires_strict2
-    with_custom_tag('compose', Compose) do
-      [:lax, :warn, :strict, :rigid].each do |mode|
-        assert_raises(Liquid::SyntaxError) { Liquid::Template.parse('{% compose %}{% endcompose %}', error_mode: mode) }
-      end
-    end
-  end
-
-  def test_custom_closure_body_rejects_nested_assign
-    with_custom_tag('compose', Compose) do
-      assert_raises(Liquid::SyntaxError) { parse('{% compose %}{% if false %}{% assign n = 1 %}{% endif %}{% endcompose %}') }
-    end
-  end
-
-  private
-
-  def parse(source, **options)
-    Liquid::Template.parse(source, **options, error_mode: :strict2)
-  end
-
-  def assert_render(expected, source, values = {})
-    assert_equal(expected, parse(source).render!(values))
-  end
-
-  class ParameterizedBody < Liquid::Block
-    def parse(tokens)
-      @closure_body = parse_closure_body(tokens, parameters: ['value'])
-    end
-
-    def render_to_output_buffer(context, output)
-      body = @closure_body.bind(context)
-      body.render_to_output_buffer(context, output, [1])
-      body.render_to_output_buffer(context, output, [2])
-    end
-  end
-
-  class Compose < Liquid::Block
-    def initialize(tag_name, markup, parse_context)
-      super
-      @component = Liquid::Template.parse("{{ item('a') }}|", environment: parse_context.environment, error_mode: :strict2)
-    end
-
-    def parse(tokens)
-      @closure_body = parse_closure_body(tokens)
-    end
-
-    def render_to_output_buffer(context, output)
-      body = @closure_body.bind(context)
-      2.times do
-        exports = body.invoke(context, output: output)
-        raise Liquid::ArgumentError, 'Unexpected exports' unless exports.keys == ['item']
-
-        inner = context.new_isolated_subcontext
-        inner.merge(exports)
-        @component.root.render_to_output_buffer(inner, output)
-      end
-      output
-    end
-  end
-end

test/integration/parsing_quirks_test.rb

@@ -31,18 +31,18 @@ class ParsingQuirksTest < Minitest::Test
   def test_error_on_empty_filter
     assert(Template.parse("{{test}}"))
 
-    with_error_modes(:lax) do
+    with_error_mode(:lax) do
       assert(Template.parse("{{|test}}"))
     end
 
-    with_error_modes(:strict) do
+    with_error_mode(:strict) do
       assert_raises(SyntaxError) { Template.parse("{{|test}}") }
       assert_raises(SyntaxError) { Template.parse("{{test |a|b|}}") }
     end
   end
 
   def test_meaningless_parens_error
-    with_error_modes(:strict) do
+    with_error_mode(:strict) do
       assert_raises(SyntaxError) do
         markup = "a == 'foo' or (b == 'bar' and c == 'baz') or false"
         Template.parse("{% if #{markup} %} YES {% endif %}")
@@ -51,7 +51,7 @@ class ParsingQuirksTest < Minitest::Test
   end
 
   def test_unexpected_characters_syntax_error
-    with_error_modes(:strict) do
+    with_error_mode(:strict) do
       assert_raises(SyntaxError) do
         markup = "true && false"
         Template.parse("{% if #{markup} %} YES {% endif %}")
@@ -70,7 +70,7 @@ class ParsingQuirksTest < Minitest::Test
   end
 
   def test_meaningless_parens_lax
-    with_error_modes(:lax) do
+    with_error_mode(:lax) do
       assigns = { 'b' => 'bar', 'c' => 'baz' }
       markup  = "a == 'foo' or (b == 'bar' and c == 'baz') or false"
       assert_template_result(' YES ', "{% if #{markup} %} YES {% endif %}", assigns)
@@ -78,7 +78,7 @@ class ParsingQuirksTest < Minitest::Test
   end
 
   def test_unexpected_characters_silently_eat_logic_lax
-    with_error_modes(:lax) do
+    with_error_mode(:lax) do
       markup = "true && false"
       assert_template_result(' YES ', "{% if #{markup} %} YES {% endif %}")
       markup = "false || true"
@@ -93,7 +93,7 @@ class ParsingQuirksTest < Minitest::Test
   end
 
   def test_unanchored_filter_arguments
-    with_error_modes(:lax) do
+    with_error_mode(:lax) do
       assert_template_result('hi', "{{ 'hi there' | split$$$:' ' | first }}")
 
       assert_template_result('x', "{{ 'X' | downcase) }}")
@@ -106,14 +106,14 @@ class ParsingQuirksTest < Minitest::Test
   end
 
   def test_invalid_variables_work
-    with_error_modes(:lax) do
+    with_error_mode(:lax) do
       assert_template_result('bar', "{% assign 123foo = 'bar' %}{{ 123foo }}")
       assert_template_result('123', "{% assign 123 = 'bar' %}{{ 123 }}")
     end
   end
 
   def test_extra_dots_in_ranges
-    with_error_modes(:lax) do
+    with_error_mode(:lax) do
       assert_template_result('12345', "{% for i in (1...5) %}{{ i }}{% endfor %}")
     end
   end
@@ -131,24 +131,4 @@ class ParsingQuirksTest < Minitest::Test
   def test_contains_in_id
     assert_template_result(' YES ', '{% if containsallshipments == true %} YES {% endif %}', { 'containsallshipments' => true })
   end
-
-  def test_incomplete_expression
-    with_error_modes(:lax) do
-      assert_template_result("false", "{{ false - }}")
-      assert_template_result("false", "{{ false > }}")
-      assert_template_result("false", "{{ false < }}")
-      assert_template_result("false", "{{ false = }}")
-      assert_template_result("false", "{{ false ! }}")
-      assert_template_result("false", "{{ false 1 }}")
-      assert_template_result("false", "{{ false a }}")
-
-      assert_template_result("false", "{% liquid assign foo = false -\n%}{{ foo }}")
-      assert_template_result("false", "{% liquid assign foo = false >\n%}{{ foo }}")
-      assert_template_result("false", "{% liquid assign foo = false <\n%}{{ foo }}")
-      assert_template_result("false", "{% liquid assign foo = false =\n%}{{ foo }}")
-      assert_template_result("false", "{% liquid assign foo = false !\n%}{{ foo }}")
-      assert_template_result("false", "{% liquid assign foo = false 1\n%}{{ foo }}")
-      assert_template_result("false", "{% liquid assign foo = false a\n%}{{ foo }}")
-    end
-  end
 end # ParsingQuirksTest

test/integration/profiler_test.rb

@@ -33,7 +33,7 @@ class ProfilerTest < Minitest::Test
   end
 
   def setup
-    Liquid::Environment.default.file_system = ProfilingFileSystem.new
+    Liquid::Template.file_system = ProfilingFileSystem.new
   end
 
   def test_template_allows_flagging_profiling

test/integration/security_test.rb

@@ -44,40 +44,33 @@ class SecurityTest < Minitest::Test
   end
 
   def test_does_not_permanently_add_filters_to_symbol_table
-    assert_no_new_symbols do
-      # MRI imprecisely marks objects found on the C stack, which can result
-      # in uninitialized memory being marked. This can even result in the test failing
-      # deterministically for a given compilation of ruby. Using a separate thread will
-      # keep these writes of the symbol pointer on a separate stack that will be garbage
-      # collected after Thread#join.
-      Thread.new do
-        test = %( {{ "some_string" | a_bad_filter }} )
-        Template.parse(test).render!
-        nil
-      end.join
+    current_symbols = Symbol.all_symbols
 
-      GC.start
-    end
+    # MRI imprecisely marks objects found on the C stack, which can result
+    # in uninitialized memory being marked. This can even result in the test failing
+    # deterministically for a given compilation of ruby. Using a separate thread will
+    # keep these writes of the symbol pointer on a separate stack that will be garbage
+    # collected after Thread#join.
+    Thread.new do
+      test = %( {{ "some_string" | a_bad_filter }} )
+      Template.parse(test).render!
+      nil
+    end.join
+
+    GC.start
+
+    assert_equal([], (Symbol.all_symbols - current_symbols))
   end
 
   def test_does_not_add_drop_methods_to_symbol_table
-    assert_no_new_symbols do
-      assigns = { 'drop' => Drop.new }
-      assert_equal("", Template.parse("{{ drop.custom_method_1 }}", assigns).render!)
-      assert_equal("", Template.parse("{{ drop.custom_method_2 }}", assigns).render!)
-      assert_equal("", Template.parse("{{ drop.custom_method_3 }}", assigns).render!)
-    end
-  end
-
-  def assert_no_new_symbols
-    # Run once to trigger any first-time initialization which might create some symbols,
-    # for example autoload or lazy method parsing might create symbols on first execution.
-    yield
-
-    # Ensure no new symbols for further runs, i.e. the code does not leak symbols
     current_symbols = Symbol.all_symbols
-    yield
-    assert_equal([], Symbol.all_symbols - current_symbols)
+
+    assigns = { 'drop' => Drop.new }
+    assert_equal("", Template.parse("{{ drop.custom_method_1 }}", assigns).render!)
+    assert_equal("", Template.parse("{{ drop.custom_method_2 }}", assigns).render!)
+    assert_equal("", Template.parse("{{ drop.custom_method_3 }}", assigns).render!)
+
+    assert_equal([], (Symbol.all_symbols - current_symbols))
   end
 
   def test_max_depth_nested_blocks_does_not_raise_exception