Merge pull request #120 from infospace/interpolate_regex_once

add interpolate once flag to regexes that never change

lib/liquid.rb

@@ -32,17 +32,17 @@ module Liquid
   VariableEnd                 = /\}\}/
   VariableIncompleteEnd       = /\}\}?/
   QuotedString                = /"[^"]*"|'[^']*'/
-  QuotedFragment              = /#{QuotedString}|(?:[^\s,\|'"]|#{QuotedString})+/
+  QuotedFragment              = /#{QuotedString}|(?:[^\s,\|'"]|#{QuotedString})+/o
   StrictQuotedFragment        = /"[^"]+"|'[^']+'|[^\s|:,]+/
-  FirstFilterArgument         = /#{FilterArgumentSeparator}(?:#{StrictQuotedFragment})/
+  FirstFilterArgument         = /#{FilterArgumentSeparator}(?:#{StrictQuotedFragment})/o
-  OtherFilterArgument         = /#{ArgumentSeparator}(?:#{StrictQuotedFragment})/
+  OtherFilterArgument         = /#{ArgumentSeparator}(?:#{StrictQuotedFragment})/o
-  SpacelessFilter             = /^(?:'[^']+'|"[^"]+"|[^'"])*#{FilterSeparator}(?:#{StrictQuotedFragment})(?:#{FirstFilterArgument}(?:#{OtherFilterArgument})*)?/
+  SpacelessFilter             = /^(?:'[^']+'|"[^"]+"|[^'"])*#{FilterSeparator}(?:#{StrictQuotedFragment})(?:#{FirstFilterArgument}(?:#{OtherFilterArgument})*)?/o
-  Expression                  = /(?:#{QuotedFragment}(?:#{SpacelessFilter})*)/
+  Expression                  = /(?:#{QuotedFragment}(?:#{SpacelessFilter})*)/o
-  TagAttributes               = /(\w+)\s*\:\s*(#{QuotedFragment})/
+  TagAttributes               = /(\w+)\s*\:\s*(#{QuotedFragment})/o
   AnyStartingTag              = /\{\{|\{\%/
-  PartialTemplateParser       = /#{TagStart}.*?#{TagEnd}|#{VariableStart}.*?#{VariableIncompleteEnd}/
+  PartialTemplateParser       = /#{TagStart}.*?#{TagEnd}|#{VariableStart}.*?#{VariableIncompleteEnd}/o
-  TemplateParser              = /(#{PartialTemplateParser}|#{AnyStartingTag})/
+  TemplateParser              = /(#{PartialTemplateParser}|#{AnyStartingTag})/o
-  VariableParser              = /\[[^\]]+\]|#{VariableSegment}+\??/
+  VariableParser              = /\[[^\]]+\]|#{VariableSegment}+\??/o
 end
 
 require 'liquid/drop'

lib/liquid/block.rb

@@ -1,10 +1,10 @@
 module Liquid
 
   class Block < Tag
-    IsTag             = /^#{TagStart}/
+    IsTag             = /^#{TagStart}/o
-    IsVariable        = /^#{VariableStart}/
+    IsVariable        = /^#{VariableStart}/o
-    FullToken         = /^#{TagStart}\s*(\w+)\s*(.*)?#{TagEnd}$/
+    FullToken         = /^#{TagStart}\s*(\w+)\s*(.*)?#{TagEnd}$/o
-    ContentOfVariable = /^#{VariableStart}(.*)#{VariableEnd}$/
+    ContentOfVariable = /^#{VariableStart}(.*)#{VariableEnd}$/o
 
     def parse(tokens)
       @nodelist ||= []

lib/liquid/htmltags.rb

@@ -1,6 +1,6 @@
 module Liquid
   class TableRow < Block
-    Syntax = /(\w+)\s+in\s+(#{QuotedFragment}+)/
+    Syntax = /(\w+)\s+in\s+(#{QuotedFragment}+)/o
 
     def initialize(tag_name, markup, tokens)
       if markup =~ Syntax

lib/liquid/tags/assign.rb

@@ -9,7 +9,7 @@ module Liquid
   #  {{ foo }}
   #
   class Assign < Tag
-    Syntax = /(#{VariableSignature}+)\s*=\s*(.*)\s*/   
+    Syntax = /(#{VariableSignature}+)\s*=\s*(.*)\s*/o
   
     def initialize(tag_name, markup, tokens)          
       if markup =~ Syntax

lib/liquid/tags/case.rb

@@ -1,7 +1,7 @@
 module Liquid
   class Case < Block
-    Syntax     = /(#{QuotedFragment})/
+    Syntax     = /(#{QuotedFragment})/o
-    WhenSyntax = /(#{QuotedFragment})(?:(?:\s+or\s+|\s*\,\s*)(#{QuotedFragment}.*))?/
+    WhenSyntax = /(#{QuotedFragment})(?:(?:\s+or\s+|\s*\,\s*)(#{QuotedFragment}.*))?/o
 
     def initialize(tag_name, markup, tokens)      
       @blocks = []

lib/liquid/tags/cycle.rb

@@ -13,8 +13,8 @@ module Liquid
   #    <div class="green"> Item five</div>
   #
   class Cycle < Tag
-    SimpleSyntax = /^#{QuotedFragment}+/        
+    SimpleSyntax = /^#{QuotedFragment}+/o
-    NamedSyntax  = /^(#{QuotedFragment})\s*\:\s*(.*)/
+    NamedSyntax  = /^(#{QuotedFragment})\s*\:\s*(.*)/o
   
     def initialize(tag_name, markup, tokens)      
       case markup
@@ -48,7 +48,7 @@ module Liquid
   
     def variables_from_string(markup)
       markup.split(',').collect do |var|
-    	  var =~ /\s*(#{QuotedFragment})\s*/
+    	  var =~ /\s*(#{QuotedFragment})\s*/o
     	  $1 ? $1 : nil
     	end.compact
     end

lib/liquid/tags/for.rb

@@ -44,7 +44,7 @@ module Liquid
   # forloop.last:: Returns true if the item is the last item.
   #
   class For < Block                                             
-    Syntax = /(\w+)\s+in\s+(#{QuotedFragment}+)\s*(reversed)?/   
+    Syntax = /(\w+)\s+in\s+(#{QuotedFragment}+)\s*(reversed)?/o
   
     def initialize(tag_name, markup, tokens)
       if markup =~ Syntax

lib/liquid/tags/if.rb

@@ -13,8 +13,8 @@ module Liquid
   #
   class If < Block
     SyntaxHelp = "Syntax Error in tag 'if' - Valid syntax: if [expression]"
-    Syntax = /(#{QuotedFragment})\s*([=!<>a-z_]+)?\s*(#{QuotedFragment})?/
+    Syntax = /(#{QuotedFragment})\s*([=!<>a-z_]+)?\s*(#{QuotedFragment})?/o
-    ExpressionsAndOperators = /(?:\b(?:\s?and\s?|\s?or\s?)\b|(?:\s*(?!\b(?:\s?and\s?|\s?or\s?)\b)(?:#{QuotedFragment}|\S+)\s*)+)/
+    ExpressionsAndOperators = /(?:\b(?:\s?and\s?|\s?or\s?)\b|(?:\s*(?!\b(?:\s?and\s?|\s?or\s?)\b)(?:#{QuotedFragment}|\S+)\s*)+)/o
 
     def initialize(tag_name, markup, tokens)
       @blocks = []

lib/liquid/tags/include.rb

@@ -1,6 +1,6 @@
 module Liquid
   class Include < Tag
-    Syntax = /(#{QuotedFragment}+)(\s+(?:with|for)\s+(#{QuotedFragment}+))?/
+    Syntax = /(#{QuotedFragment}+)(\s+(?:with|for)\s+(#{QuotedFragment}+))?/o
   
     def initialize(tag_name, markup, tokens)      
       if markup =~ Syntax

lib/liquid/variable.rb

@@ -11,7 +11,7 @@ module Liquid
   #   {{ user | link }}
   #
   class Variable
-    FilterParser = /(?:#{FilterSeparator}|(?:\s*(?!(?:#{FilterSeparator}))(?:#{QuotedFragment}|\S+)\s*)+)/
+    FilterParser = /(?:#{FilterSeparator}|(?:\s*(?!(?:#{FilterSeparator}))(?:#{QuotedFragment}|\S+)\s*)+)/o
     attr_accessor :filters, :name
 
     def initialize(markup)