Add line numbers to warnings

lib/liquid/block.rb

@@ -32,7 +32,8 @@ module Liquid
 
               # fetch the tag from registered blocks
               if tag = Template.tags[$1]
-                new_tag = tag.parse($1, $2, tokens, @options)
+                markup = token.is_a?(Token) ? token.child($2) : $2
+                new_tag = tag.parse($1, markup, tokens, @options)
                 new_tag.line_number = token.line_number if token.is_a?(Token)
                 @blank &&= new_tag.blank?
                 @nodelist << new_tag
@@ -103,7 +104,8 @@ module Liquid
 
     def create_variable(token)
       token.scan(ContentOfVariable) do |content|
-        return Variable.new(content.first, @options)
+        markup = token.is_a?(Token) ? token.child(content.first) : content.first
+        return Variable.new(markup, @options)
       end
       raise SyntaxError.new(options[:locale].t("errors.syntax.variable_termination".freeze, :token => token, :tag_end => VariableEnd.inspect))
     end

lib/liquid/parser_switching.rb

@@ -8,6 +8,7 @@ module Liquid
         begin
           return strict_parse_with_error_context(markup)
         rescue SyntaxError => e
+          e.line_number = markup.line_number if markup.is_a?(Token)
           @warnings ||= []
           @warnings << e
           return lax_parse(markup)

lib/liquid/token.rb

@@ -10,5 +10,9 @@ module Liquid
     def raw
       "<raw>"
     end
+
+    def child(string)
+      Token.new(string, @line_number)
+    end
   end
 end

test/integration/error_handling_test.rb

@@ -121,6 +121,12 @@ class ErrorHandlingTest < Minitest::Test
     assert_equal '', template.render
   end
 
+  def test_warning_line_numbers
+    template = Liquid::Template.parse("{% if ~~~ %}\n{{%%%}}{% else %}\n{{ hello. }}{% endif %}", :error_mode => :warn, :line_numbers => true)
+    assert_equal 3, template.warnings.size
+    assert_equal [1,2,3], template.warnings.map(&:line_number)
+  end
+
   # Liquid should not catch Exceptions that are not subclasses of StandardError, like Interrupt and NoMemoryError
   def test_exceptions_propagate
     assert_raises Exception do