1 files changed, 53 insertions, 0 deletions
diff --git a/lib/coderay/scanners/json5.rb b/lib/coderay/scanners/json5.rb
new file mode 100644
index 0000000..8b0a8bd
--- /dev/null
+++ b/lib/coderay/scanners/json5.rb
@@ -0,0 +1,53 @@
+module CodeRay
+module Scanners
+  
+  # Scanner for JSON (JavaScript Object Notation).
+  #
+  # See http://json.org/ for a definition of the JSON lexic/grammar.
+  class JSON5 < RuleBasedScanner
+    
+    register_for :json5
+    file_extension 'json'
+    
+    KINDS_NOT_LOC = [
+      :float, :char, :content, :delimiter,
+      :error, :integer, :operator, :value,
+    ]  # :nodoc:
+    
+    ESCAPE = / [bfnrt\\"\/] /x  # :nodoc:
+    UNICODE_ESCAPE = / u[a-fA-F0-9]{4} /x  # :nodoc:
+    KEY = / (?> (?: [^\\"]+ | \\. )* ) " \s* : /mx
+    
+    state :initial do
+      on %r/ \s+ /x, :space
+      
+      on %r/ [:,\[{\]}] /x, :operator
+      
+      on %r/ " (?=#{KEY}) /x, push(:key),    :delimiter
+      on %r/ " /x,            push(:string), :delimiter
+      
+      on %r/ true | false | null /x, :value
+      on %r/ -? (?: 0 | [1-9]\d* ) (?: \.\d+ (?: e[-+]? \d+ )? | e[-+]? \d+ ) /ix, :float
+      on %r/ -? (?: 0 | [1-9]\d* ) (?: e[+-] \d+ )? /ix, :integer
+    end
+    
+    state :key, :string do
+      on %r/ [^\\"]+ /x, :content
+      
+      on %r/ " /x, :delimiter, pop
+      
+      on %r/ \\ (?: #{ESCAPE} | #{UNICODE_ESCAPE} ) /x, :char
+      on %r/ \\. /mx, :content
+      on %r/ \\ /x, :error, pop
+    end
+    
+    def close_groups encoder, states
+      if [:string, :key].include? states.last
+        encoder.end_group states.last
+      end
+    end
+    
+  end
+  
+end
+end