Extended G-code syntax

- Parenthesized comments
- Multiple E values split by colons (RepRapFirmware)

buildroot/share/sublime/RepRapTools/G-Code.sublime-syntax

         2: punctuation.quote.double.open.gcode
       push: gcode_string_arg_quoted_double
 
+    # parameter and list of values
+    - match: ([Ee])\s*(({{decimal}}\s*:\s*)+{{decimal}})
+      captures:
+        1: keyword.param.gcode
+        2: constant.numeric.param.gcode
+
     # parameter and numeric value
     - match: ([A-Za-z])\s*({{decimal}})
       captures:
     - match: \s*;
       scope: punctuation.comment.eol.start
       set: gcode_comment
+    - match: \s*\(
+      scope: punctuation.paren.comment.open
+      push: gcode_comment_paren
 
   # Comment to end of line.
   gcode_comment:
     - match: \s*$
       pop: true
 
+  gcode_comment_paren:
+    - meta_content_scope: paren.comment.gcode
+
+    - match: '[^)]+'
+
+    - match: '[)]'
+      scope: punctuation.paren.comment.close
+      pop: true
+
+    - match: \s*$
+      pop: true
+
   # Everything after this point is broken by a syntax error
   syntax_error:
     - meta_scope: invalid.error.syntax.gcode

buildroot/share/sublime/RepRapTools/syntax_test_G-code.gcode

 ;   ^constant.numeric.param.gcode
 ;              ^comment
 
+T0 (This is a comment) S12
+;^entity.command.gcode
+;  ^punctuation.paren.comment.open
+;   ^paren.comment.gcode
+;                    ^punctuation.paren.comment.close
+;                      ^keyword.param.gcode
+;                       ^constant.numeric.param.gcode
+
 M20 P'/path/to/macro/macro.g' R12
 ;<-entity.command.gcode
 ;^constant.numeric.command.gcode
 ;    ^punctuation.quote.single.open.gcode
 ;       ^string.quoted.single.gcode
 ;                           ^punctuation.quote.single.close.gcode
+;                             ^keyword.param.gcode
+;                              ^constant.numeric.param.gcode
 
 M117 This is a message   ; and comment
 ;<-entity.command.gcode
 ;                ^constant.numeric.checksum.gcode
 ;                  ^invalid.error.syntax.gcode
 
-N234 M107 *64
+N234 M107 *64     
 ;              ^-invalid.error.syntax.gcode
 
+M92 E304.5:304.5:420:420:420:420 ; EOL Comment
+;<-entity.command.gcode
+;^constant.numeric.command.gcode
+;   ^keyword.param.gcode
+;    ^constant.numeric.param.gcode
+;             ^constant.numeric.param.gcode
+;                                ^punctuation.comment.eol.start
+;                                 ^comment.gcode