designate doc comments

Author: resolritter

corpus/source_files.txt

@@ -55,6 +55,25 @@ Line comments
 (source_file
   (line_comment))
 
+============================================
+Doc comments
+============================================
+
+/// Foo
+///
+/// # Description
+///
+/// * Bar
+
+----
+
+(source_file
+  (doc_comment)
+  (doc_comment)
+  (doc_comment)
+  (doc_comment)
+  (doc_comment)) 
+
 =====================================
 Greek letters in identifiers
 =====================================

grammar.js

@@ -38,7 +38,7 @@ const primitive_types = numeric_types.concat(['bool', 'str', 'char'])
 module.exports = grammar({
   name: 'rust',
 
-  extras: $ => [/\s/, $.line_comment, $.block_comment],
+  extras: $ => [/\s/, $.line_comment, $.block_comment, $.doc_comment],
 
   externals: $ => [
     $._string_content,
@@ -1425,13 +1425,12 @@ module.exports = grammar({
 
     boolean_literal: $ => choice('true', 'false'),
 
-    comment: $ => choice(
-      $.line_comment,
-      $.block_comment
-    ),
+    doc_comment: $ => token(seq(
+      '///', /.*/
+    )),
 
     line_comment: $ => token(seq(
-      '//', /.*/
+      new RegExp('\/\/[^\/]'), /.*/
     )),
 
     _path: $ => choice(