Add block comments

grammar.js

@@ -12,6 +12,7 @@ module.exports = grammar({
   extras: ($) => [
     /\s+/,
     $.line_comment,
+    $.block_comment,
   ],
 
   rules: {
@@ -24,6 +25,8 @@ module.exports = grammar({
 
     line_comment: (_) => seq("//", /.*/),
 
+    block_comment: (_) => seq("/*", /[^*]*\*+([^/*][^*]*\*+)*/, '/'),
+
     // Definitions {{{
 
     assignment: ($) => seq(

src/grammar.json

@@ -34,6 +34,23 @@
         }
       ]
     },
+    "block_comment": {
+      "type": "SEQ",
+      "members": [
+        {
+          "type": "STRING",
+          "value": "/*"
+        },
+        {
+          "type": "PATTERN",
+          "value": "[^*]*\\*+([^/*][^*]*\\*+)*"
+        },
+        {
+          "type": "STRING",
+          "value": "/"
+        }
+      ]
+    },
     "assignment": {
       "type": "SEQ",
       "members": [
@@ -936,6 +953,10 @@
     {
       "type": "SYMBOL",
       "name": "line_comment"
+    },
+    {
+      "type": "SYMBOL",
+      "name": "block_comment"
     }
   ],
   "conflicts": [],

src/node-types.json

@@ -167,6 +167,11 @@
       }
     }
   },
+  {
+    "type": "block_comment",
+    "named": true,
+    "fields": {}
+  },
   {
     "type": "boolean_literal",
     "named": true,
@@ -648,6 +653,14 @@
     "type": "-",
     "named": false
   },
+  {
+    "type": "/",
+    "named": false
+  },
+  {
+    "type": "/*",
+    "named": false
+  },
   {
     "type": "//",
     "named": false

test/corpus/comments.txt

@@ -32,3 +32,92 @@ Multiple comments
 (source_file
   (line_comment)
   (line_comment))
+
+================================================================================
+Empty block comment
+================================================================================
+
+/**/
+
+--------------------------------------------------------------------------------
+
+(source_file
+  (block_comment))
+
+================================================================================
+Whitespace block comment
+================================================================================
+
+/*     */
+
+--------------------------------------------------------------------------------
+
+(source_file
+  (block_comment))
+
+================================================================================
+Block comment
+================================================================================
+
+/* This is a comment */
+
+--------------------------------------------------------------------------------
+
+(source_file
+  (block_comment))
+
+================================================================================
+Block comment with slashes
+================================================================================
+
+/* /// */
+
+--------------------------------------------------------------------------------
+
+(source_file
+  (block_comment))
+
+================================================================================
+Block comment with asterisks
+================================================================================
+
+/* *** */
+
+--------------------------------------------------------------------------------
+
+(source_file
+  (block_comment))
+
+================================================================================
+Block comment is not recursive
+================================================================================
+
+/* /* */
+
+--------------------------------------------------------------------------------
+
+(source_file
+  (block_comment))
+
+================================================================================
+Unterminated comment
+================================================================================
+
+/*
+
+--------------------------------------------------------------------------------
+
+(source_file
+  (ERROR))
+
+================================================================================
+Comment end-delimiter only
+================================================================================
+
+*/
+
+--------------------------------------------------------------------------------
+
+(source_file
+  (ERROR
+    (UNEXPECTED '*')))