Parse macro invocations containing $

Author: ninevra

grammar.js

@@ -891,7 +891,23 @@ module.exports = grammar({
         $._reserved_identifier,
       )),
       '!',
-      $.token_tree
+      alias($.delim_token_tree, $.token_tree)
+    ),
+
+    delim_token_tree: $ => choice(
+      seq('(', repeat($._delim_tokens), ')'),
+      seq('[', repeat($._delim_tokens), ']'),
+      seq('{', repeat($._delim_tokens), '}')
+    ),
+
+    _delim_tokens: $ => choice(
+      $._non_delim_token,
+      alias($.delim_token_tree, $.token_tree),
+    ),
+
+    _non_delim_token: $ => choice(
+      $._non_special_token,
+      '$'
     ),
 
     scoped_identifier: $ => seq(

src/grammar.json

@@ -4927,9 +4927,110 @@
           "type": "STRING",
           "value": "!"
         },
+        {
+          "type": "ALIAS",
+          "content": {
+            "type": "SYMBOL",
+            "name": "delim_token_tree"
+          },
+          "named": true,
+          "value": "token_tree"
+        }
+      ]
+    },
+    "delim_token_tree": {
+      "type": "CHOICE",
+      "members": [
+        {
+          "type": "SEQ",
+          "members": [
+            {
+              "type": "STRING",
+              "value": "("
+            },
+            {
+              "type": "REPEAT",
+              "content": {
+                "type": "SYMBOL",
+                "name": "_delim_tokens"
+              }
+            },
+            {
+              "type": "STRING",
+              "value": ")"
+            }
+          ]
+        },
+        {
+          "type": "SEQ",
+          "members": [
+            {
+              "type": "STRING",
+              "value": "["
+            },
+            {
+              "type": "REPEAT",
+              "content": {
+                "type": "SYMBOL",
+                "name": "_delim_tokens"
+              }
+            },
+            {
+              "type": "STRING",
+              "value": "]"
+            }
+          ]
+        },
+        {
+          "type": "SEQ",
+          "members": [
+            {
+              "type": "STRING",
+              "value": "{"
+            },
+            {
+              "type": "REPEAT",
+              "content": {
+                "type": "SYMBOL",
+                "name": "_delim_tokens"
+              }
+            },
+            {
+              "type": "STRING",
+              "value": "}"
+            }
+          ]
+        }
+      ]
+    },
+    "_delim_tokens": {
+      "type": "CHOICE",
+      "members": [
         {
           "type": "SYMBOL",
-          "name": "token_tree"
+          "name": "_non_delim_token"
+        },
+        {
+          "type": "ALIAS",
+          "content": {
+            "type": "SYMBOL",
+            "name": "delim_token_tree"
+          },
+          "named": true,
+          "value": "token_tree"
+        }
+      ]
+    },
+    "_non_delim_token": {
+      "type": "CHOICE",
+      "members": [
+        {
+          "type": "SYMBOL",
+          "name": "_non_special_token"
+        },
+        {
+          "type": "STRING",
+          "value": "$"
         }
       ]
     },