alias decltype_auto to decltype

grammar.js

@@ -59,7 +59,7 @@ module.exports = grammar(C, {
 
     placeholder_type_specifier: $ => seq(
       field('constraint', optional($._type_specifier)),
-      choice($.auto, $.decltype_auto)
+      choice($.auto, alias($.decltype_auto, $.decltype))
     ),
 
     auto: $ => 'auto',

src/grammar.json

@@ -7496,8 +7496,13 @@
               "name": "auto"
             },
             {
-              "type": "SYMBOL",
-              "name": "decltype_auto"
+              "type": "ALIAS",
+              "content": {
+                "type": "SYMBOL",
+                "name": "decltype_auto"
+              },
+              "named": true,
+              "value": "decltype"
             }
           ]
         }

src/node-types.json

@@ -1857,18 +1857,7 @@
         {
           "type": "_expression",
           "named": true
-        }
-      ]
-    }
-  },
-  {
-    "type": "decltype_auto",
-    "named": true,
-    "fields": {},
-    "children": {
-      "multiple": false,
-      "required": true,
-      "types": [
+        },
         {
           "type": "auto",
           "named": true
@@ -3532,7 +3521,7 @@
           "named": true
         },
         {
-          "type": "decltype_auto",
+          "type": "decltype",
           "named": true
         }
       ]

src/parser.c

@@ -719,7 +719,7 @@ static const char * const ts_symbol_names[] = {
   [sym_string_literal] = "string_literal",
   [sym__empty_declaration] = "_empty_declaration",
   [sym_placeholder_type_specifier] = "placeholder_type_specifier",
-  [sym_decltype_auto] = "decltype_auto",
+  [sym_decltype_auto] = "decltype",
   [sym_decltype] = "decltype",
   [sym_class_specifier] = "class_specifier",
   [sym__class_name] = "_class_name",
@@ -1131,7 +1131,7 @@ static const TSSymbol ts_symbol_map[] = {
   [sym_string_literal] = sym_string_literal,
   [sym__empty_declaration] = sym__empty_declaration,
   [sym_placeholder_type_specifier] = sym_placeholder_type_specifier,
-  [sym_decltype_auto] = sym_decltype_auto,
+  [sym_decltype_auto] = sym_decltype,
   [sym_decltype] = sym_decltype,
   [sym_class_specifier] = sym_class_specifier,
   [sym__class_name] = sym__class_name,

test/corpus/concepts.txt

@@ -426,7 +426,7 @@ Sortable decltype(auto) foo = i();
   (declaration
     (placeholder_type_specifier
       (type_identifier)
-      (decltype_auto
+      (decltype
         (auto)))
     (init_declarator
       (identifier)