Allow type qualifier lists in pointer declarators

Fixes tree-sitter/tree-sitter-cpp#7

corpus/declarations.txt

@@ -135,6 +135,7 @@ Pointer variable declarations
 
 char *the_string;
 const char **the_strings;
+int const * const restrict x;
 
 ---
 
@@ -145,7 +146,11 @@ const char **the_strings;
   (declaration
     (type_qualifier)
     (primitive_type)
-    (pointer_declarator (pointer_declarator (identifier)))))
+    (pointer_declarator (pointer_declarator (identifier))))
+  (declaration
+    (primitive_type)
+    (type_qualifier)
+    (pointer_declarator (type_qualifier) (type_qualifier) (identifier))))
 
 ============================================
 Typedefs

grammar.js

@@ -201,10 +201,10 @@ module.exports = grammar({
       prec(1, seq('(', $._abstract_declarator, ')'))
     ),
 
-    pointer_declarator: $ => prec.right(seq('*', $._declarator)),
-    pointer_field_declarator: $ => prec.right(seq('*', $._field_declarator)),
-    pointer_type_declarator: $ => prec.right(seq('*', $._type_declarator)),
-    abstract_pointer_declarator: $ => prec.right(seq('*', optional($._abstract_declarator))),
+    pointer_declarator: $ => prec.right(seq('*', repeat($.type_qualifier), $._declarator)),
+    pointer_field_declarator: $ => prec.right(seq('*', repeat($.type_qualifier), $._field_declarator)),
+    pointer_type_declarator: $ => prec.right(seq('*', repeat($.type_qualifier), $._type_declarator)),
+    abstract_pointer_declarator: $ => prec.right(seq('*', repeat($.type_qualifier), optional($._abstract_declarator))),
 
     function_declarator: $ => prec(1, seq($._declarator, $.parameter_list)),
     function_field_declarator: $ => prec(1, seq($._field_declarator, $.parameter_list)),

src/grammar.json

@@ -1363,6 +1363,13 @@
             "type": "STRING",
             "value": "*"
           },
+          {
+            "type": "REPEAT",
+            "content": {
+              "type": "SYMBOL",
+              "name": "type_qualifier"
+            }
+          },
           {
             "type": "SYMBOL",
             "name": "_declarator"
@@ -1380,6 +1387,13 @@
             "type": "STRING",
             "value": "*"
           },
+          {
+            "type": "REPEAT",
+            "content": {
+              "type": "SYMBOL",
+              "name": "type_qualifier"
+            }
+          },
           {
             "type": "SYMBOL",
             "name": "_field_declarator"
@@ -1397,6 +1411,13 @@
             "type": "STRING",
             "value": "*"
           },
+          {
+            "type": "REPEAT",
+            "content": {
+              "type": "SYMBOL",
+              "name": "type_qualifier"
+            }
+          },
           {
             "type": "SYMBOL",
             "name": "_type_declarator"
@@ -1414,6 +1435,13 @@
             "type": "STRING",
             "value": "*"
           },
+          {
+            "type": "REPEAT",
+            "content": {
+              "type": "SYMBOL",
+              "name": "type_qualifier"
+            }
+          },
           {
             "type": "CHOICE",
             "members": [