add in type parameters to map set and list literals

grammar.js

@@ -230,6 +230,7 @@ module.exports = grammar({
         [$._top_level_definition, $.const_object_expression, $._final_const_var_or_type],
         [$._final_const_var_or_type, $.const_object_expression],
         [$._final_const_var_or_type],
+        [$.type_parameter, $._type_name],
         // [$._expression_without_cascade, $._real_expression]
         // [$.constructor_signature, $._formal_parameter_part],
         // [$._unannotated_type, $.type_parameter],
@@ -588,12 +589,12 @@ module.exports = grammar({
         // ),
 
         list_literal: $ => seq(
-            '[',
+            optional($.type_arguments), '[',
             commaSepTrailingComma($._element),
             ']'
         ),
         set_or_map_literal: $ => seq(
-            '{',
+            optional($.type_arguments), '{',
             commaSepTrailingComma(
                 $._element
             ),

src/grammar.json

@@ -1821,6 +1821,18 @@
     "list_literal": {
       "type": "SEQ",
       "members": [
+        {
+          "type": "CHOICE",
+          "members": [
+            {
+              "type": "SYMBOL",
+              "name": "type_arguments"
+            },
+            {
+              "type": "BLANK"
+            }
+          ]
+        },
         {
           "type": "STRING",
           "value": "["
@@ -1879,6 +1891,18 @@
     "set_or_map_literal": {
       "type": "SEQ",
       "members": [
+        {
+          "type": "CHOICE",
+          "members": [
+            {
+              "type": "SYMBOL",
+              "name": "type_arguments"
+            },
+            {
+              "type": "BLANK"
+            }
+          ]
+        },
         {
           "type": "STRING",
           "value": "{"
@@ -9383,6 +9407,10 @@
     ],
     [
       "_final_const_var_or_type"
+    ],
+    [
+      "type_parameter",
+      "_type_name"
     ]
   ],
   "externals": [

src/node-types.json

@@ -6282,6 +6282,10 @@
           "type": "throw_expression",
           "named": true
         },
+        {
+          "type": "type_arguments",
+          "named": true
+        },
         {
           "type": "unary_expression",
           "named": true
@@ -8211,6 +8215,10 @@
           "type": "throw_expression",
           "named": true
         },
+        {
+          "type": "type_arguments",
+          "named": true
+        },
         {
           "type": "unary_expression",
           "named": true

test/corpus/dart.txt

@@ -194,3 +194,17 @@ final set = {"hello", "world"};
   (local_variable_declaration (initialized_variable_definition (identifier) 
     (set_or_map_literal (string_literal) (string_literal)))))
 
+==================================================
+collection literal type parameters
+==================================================
+
+final dynamic opts = <dynamic, dynamic>{
+  'transports': ['websocket'],
+  'forceNew': true,
+};
+
+---
+
+(program (local_variable_declaration (initialized_variable_definition (type_identifier) (identifier) 
+  (set_or_map_literal (type_arguments (type_identifier) (type_identifier)) (pair (string_literal) 
+    (list_literal (string_literal))) (pair (string_literal) (true))))))