[TypeScript] Implement labeled tuple members

JavaScript/TypeScript.sublime-syntax

@@ -925,14 +925,43 @@ contexts:
           scope: punctuation.section.sequence.end.js
           pop: 1
         - include: comma-separator
-        - match: \.\.\.
-          scope: keyword.operator.spread.js
         - match: (?=\S)
           push:
             - ts-type-annotation-optional
             - ts-type-expression-end
             - ts-type-expression-end-no-line-terminator
             - ts-type-expression-begin
+            - ts-type-tuple-spread
+            - ts-type-tuple-possible-member-label
+
+  ts-type-tuple-possible-member-label:
+    - match: ''
+      branch_point: ts-type-tuple-member-label
+      branch:
+        - ts-type-tuple-member-label
+        - immediately-pop
+      pop: 1
+
+  ts-type-tuple-member-label:
+    - match: '{{identifier_name}}'
+      scope: variable.other.member.js
+      set:
+        - ts-type-tuple-member-label-separator
+        - ts-type-annotation-optional
+    - include: else-pop
+
+  ts-type-tuple-member-label-separator:
+    - match: ':'
+      scope: punctuation.separator.type.js
+      pop: 1
+    - match: (?=\S)
+      fail: ts-type-tuple-member-label
+
+  ts-type-tuple-spread:
+    - match: \.\.\.
+      scope: keyword.operator.spread.js
+      pop: 1
+    - include: else-pop
 
   ts-type-object:
     - match: \{

JavaScript/tests/syntax_test_typescript.ts

@@ -853,6 +853,37 @@ let x: [ any , any ? , ... any [] ];
 //                             ^^ storage.modifier.array
 //                                ^ punctuation.section.sequence.end
 
+let x: [ first: any, rest: ...any ];
+//^ keyword.declaration
+//  ^ meta.binding.name variable.other.readwrite
+//   ^ punctuation.separator.type
+//    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ meta.type
+//     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ meta.sequence
+//     ^ punctuation.section.sequence.begin
+//       ^^^^^ variable.other.member
+//            ^ punctuation.separator.type
+//              ^^^ support.type.any
+//                 ^ punctuation.separator.comma
+//                   ^^^^ variable.other.member
+//                       ^ punctuation.separator.type
+//                         ^^^ keyword.operator.spread
+//                            ^^^ support.type.any
+//                                ^ punctuation.section.sequence.end
+//                                 ^ punctuation.terminator.statement
+
+let x: [
+    typeof
+//  ^^^^^ variable.other.member
+    ?
+//  ^ storage.modifier.optional
+    :
+//  ^ punctuation.separator.type
+    ...
+//  ^^^ keyword.operator.spread
+    any
+//  ^^^ support.type.any
+];
+
 let x: any & any;
 //     ^^^^^^^^^ meta.type
 //     ^^^ support.type.any