Update class expression to accept anonymous declaration

Fixes #486

Author: sheetalkamat

TypeScript.YAML-tmLanguage

@@ -195,7 +195,7 @@ repository:
     - include: '#template'
     - include: '#comment'
     - include: '#function-expression'
-    - include: '#class-or-interface-declaration'
+    - include: '#class-expression'
     - include: '#arrow-function'
     - include: '#cast'
     - include: '#ternary-expression'
@@ -235,7 +235,8 @@ repository:
      - include: '#decorator'
      - include: '#var-expr'
      - include: '#function-declaration'
-     - include: '#class-or-interface-declaration'
+     - include: '#class-declaration'
+     - include: '#interface-declaration'
      - include: '#type-declaration'
      - include: '#enum-declaration'
      - include: '#namespace-declaration'
@@ -429,42 +430,53 @@ repository:
     - name: variable.other.readwrite.alias.ts
       match: ([_$[:alpha:]][_$[:alnum:]]*)
 
-  class-or-interface-declaration:
+  class-declaration:
+    name: meta.class.ts
+    begin: (?<!\.|\$)\b(?:(export)\s+)?\b(?:(abstract)\s+)?\b(class)\b(?=\s+|/[/*])
+    beginCaptures:
+      '1': { name: keyword.control.export.ts }
+      '2': { name: storage.modifier.ts }
+      '3': { name: storage.type.class.ts }
+    end: (?<=\})
     patterns:
-    - name: meta.class.ts
-      begin: (?<!\.|\$)\b(?:(export)\s+)?\b(?:(abstract)\s+)?\b(class)\b(?=\s+|/[/*])
-      beginCaptures:
-        '1': { name: keyword.control.export.ts }
-        '2': { name: storage.modifier.ts }
-        '3': { name: storage.type.class.ts }
-      end: (?<=\})
-      endCaptures:
-        '1': { name: punctuation.definition.block.ts }
-      patterns:
-      - include: '#comment'
-      - include: '#class-or-interface-heritage' # Must be before object-name to consume the "extends" keyword.
-      - match: '[_$[:alpha:]][_$[:alnum:]]*'
-        captures:
-          '0': { name: 'entity.name.type.class.ts' }
-      - include: '#type-parameters' # Must be applied after object-name e.g. interface KeyValuePair<K, V>
-      - include: '#class-or-interface-body'
-    - name: meta.interface.ts
-      begin: (?<!\.|\$)\b(?:(export)\s+)?\b(?:(abstract)\s+)?\b(interface)\b(?=\s+|/[/*])
-      beginCaptures:
-        '1': { name: keyword.control.export.ts }
-        '2': { name: storage.modifier.ts }
-        '3': { name: storage.type.interface.ts }
-      end: (?<=\})
-      endCaptures:
-        '1': { name: punctuation.definition.block.ts }
-      patterns:
-      - include: '#comment'
-      - include: '#class-or-interface-heritage' # Must be before object-name to consume the "extends" keyword.
-      - match: '[_$[:alpha:]][_$[:alnum:]]*'
-        captures:
-          '0': { name: 'entity.name.type.interface.ts' }
-      - include: '#type-parameters' # Must be applied after object-name e.g. interface KeyValuePair<K, V>
-      - include: '#class-or-interface-body'
+    - include: '#class-declaration-or-expression-patterns'
+
+  class-declaration-or-expression-patterns:
+    patterns:
+    - include: '#comment'
+    - include: '#class-or-interface-heritage' # Must be before object-name to consume the "extends" keyword.
+    - match: '[_$[:alpha:]][_$[:alnum:]]*'
+      captures:
+        '0': { name: 'entity.name.type.class.ts' }
+    - include: '#type-parameters' # Must be applied after object-name e.g. interface KeyValuePair<K, V>
+    - include: '#class-or-interface-body'
+
+  interface-declaration:
+    name: meta.interface.ts
+    begin: (?<!\.|\$)\b(?:(export)\s+)?\b(?:(abstract)\s+)?\b(interface)\b(?=\s+|/[/*])
+    beginCaptures:
+      '1': { name: keyword.control.export.ts }
+      '2': { name: storage.modifier.ts }
+      '3': { name: storage.type.interface.ts }
+    end: (?<=\})
+    patterns:
+    - include: '#comment'
+    - include: '#class-or-interface-heritage' # Must be before object-name to consume the "extends" keyword.
+    - match: '[_$[:alpha:]][_$[:alnum:]]*'
+      captures:
+        '0': { name: 'entity.name.type.interface.ts' }
+    - include: '#type-parameters' # Must be applied after object-name e.g. interface KeyValuePair<K, V>
+    - include: '#class-or-interface-body'
+ 
+  class-expression:
+    name: meta.class.ts
+    # allows anonymous class
+    begin: (?<!\.|\$)\b(class)\b(?=\s+|[<{]|/[/*])
+    beginCaptures:
+      '1': { name: storage.type.class.ts }
+    end: (?<=\})
+    patterns:
+    - include: '#class-declaration-or-expression-patterns'
 
   class-or-interface-heritage:
     begin: (?<!\.|\$)(?:\b(extends|implements)\b)(?!\$|\.)
@@ -1572,7 +1584,7 @@ repository:
     end: (?<=\))|(?=[;),}\]]|$|((?<!\.|\$)\bnew\b(?!\$|\.))|((?<!\.|\$)\bfunction((\s+[_$[:alpha:]][_$[:alnum:]]*)|(\s*[\(]))))
     patterns:
     - include: '#paren-expression'
-    - include: '#class-or-interface-declaration'
+    - include: '#class-declaration'
     - include: '#type'
 
   object-member: