declare enum and more tests

source/parser.hera

@@ -5302,6 +5302,7 @@ TypeDeclarationRest
 # NOTE: These are all guaranteed to be preceded by a `declare` keyword
 TypeLexicalDeclaration
   __ LetOrConstOrVar TypeDeclarationBinding ( CommaDelimiter __ TypeDeclarationBinding )*
+  __ EnumDeclaration
   ClassSignature
   Namespace TrailingComment* IdentifierName DeclareBlock
   Module _ StringLiteral DeclareBlock?

test/types/declare.civet

@@ -67,6 +67,23 @@ describe "[TS] declare", ->
     }
   """
 
+  testCase """
+    declare enum
+    ---
+    declare enum Direction
+      Up
+      Down
+      Left
+      Right
+    ---
+    declare enum Direction {
+      Up,
+      Down,
+      Left,
+      Right,
+    }
+  """
+
   testCase """
     declare namespace
     ---

test/types/enum.civet

@@ -105,3 +105,32 @@ describe "[TS] enum", ->
     Direction[Direction["Right"] = 4] = "Right";
 
   """
+
+  testCase """
+    const enum
+    ---
+    const enum Direction
+      Up
+      Down
+      Left
+      Right
+    ---
+    const enum Direction {
+      Up,
+      Down,
+      Left,
+      Right,
+    }
+  """
+
+  testCase.js """
+    const enum js
+    ---
+    const enum Direction
+      Up
+      Down
+      Left
+      Right
+    ---
+
+  """