Support interface and enum declaration with no body. (#330)

Fixes #329.

Author: JoeRobich

grammars/csharp.tmLanguage

@@ -1055,14 +1055,14 @@
         <key>begin</key>
         <string>(?=\benum\b)</string>
         <key>end</key>
-        <string>(?&lt;=\})</string>
+        <string>(?&lt;=\})|(?=;)</string>
         <key>patterns</key>
         <array>
           <dict>
             <key>begin</key>
             <string>(?=enum)</string>
             <key>end</key>
-            <string>(?=\{)</string>
+            <string>(?=\{)|(?=;)</string>
             <key>patterns</key>
             <array>
               <dict>
@@ -1190,7 +1190,7 @@
         <key>begin</key>
         <string>(?=\binterface\b)</string>
         <key>end</key>
-        <string>(?&lt;=\})</string>
+        <string>(?&lt;=\})|(?=;)</string>
         <key>patterns</key>
         <array>
           <dict>
@@ -1212,7 +1212,7 @@
               </dict>
             </dict>
             <key>end</key>
-            <string>(?=\{)</string>
+            <string>(?=\{)|(?=;)</string>
             <key>patterns</key>
             <array>
               <dict>

grammars/csharp.tmLanguage.cson

@@ -679,11 +679,11 @@ repository:
     ]
   "enum-declaration":
     begin: "(?=\\benum\\b)"
-    end: "(?<=\\})"
+    end: "(?<=\\})|(?=;)"
     patterns: [
       {
         begin: "(?=enum)"
-        end: "(?=\\{)"
+        end: "(?=\\{)|(?=;)"
         patterns: [
           {
             include: "#comment"
@@ -758,7 +758,7 @@ repository:
     ]
   "interface-declaration":
     begin: "(?=\\binterface\\b)"
-    end: "(?<=\\})"
+    end: "(?<=\\})|(?=;)"
     patterns: [
       {
         begin: '''
@@ -771,7 +771,7 @@ repository:
             name: "storage.type.interface.cs"
           "2":
             name: "entity.name.type.interface.cs"
-        end: "(?=\\{)"
+        end: "(?=\\{)|(?=;)"
         patterns: [
           {
             include: "#comment"

src/csharp.tmLanguage.yml

@@ -336,10 +336,10 @@ repository:
 
   enum-declaration:
     begin: (?=\benum\b)
-    end: (?<=\})
+    end: (?<=\})|(?=;)
     patterns:
     - begin: (?=enum)
-      end: (?=\{)
+      end: (?=\{)|(?=;)
       patterns:
       - include: '#comment'
       - match: (enum)\s+(@?[_[:alpha:]][_[:alnum:]]*)
@@ -375,7 +375,7 @@ repository:
 
   interface-declaration:
     begin: (?=\binterface\b)
-    end: (?<=\})
+    end: (?<=\})|(?=;)
     patterns:
     - begin: |-
         (?x)
@@ -384,7 +384,7 @@ repository:
       beginCaptures:
         '1': { name: storage.type.interface.cs }
         '2': { name: entity.name.type.interface.cs }
-      end: (?=\{)
+      end: (?=\{)|(?=;)
       patterns:
       - include: '#comment'
       - include: '#type-parameter-list'

test/enum.tests.ts

@@ -22,6 +22,17 @@ describe("Enums", () => {
                 Token.Punctuation.CloseBrace]);
         });
 
+        it("enum with no body", async () => {
+
+            const input = `enum E;`;
+            const tokens = await tokenize(input);
+
+            tokens.should.deep.equal([
+                Token.Keyword.Definition.Enum,
+                Token.Identifier.EnumName("E"),
+                Token.Punctuation.Semicolon]);
+        });
+
         it("enum with base type", async () => {
 
             const input = `enum E : byte { }`;

test/interface.tests.ts

@@ -22,6 +22,17 @@ describe("Interfaces", () => {
                 Token.Punctuation.CloseBrace]);
         });
 
+        it("interface with no body", async () => {
+
+            const input = `interface IFoo;`;
+            const tokens = await tokenize(input);
+
+            tokens.should.deep.equal([
+                Token.Keyword.Definition.Interface,
+                Token.Identifier.InterfaceName("IFoo"),
+                Token.Punctuation.Semicolon]);
+        });
+
         it("interface inheritance", async () => {
 
             const input = `