clang-format: [JS/Java] ignore Objective-C constructs in JS & Java.

Summary:
Java and JavaScript support annotations and decorators, respectively, that use a leading "@" token. clang-format currently detects this as an Objective-C construct and applies special formatting, for example no whitespace around "=" operators. This change disables the distinction for Java and JavaScript, which leads to normal formatting of single line annotated and initialized properties.

Before:
    class X {
      @foo() bar=false;
    }

After:
    class X {
      @foo() bar = false;
    }

Reviewers: djasper, bkramer

Subscribers: klimek, cfe-commits

Differential Revision: https://reviews.llvm.org/D32532

llvm-svn: 301399

clang/lib/Format/TokenAnnotator.cpp

@@ -1120,7 +1120,11 @@ private:
                 Current.Type = TT_FunctionAnnotationRParen;
           }
         }
-    } else if (Current.is(tok::at) && Current.Next) {
+    } else if (Current.is(tok::at) && Current.Next &&
+               Style.Language != FormatStyle::LK_JavaScript &&
+               Style.Language != FormatStyle::LK_Java) {
+      // In Java & JavaScript, "@..." is a decorator or annotation. In ObjC, it
+      // marks declarations and properties that need special formatting.
       switch (Current.Next->Tok.getObjCKeywordID()) {
       case tok::objc_interface:
       case tok::objc_implementation:

clang/unittests/Format/FormatTestJS.cpp

@@ -1239,6 +1239,9 @@ TEST_F(FormatTestJS, MetadataAnnotations) {
                "}");
   verifyFormat("class X {}\n"
                "class Y {}");
+  verifyFormat("class X {\n"
+               "  @property() private isReply = false;\n"
+               "}\n");
 }
 
 TEST_F(FormatTestJS, TypeAliases) {