Bug 1793959 - Add DecoratorEmitter; r=mgaudet

This adds a stub DecoratorEmitter to the build system.

Differential Revision: https://phabricator.services.mozilla.com/D162139

js/src/frontend/DecoratorEmitter.cpp

@@ -0,0 +1,12 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "frontend/DecoratorEmitter.h"
+
+#include "frontend/BytecodeEmitter.h"
+
+using namespace js;
+using namespace js::frontend;
+
+DecoratorEmitter::DecoratorEmitter(BytecodeEmitter* bce) {}

js/src/frontend/DecoratorEmitter.h

@@ -0,0 +1,21 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef frontend_DecoratorEmitter_h
+#define frontend_DecoratorEmitter_h
+
+#include "mozilla/Attributes.h"
+
+namespace js::frontend {
+
+struct BytecodeEmitter;
+
+class MOZ_STACK_CLASS DecoratorEmitter {
+ public:
+  explicit DecoratorEmitter(BytecodeEmitter* bce);
+};
+
+} /* namespace js::frontend */
+
+#endif /* frontend_DecoratorEmitter_h */

js/src/frontend/moz.build

@@ -81,6 +81,10 @@ if CONFIG["JS_ENABLE_SMOOSH"]:
         "Frontend2.cpp",
     ]
 
+if CONFIG["ENABLE_DECORATORS"]:
+    UNIFIED_SOURCES += [
+        "DecoratorEmitter.cpp",
+    ]
 
 # Parser.cpp cannot be built in unified mode because of explicit
 #   template instantiations.