Bug 1688794 - Factor js::ScopeIndex to its own file. r=arai

Differential Revision: https://phabricator.services.mozilla.com/D120537

js/src/frontend/AbstractScopePtr.h

@@ -10,7 +10,7 @@
 #include "mozilla/Maybe.h"
 #include "mozilla/Variant.h"
 
-#include "frontend/TypedIndex.h"
+#include "frontend/ScopeIndex.h"
 #include "gc/Barrier.h"
 #include "gc/Rooting.h"
 #include "gc/Tracer.h"
@@ -30,18 +30,6 @@ struct CompilationGCOutput;
 class ScopeStencil;
 }  // namespace frontend
 
-class ScopeIndex : public frontend::TypedIndex<Scope> {
-  // Delegate constructors;
-  using Base = frontend::TypedIndex<Scope>;
-  using Base::Base;
-
-  static constexpr uint32_t InvalidIndex = UINT32_MAX;
-
- public:
-  static constexpr ScopeIndex invalid() { return ScopeIndex(InvalidIndex); }
-  bool isValid() const { return index != InvalidIndex; }
-};
-
 // An interface class to support Scope queries in the frontend without requiring
 // a GC Allocated scope to necessarily exist.
 //

js/src/frontend/ScopeIndex.h

@@ -0,0 +1,32 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: set ts=8 sts=2 et sw=2 tw=80:
+ * 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_ScopeIndex_h
+#define frontend_ScopeIndex_h
+
+#include <cstdint>  // uint32_t, UINT32_MAX
+
+#include "frontend/TypedIndex.h"  // TypedIndex
+
+namespace js {
+
+class Scope;
+
+class ScopeIndex : public frontend::TypedIndex<Scope> {
+  // Delegate constructors;
+  using Base = frontend::TypedIndex<Scope>;
+  using Base::Base;
+
+  static constexpr uint32_t InvalidIndex = UINT32_MAX;
+
+ public:
+  static constexpr ScopeIndex invalid() { return ScopeIndex(InvalidIndex); }
+  bool isValid() const { return index != InvalidIndex; }
+};
+
+} /* namespace js */
+
+#endif /* frontend_ScopeIndex_h */