1 files changed, 66 insertions, 0 deletions
diff --git a/js/src/frontend/AbstractScopePtr.cpp b/js/src/frontend/AbstractScopePtr.cpp
new file mode 100644
index 0000000000..5d147bfb75
--- /dev/null
+++ b/js/src/frontend/AbstractScopePtr.cpp
@@ -0,0 +1,66 @@
+/* -*- 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/. */
+
+#include "frontend/AbstractScopePtr.h"
+
+#include "mozilla/Maybe.h"
+
+#include "frontend/CompilationInfo.h"  // CompilationState
+#include "frontend/Stencil.h"
+#include "js/GCPolicyAPI.h"
+#include "js/GCVariant.h"
+
+using namespace js;
+using namespace js::frontend;
+
+ScopeStencil& AbstractScopePtr::scopeData() const {
+  const Deferred& data = scope_.as<Deferred>();
+  return data.compilationState.scopeData[data.index];
+}
+
+CompilationState& AbstractScopePtr::compilationState() const {
+  const Deferred& data = scope_.as<Deferred>();
+  return data.compilationState;
+}
+
+ScopeKind AbstractScopePtr::kind() const {
+  MOZ_ASSERT(!isNullptr());
+  if (isScopeStencil()) {
+    return scopeData().kind();
+  }
+  return scope()->kind();
+}
+
+AbstractScopePtr AbstractScopePtr::enclosing() const {
+  MOZ_ASSERT(!isNullptr());
+  if (isScopeStencil()) {
+    return scopeData().enclosing(compilationState());
+  }
+  return AbstractScopePtr(scope()->enclosing());
+}
+
+bool AbstractScopePtr::hasEnvironment() const {
+  MOZ_ASSERT(!isNullptr());
+  if (isScopeStencil()) {
+    return scopeData().hasEnvironment();
+  }
+  return scope()->hasEnvironment();
+}
+
+bool AbstractScopePtr::isArrow() const {
+  // nullptr will also fail the below assert, so effectively also checking
+  // !isNullptr()
+  MOZ_ASSERT(is<FunctionScope>());
+  if (isScopeStencil()) {
+    return scopeData().isArrow();
+  }
+  MOZ_ASSERT(scope()->as<FunctionScope>().canonicalFunction());
+  return scope()->as<FunctionScope>().canonicalFunction()->isArrow();
+}
+
+void AbstractScopePtr::trace(JSTracer* trc) {
+  JS::GCPolicy<ScopeType>::trace(trc, &scope_, "AbstractScopePtr");
+}