1 files changed, 61 insertions, 0 deletions
diff --git a/js/src/frontend/AbstractScopePtr.cpp b/js/src/frontend/AbstractScopePtr.cpp
new file mode 100644
index 0000000000..a2dd16a104
--- /dev/null
+++ b/js/src/frontend/AbstractScopePtr.cpp
@@ -0,0 +1,61 @@
+/* -*- 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/Assertions.h"
+
+#include "frontend/CompilationStencil.h"  // CompilationState
+#include "frontend/Stencil.h"
+#include "js/Vector.h"
+#include "vm/Scope.h"  // for FunctionScope
+
+using namespace js;
+using namespace js::frontend;
+
+ScopeStencil& AbstractScopePtr::scopeData() const {
+  MOZ_ASSERT(isScopeStencil());
+  return compilationState_.scopeData[index_];
+}
+
+ScopeKind AbstractScopePtr::kind() const {
+  if (isScopeStencil()) {
+    return scopeData().kind();
+  }
+  return compilationState_.scopeContext.enclosingScopeKind;
+}
+
+AbstractScopePtr AbstractScopePtr::enclosing() const {
+  MOZ_ASSERT(isScopeStencil());
+  return scopeData().enclosing(compilationState_);
+}
+
+bool AbstractScopePtr::hasEnvironment() const {
+  if (isScopeStencil()) {
+    return scopeData().hasEnvironment();
+  }
+  return compilationState_.scopeContext.enclosingScopeHasEnvironment;
+}
+
+bool AbstractScopePtr::isArrow() const {
+  MOZ_ASSERT(is<FunctionScope>());
+  if (isScopeStencil()) {
+    return scopeData().isArrow();
+  }
+  return compilationState_.scopeContext.enclosingScopeIsArrow;
+}
+
+#ifdef DEBUG
+bool AbstractScopePtr::hasNonSyntacticScopeOnChain() const {
+  if (isScopeStencil()) {
+    if (kind() == ScopeKind::NonSyntactic) {
+      return true;
+    }
+    return enclosing().hasNonSyntacticScopeOnChain();
+  }
+  return compilationState_.scopeContext.hasNonSyntacticScopeOnChain;
+}
+#endif