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diff --git a/js/src/builtin/Eval.h b/js/src/builtin/Eval.h
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+/* -*- 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 builtin_Eval_h
+#define builtin_Eval_h
+
+#include "NamespaceImports.h"
+
+#include "js/TypeDecls.h"
+
+namespace js {
+
+// The C++ native for 'eval' (ES5 15.1.2.1). The function is named "indirect
+// eval" because "direct eval" calls (as defined by the spec) will emit
+// JSOp::Eval which in turn calls DirectEval. Thus, even though IndirectEval is
+// the callee function object for *all* calls to eval, it is by construction
+// only ever called in the case indirect eval.
+extern MOZ_MUST_USE bool IndirectEval(JSContext* cx, unsigned argc, Value* vp);
+
+// Performs a direct eval of |v| (a string containing code, or another value
+// that will be vacuously returned), which must correspond to the currently-
+// executing stack frame, which must be a script frame.
+extern MOZ_MUST_USE bool DirectEval(JSContext* cx, HandleValue v,
+                                    MutableHandleValue vp);
+
+// True iff fun is a built-in eval function.
+extern bool IsAnyBuiltinEval(JSFunction* fun);
+
+}  // namespace js
+
+#endif /* builtin_Eval_h */