mirror of
https://github.com/mozilla/gecko-dev.git
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268 lines
6.4 KiB
C++
268 lines
6.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* vim: set ts=8 sts=4 et sw=4 tw=99:
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef jsfuninlines_h___
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#define jsfuninlines_h___
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#include "jsfun.h"
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#include "jsscript.h"
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#include "vm/GlobalObject.h"
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#include "vm/ScopeObject-inl.h"
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#include "vm/String-inl.h"
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inline bool
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JSFunction::strict() const
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{
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return nonLazyScript()->strict;
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}
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inline void
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JSFunction::initAtom(JSAtom *atom)
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{
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atom_.init(atom);
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}
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inline void
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JSFunction::setGuessedAtom(JSAtom *atom)
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{
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JS_ASSERT(atom_ == NULL);
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JS_ASSERT(atom != NULL);
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JS_ASSERT(!hasGuessedAtom());
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atom_ = atom;
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flags |= HAS_GUESSED_ATOM;
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}
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inline JSObject *
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JSFunction::environment() const
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{
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JS_ASSERT(isInterpreted());
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return u.i.env_;
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}
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inline void
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JSFunction::setEnvironment(JSObject *obj)
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{
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JS_ASSERT(isInterpreted());
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*(js::HeapPtrObject *)&u.i.env_ = obj;
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}
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inline void
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JSFunction::initEnvironment(JSObject *obj)
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{
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JS_ASSERT(isInterpreted());
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((js::HeapPtrObject *)&u.i.env_)->init(obj);
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}
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inline void
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JSFunction::initNative(js::Native native, const JSJitInfo *data)
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{
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JS_ASSERT(native);
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u.n.native = native;
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u.n.jitinfo = data;
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}
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inline const JSJitInfo *
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JSFunction::jitInfo() const
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{
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JS_ASSERT(isNative());
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return u.n.jitinfo;
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}
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inline void
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JSFunction::setJitInfo(const JSJitInfo *data)
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{
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JS_ASSERT(isNative());
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u.n.jitinfo = data;
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}
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inline void
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JSFunction::initializeExtended()
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{
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JS_ASSERT(isExtended());
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JS_ASSERT(mozilla::ArrayLength(toExtended()->extendedSlots) == 2);
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toExtended()->extendedSlots[0].init(js::UndefinedValue());
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toExtended()->extendedSlots[1].init(js::UndefinedValue());
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}
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inline void
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JSFunction::initExtendedSlot(size_t which, const js::Value &val)
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{
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JS_ASSERT(which < mozilla::ArrayLength(toExtended()->extendedSlots));
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toExtended()->extendedSlots[which].init(val);
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}
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inline void
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JSFunction::setExtendedSlot(size_t which, const js::Value &val)
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{
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JS_ASSERT(which < mozilla::ArrayLength(toExtended()->extendedSlots));
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toExtended()->extendedSlots[which] = val;
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}
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inline const js::Value &
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JSFunction::getExtendedSlot(size_t which) const
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{
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JS_ASSERT(which < mozilla::ArrayLength(toExtended()->extendedSlots));
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return toExtended()->extendedSlots[which];
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}
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namespace js {
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extern JS_ALWAYS_INLINE bool
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SameTraceType(const Value &lhs, const Value &rhs)
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{
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return SameType(lhs, rhs) &&
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(lhs.isPrimitive() ||
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lhs.toObject().isFunction() == rhs.toObject().isFunction());
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}
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/* Valueified JS_IsConstructing. */
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static JS_ALWAYS_INLINE bool
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IsConstructing(const Value *vp)
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{
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#ifdef DEBUG
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JSObject *callee = &JS_CALLEE(cx, vp).toObject();
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if (callee->isFunction()) {
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JSFunction *fun = callee->toFunction();
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JS_ASSERT(fun->isNativeConstructor());
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} else {
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JS_ASSERT(callee->getClass()->construct != NULL);
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}
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#endif
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return vp[1].isMagic();
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}
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inline bool
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IsConstructing(CallReceiver call)
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{
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return IsConstructing(call.base());
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}
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inline const char *
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GetFunctionNameBytes(JSContext *cx, JSFunction *fun, JSAutoByteString *bytes)
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{
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JSAtom *atom = fun->atom();
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if (atom)
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return bytes->encodeLatin1(cx, atom);
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return js_anonymous_str;
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}
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extern JSBool
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Function(JSContext *cx, unsigned argc, Value *vp);
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extern bool
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IsBuiltinFunctionConstructor(JSFunction *fun);
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static inline JSObject *
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SkipScopeParent(JSObject *parent)
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{
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if (!parent)
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return NULL;
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while (parent->isScope())
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parent = &parent->asScope().enclosingScope();
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return parent;
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}
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inline bool
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CanReuseFunctionForClone(JSContext *cx, HandleFunction fun)
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{
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if (!fun->hasSingletonType())
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return false;
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if (fun->isInterpretedLazy()) {
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LazyScript *lazy = fun->lazyScript();
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if (lazy->hasBeenCloned())
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return false;
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lazy->setHasBeenCloned();
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} else {
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JSScript *script = fun->nonLazyScript();
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if (script->hasBeenCloned)
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return false;
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script->hasBeenCloned = true;
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}
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return true;
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}
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inline JSFunction *
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CloneFunctionObjectIfNotSingleton(JSContext *cx, HandleFunction fun, HandleObject parent,
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NewObjectKind newKind = GenericObject)
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{
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/*
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* For attempts to clone functions at a function definition opcode,
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* try to avoid the the clone if the function has singleton type. This
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* was called pessimistically, and we need to preserve the type's
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* property that if it is singleton there is only a single object
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* with its type in existence.
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*
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* For functions inner to run once lambda, it may be possible that
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* the lambda runs multiple times and we repeatedly clone it. In these
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* cases, fall through to CloneFunctionObject, which will deep clone
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* the function's script.
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*/
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if (CanReuseFunctionForClone(cx, fun)) {
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RootedObject obj(cx, SkipScopeParent(parent));
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if (!JSObject::setParent(cx, fun, obj))
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return NULL;
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fun->setEnvironment(parent);
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return fun;
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}
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// These intermediate variables are needed to avoid link errors on some
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// platforms. Sigh.
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gc::AllocKind finalizeKind = JSFunction::FinalizeKind;
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gc::AllocKind extendedFinalizeKind = JSFunction::ExtendedFinalizeKind;
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gc::AllocKind kind = fun->isExtended()
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? extendedFinalizeKind
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: finalizeKind;
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return CloneFunctionObject(cx, fun, parent, kind, newKind);
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}
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} /* namespace js */
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inline void
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JSFunction::setScript(JSScript *script_)
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{
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JS_ASSERT(isInterpreted());
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mutableScript() = script_;
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}
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inline void
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JSFunction::initScript(JSScript *script_)
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{
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JS_ASSERT(isInterpreted());
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mutableScript().init(script_);
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}
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inline void
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JSFunction::initLazyScript(js::LazyScript *lazy)
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{
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JS_ASSERT(isInterpreted());
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flags &= ~INTERPRETED;
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flags |= INTERPRETED_LAZY;
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u.i.s.lazy_ = lazy;
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}
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inline JSObject *
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JSFunction::getBoundFunctionTarget() const
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{
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JS_ASSERT(isFunction());
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JS_ASSERT(isBoundFunction());
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/* Bound functions abuse |parent| to store their target function. */
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return getParent();
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}
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inline bool
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js::Class::isCallable() const
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{
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return this == &js::FunctionClass || call;
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}
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#endif /* jsfuninlines_h___ */
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