static JSBool
ArgSetter(JSContext *cx, HandleObject obj, HandleId id, JSBool strict, Value *vp)
{
if (!obj->isNormalArguments())
return true;
NormalArgumentsObject &argsobj = obj->asNormalArguments();
if (JSID_IS_INT(id)) {
unsigned arg = unsigned(JSID_TO_INT(id));
if (arg < argsobj.initialLength()) {
if (StackFrame *fp = argsobj.maybeStackFrame()) {
JSScript *script = fp->functionScript();
JS_ASSERT(script->needsArgsObj());
if (arg < fp->numFormalArgs()) {
JS_ASSERT(fp->script()->formalIsAliased(arg));
types::TypeScript::SetArgument(cx, script, arg, *vp);
}
fp->canonicalActualArg(arg) = *vp;
return true;
}
}
} else {
JS_ASSERT(JSID_IS_ATOM(id, cx->runtime->atomState.lengthAtom) ||
JSID_IS_ATOM(id, cx->runtime->atomState.calleeAtom));
}
/*
* For simplicity we use delete/define to replace the property with one
* backed by the default Object getter and setter. Note that we rely on
* args_delProperty to clear the corresponding reserved slot so the GC can
* collect its value. Note also that we must define the property instead
* of setting it in case the user has changed the prototype to an object
* that has a setter for this id.
*/
RootedVarValue value(cx);
return baseops::DeleteGeneric(cx, obj, id, value.address(), false) &&
baseops::DefineProperty(cx, obj, id, vp, NULL, NULL, JSPROP_ENUMERATE);
}
