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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/. */
#include "builtin/Reflect.h"
#include "jsapi.h"
#include "builtin/Object.h"
#include "jit/InlinableNatives.h"
#include "js/friend/ErrorMessages.h" // js::GetErrorMessage, JSMSG_NOT_EXPECTED_TYPE
#include "js/PropertySpec.h"
#include "vm/GlobalObject.h"
#include "vm/JSContext.h"
#include "vm/PlainObject.h"
#include "vm/GeckoProfiler-inl.h"
#include "vm/JSObject-inl.h"
#include "vm/ObjectOperations-inl.h"
using namespace js;
/*** Reflect methods ********************************************************/
/* ES6 26.1.4 Reflect.deleteProperty (target, propertyKey) */
static bool Reflect_deleteProperty(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
// Step 1.
RootedObject target(
cx,
RequireObjectArg(cx, "`target`", "Reflect.deleteProperty", args.get(0)));
if (!target) {
return false;
}
// Steps 2-3.
RootedValue propertyKey(cx, args.get(1));
RootedId key(cx);
if (!ToPropertyKey(cx, propertyKey, &key)) {
return false;
}
// Step 4.
ObjectOpResult result;
if (!DeleteProperty(cx, target, key, result)) {
return false;
}
args.rval().setBoolean(result.ok());
return true;
}
/* ES6 26.1.8 Reflect.getPrototypeOf(target) */
bool js::Reflect_getPrototypeOf(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
// Step 1.
RootedObject target(
cx,
RequireObjectArg(cx, "`target`", "Reflect.getPrototypeOf", args.get(0)));
if (!target) {
return false;
}
// Step 2.
RootedObject proto(cx);
if (!GetPrototype(cx, target, &proto)) {
return false;
}
args.rval().setObjectOrNull(proto);
return true;
}
/* ES6 draft 26.1.10 Reflect.isExtensible(target) */
bool js::Reflect_isExtensible(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
// Step 1.
RootedObject target(
cx,
RequireObjectArg(cx, "`target`", "Reflect.isExtensible", args.get(0)));
if (!target) {
return false;
}
// Step 2.
bool extensible;
if (!IsExtensible(cx, target, &extensible)) {
return false;
}
args.rval().setBoolean(extensible);
return true;
}
// ES2018 draft rev c164be80f7ea91de5526b33d54e5c9321ed03d3f
// 26.1.10 Reflect.ownKeys ( target )
bool js::Reflect_ownKeys(JSContext* cx, unsigned argc, Value* vp) {
AutoJSMethodProfilerEntry pseudoFrame(cx, "Reflect", "ownKeys");
CallArgs args = CallArgsFromVp(argc, vp);
// Step 1.
RootedObject target(
cx, RequireObjectArg(cx, "`target`", "Reflect.ownKeys", args.get(0)));
if (!target) {
return false;
}
// Steps 2-3.
return GetOwnPropertyKeys(
cx, target, JSITER_OWNONLY | JSITER_HIDDEN | JSITER_SYMBOLS, args.rval());
}
/* ES6 26.1.12 Reflect.preventExtensions(target) */
static bool Reflect_preventExtensions(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
// Step 1.
RootedObject target(
cx, RequireObjectArg(cx, "`target`", "Reflect.preventExtensions",
args.get(0)));
if (!target) {
return false;
}
// Step 2.
ObjectOpResult result;
if (!PreventExtensions(cx, target, result)) {
return false;
}
args.rval().setBoolean(result.ok());
return true;
}
/* ES6 26.1.13 Reflect.set(target, propertyKey, V [, receiver]) */
static bool Reflect_set(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
// Step 1.
RootedObject target(
cx, RequireObjectArg(cx, "`target`", "Reflect.set", args.get(0)));
if (!target) {
return false;
}
// Steps 2-3.
RootedValue propertyKey(cx, args.get(1));
RootedId key(cx);
if (!ToPropertyKey(cx, propertyKey, &key)) {
return false;
}
// Step 4.
RootedValue receiver(cx, args.length() > 3 ? args[3] : args.get(0));
// Step 5.
ObjectOpResult result;
RootedValue value(cx, args.get(2));
if (!SetProperty(cx, target, key, value, receiver, result)) {
return false;
}
args.rval().setBoolean(result.ok());
return true;
}
/*
* ES6 26.1.3 Reflect.setPrototypeOf(target, proto)
*
* The specification is not quite similar enough to Object.setPrototypeOf to
* share code.
*/
static bool Reflect_setPrototypeOf(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
// Step 1.
RootedObject obj(cx, RequireObjectArg(cx, "`target`",
"Reflect.setPrototypeOf", args.get(0)));
if (!obj) {
return false;
}
// Step 2.
if (!args.get(1).isObjectOrNull()) {
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr,
JSMSG_NOT_EXPECTED_TYPE, "Reflect.setPrototypeOf",
"an object or null",
InformalValueTypeName(args.get(1)));
return false;
}
RootedObject proto(cx, args.get(1).toObjectOrNull());
// Step 4.
ObjectOpResult result;
if (!SetPrototype(cx, obj, proto, result)) {
return false;
}
args.rval().setBoolean(result.ok());
return true;
}
static const JSFunctionSpec reflect_methods[] = {
JS_SELF_HOSTED_FN("apply", "Reflect_apply", 3, 0),
JS_SELF_HOSTED_FN("construct", "Reflect_construct", 2, 0),
JS_SELF_HOSTED_FN("defineProperty", "Reflect_defineProperty", 3, 0),
JS_FN("deleteProperty", Reflect_deleteProperty, 2, 0),
JS_SELF_HOSTED_FN("get", "Reflect_get", 2, 0),
JS_SELF_HOSTED_FN("getOwnPropertyDescriptor",
"Reflect_getOwnPropertyDescriptor", 2, 0),
JS_INLINABLE_FN("getPrototypeOf", Reflect_getPrototypeOf, 1, 0,
ReflectGetPrototypeOf),
JS_SELF_HOSTED_FN("has", "Reflect_has", 2, 0),
JS_FN("isExtensible", Reflect_isExtensible, 1, 0),
JS_FN("ownKeys", Reflect_ownKeys, 1, 0),
JS_FN("preventExtensions", Reflect_preventExtensions, 1, 0),
JS_FN("set", Reflect_set, 3, 0),
JS_FN("setPrototypeOf", Reflect_setPrototypeOf, 2, 0),
JS_FS_END};
static const JSPropertySpec reflect_properties[] = {
JS_STRING_SYM_PS(toStringTag, "Reflect", JSPROP_READONLY), JS_PS_END};
/*** Setup ******************************************************************/
static JSObject* CreateReflectObject(JSContext* cx, JSProtoKey key) {
RootedObject proto(cx, &cx->global()->getObjectPrototype());
return NewPlainObjectWithProto(cx, proto, TenuredObject);
}
static const ClassSpec ReflectClassSpec = {CreateReflectObject, nullptr,
reflect_methods, reflect_properties};
const JSClass js::ReflectClass = {"Reflect", 0, JS_NULL_CLASS_OPS,
&ReflectClassSpec};
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