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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 */
#include "js/GCAnnotations.h"
#include "js/Id.h"
#include "js/RootingAPI.h"
#include "js/String.h"
#include "jsapi.h"
class JSString;
struct JSContext;
namespace mozilla::dom {
* Holds a jsid that is initialized to a pinned string, with automatic
* conversion to Handle<jsid>, as it is held live forever by pinning.
class PinnedStringId {
jsid id;
constexpr PinnedStringId() : id(JSID_VOID) {}
bool init(JSContext* cx, const char* string) {
JSString* str = JS_AtomizeAndPinString(cx, string);
if (!str) {
return false;
id = JS::PropertyKey::fromPinnedString(str);
return true;
operator const jsid&() const { return id; }
operator JS::Handle<jsid>() const {
/* This is safe because we have pinned the string. */
return JS::Handle<jsid>::fromMarkedLocation(&id);
} // namespace mozilla::dom