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// TODO: Use native code and JSC intrinsics for everything in this file.
// It is primarily used for `internal/util`
const createSafeIterator = (factory, next) => {
class SafeIterator {
constructor(iterable) {
this._iterator = factory(iterable);
}
next() {
return next(this._iterator);
}
[Symbol.iterator]() {
return this;
}
}
Object.setPrototypeOf(SafeIterator.prototype, null);
Object.freeze(SafeIterator.prototype);
Object.freeze(SafeIterator);
return SafeIterator;
};
function getGetter(cls, getter) {
// TODO: __lookupGetter__ is deprecated, but Object.getOwnPropertyDescriptor doesn't work on built-ins like Typed Arrays.
return Function.prototype.call.bind(cls.prototype.__lookupGetter__(getter));
}
// function getterCaller(getter) {
// return val => {
// return val.constructor.prototype.__lookupGetter__(getter).call(val);
// };
// }
function uncurryThis(func) {
return Function.prototype.call.bind(func);
}
const copyProps = (src, dest) => {
Array.prototype.forEach.call(Reflect.ownKeys(src), key => {
if (!Reflect.getOwnPropertyDescriptor(dest, key)) {
Reflect.defineProperty(dest, key, Reflect.getOwnPropertyDescriptor(src, key));
}
});
};
const makeSafe = (unsafe, safe) => {
if (Symbol.iterator in unsafe.prototype) {
const dummy = new unsafe();
let next; // We can reuse the same `next` method.
Array.prototype.forEach.call(Reflect.ownKeys(unsafe.prototype), key => {
if (!Reflect.getOwnPropertyDescriptor(safe.prototype, key)) {
const desc = Reflect.getOwnPropertyDescriptor(unsafe.prototype, key);
if (
typeof desc.value === "function" &&
desc.value.length === 0 &&
Symbol.iterator in (Function.prototype.call.call(desc.value, dummy) || {})
) {
const createIterator = uncurryThis(desc.value);
next ??= uncurryThis(createIterator(dummy).next);
const SafeIterator = createSafeIterator(createIterator, next);
desc.value = function () {
return new SafeIterator(this);
};
}
Reflect.defineProperty(safe.prototype, key, desc);
}
});
} else copyProps(unsafe.prototype, safe.prototype);
copyProps(unsafe, safe);
Object.setPrototypeOf(safe.prototype, null);
Object.freeze(safe.prototype);
Object.freeze(safe);
return safe;
};
const StringIterator = Function.prototype.call.bind(String.prototype[Symbol.iterator]);
const StringIteratorPrototype = Reflect.getPrototypeOf(StringIterator(""));
function ErrorCaptureStackTrace(targetObject) {
const stack = new Error().stack;
// Remove the second line, which is this function
targetObject.stack = stack.replace(/.*\n.*/, "$1");
}
export default {
makeSafe, // exported for testing
Array,
ArrayFrom: Array.from,
ArrayIsArray: Array.isArray,
ArrayPrototypeFlat: Function.prototype.call.bind(Array.prototype.flat),
ArrayPrototypeFilter: Function.prototype.call.bind(Array.prototype.filter),
ArrayPrototypeForEach: Function.prototype.call.bind(Array.prototype.forEach),
ArrayPrototypeIncludes: Function.prototype.call.bind(Array.prototype.includes),
ArrayPrototypeIndexOf: Function.prototype.call.bind(Array.prototype.indexOf),
ArrayPrototypeJoin: Function.prototype.call.bind(Array.prototype.join),
ArrayPrototypeMap: Function.prototype.call.bind(Array.prototype.map),
ArrayPrototypePop: Function.prototype.call.bind(Array.prototype.pop),
ArrayPrototypePush: Function.prototype.call.bind(Array.prototype.push),
ArrayPrototypePushApply: Function.apply.bind(Array.prototype.push),
ArrayPrototypeSlice: Function.prototype.call.bind(Array.prototype.slice),
ArrayPrototypeSort: Function.prototype.call.bind(Array.prototype.sort),
ArrayPrototypeSplice: Function.prototype.call.bind(Array.prototype.splice),
ArrayPrototypeUnshift: Function.prototype.call.bind(Array.prototype.unshift),
BigIntPrototypeValueOf: Function.prototype.call.bind(BigInt.prototype.valueOf),
BooleanPrototypeValueOf: Function.prototype.call.bind(Boolean.prototype.valueOf),
DatePrototypeGetTime: Function.prototype.call.bind(Date.prototype.getTime),
DatePrototypeToISOString: Function.prototype.call.bind(Date.prototype.toISOString),
DatePrototypeToString: Function.prototype.call.bind(Date.prototype.toString),
ErrorCaptureStackTrace,
ErrorPrototypeToString: Function.prototype.call.bind(Error.prototype.toString),
FunctionPrototypeBind: Function.prototype.call.bind(Function.prototype.bind),
FunctionPrototypeCall: Function.prototype.call.bind(Function.prototype.call),
FunctionPrototypeToString: Function.prototype.call.bind(Function.prototype.toString),
JSONStringify: JSON.stringify,
MapPrototypeGetSize: getGetter(Map, "size"),
MapPrototypeEntries: Function.prototype.call.bind(Map.prototype.entries),
MapPrototypeValues: Function.prototype.call.bind(Map.prototype.values),
MapPrototypeKeys: Function.prototype.call.bind(Map.prototype.keys),
MathFloor: Math.floor,
MathMax: Math.max,
MathMin: Math.min,
MathRound: Math.round,
MathSqrt: Math.sqrt,
MathTrunc: Math.trunc,
Number,
NumberIsFinite: Number.isFinite,
NumberIsNaN: Number.isNaN,
NumberParseFloat: Number.parseFloat,
NumberParseInt: Number.parseInt,
NumberPrototypeToString: Function.prototype.call.bind(Number.prototype.toString),
NumberPrototypeValueOf: Function.prototype.call.bind(Number.prototype.valueOf),
Object,
ObjectAssign: Object.assign,
ObjectCreate: Object.create,
ObjectDefineProperty: Object.defineProperty,
ObjectEntries: Object.entries,
ObjectGetOwnPropertyDescriptor: Object.getOwnPropertyDescriptor,
ObjectGetOwnPropertyDescriptors: Object.getOwnPropertyDescriptors,
ObjectGetOwnPropertyNames: Object.getOwnPropertyNames,
ObjectGetOwnPropertySymbols: Object.getOwnPropertySymbols,
ObjectGetPrototypeOf: Object.getPrototypeOf,
ObjectIs: Object.is,
ObjectKeys: Object.keys,
ObjectPrototypeHasOwnProperty: Function.prototype.call.bind(Object.prototype.hasOwnProperty),
ObjectPrototypePropertyIsEnumerable: Function.prototype.call.bind(Object.prototype.propertyIsEnumerable),
ObjectPrototypeToString: Function.prototype.call.bind(Object.prototype.toString),
ObjectSeal: Object.seal,
ObjectSetPrototypeOf: Object.setPrototypeOf,
ReflectApply: Reflect.apply,
ReflectOwnKeys: Reflect.ownKeys,
RegExp,
RegExpPrototypeExec: Function.prototype.call.bind(RegExp.prototype.exec),
RegExpPrototypeSymbolReplace: Function.prototype.call.bind(RegExp.prototype[Symbol.replace]),
RegExpPrototypeSymbolSplit: Function.prototype.call.bind(RegExp.prototype[Symbol.split]),
RegExpPrototypeTest: Function.prototype.call.bind(RegExp.prototype.test),
RegExpPrototypeToString: Function.prototype.call.bind(RegExp.prototype.toString),
SafeStringIterator: createSafeIterator(StringIterator, Function.prototype.call.bind(StringIteratorPrototype.next)),
SafeMap: makeSafe(
Map,
class SafeMap extends Map {
constructor(i) {
super(i);
}
},
),
SafeSet: makeSafe(
Set,
class SafeSet extends Set {
constructor(i) {
super(i);
}
},
),
SetPrototypeGetSize: getGetter(Set, "size"),
SetPrototypeEntries: Function.prototype.call.bind(Set.prototype.entries),
SetPrototypeValues: Function.prototype.call.bind(Set.prototype.values),
String,
StringPrototypeCharCodeAt: Function.prototype.call.bind(String.prototype.charCodeAt),
StringPrototypeCodePointAt: Function.prototype.call.bind(String.prototype.codePointAt),
StringPrototypeEndsWith: Function.prototype.call.bind(String.prototype.endsWith),
StringPrototypeIncludes: Function.prototype.call.bind(String.prototype.includes),
StringPrototypeIndexOf: Function.prototype.call.bind(String.prototype.indexOf),
StringPrototypeLastIndexOf: Function.prototype.call.bind(String.prototype.lastIndexOf),
StringPrototypeMatch: Function.prototype.call.bind(String.prototype.match),
StringPrototypeNormalize: Function.prototype.call.bind(String.prototype.normalize),
StringPrototypePadEnd: Function.prototype.call.bind(String.prototype.padEnd),
StringPrototypePadStart: Function.prototype.call.bind(String.prototype.padStart),
StringPrototypeRepeat: Function.prototype.call.bind(String.prototype.repeat),
StringPrototypeReplace: Function.prototype.call.bind(String.prototype.replace),
StringPrototypeReplaceAll: Function.prototype.call.bind(String.prototype.replaceAll),
StringPrototypeSlice: Function.prototype.call.bind(String.prototype.slice),
StringPrototypeSplit: Function.prototype.call.bind(String.prototype.split),
StringPrototypeStartsWith: Function.prototype.call.bind(String.prototype.startsWith),
StringPrototypeToLowerCase: Function.prototype.call.bind(String.prototype.toLowerCase),
StringPrototypeTrim: Function.prototype.call.bind(String.prototype.trim),
StringPrototypeValueOf: Function.prototype.call.bind(String.prototype.valueOf),
SymbolPrototypeToString: Function.prototype.call.bind(Symbol.prototype.toString),
SymbolPrototypeValueOf: Function.prototype.call.bind(Symbol.prototype.valueOf),
SymbolIterator: Symbol.iterator,
SymbolFor: Symbol.for,
SymbolToStringTag: Symbol.toStringTag,
TypedArrayPrototypeGetLength: getGetter(Uint8Array, "length"),
TypedArrayPrototypeGetSymbolToStringTag: getGetter(Uint8Array, Symbol.toStringTag),
Uint8ClampedArray,
Uint8Array,
Uint16Array,
Uint32Array,
Int8Array,
Int16Array,
Int32Array,
Float32Array,
Float64Array,
BigUint64Array,
BigInt64Array,
uncurryThis,
};
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