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lib: save a reference to intrinsic constructs #12981

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lib: save a reference to intrinsic constructs #12981

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11 changes: 11 additions & 0 deletions lib/internal/util.js
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Expand Up @@ -278,3 +278,14 @@ promisify.custom = kCustomPromisifiedSymbol;

exports.promisify = promisify;
exports.customPromisifyArgs = kCustomPromisifyArgsSymbol;

exports.intrinsic = {
FunctionApply: Function.prototype.apply,
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@TimothyGu TimothyGu May 12, 2017 •
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I just realized: it's impossible to actually save a pristine and usable Function.prototype.apply method in JS, since one can just change Function.prototype.apply.call and Function.prototype.apply.apply… That's probably why V8 Extras supply an uncurryThis() function.

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@daurnimator daurnimator May 12, 2017

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Reflect.apply is the correct answer to this.

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@TimothyGu TimothyGu May 12, 2017

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Ah, right.

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@jasnell jasnell May 12, 2017

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Sadly I just realized that util.promisify did not follow the module.exports = {} pattern and should be updated. For new exports from this module, can you use the module.exports = {} above rather than the exports.whatever = ... model?

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@refack refack May 12, 2017

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Ack.
Ref: #12712

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@jasnell jasnell May 12, 2017

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I'll be opening a pr to fix up the promisify export, btw

FunctionCall: Function.prototype.call,
ObjectAssign: Object.assign,
ObjectSetPrototypeOf: Object.setPrototypeOf,
Object: Object,
Array: Array,
ObjectPrototype: Object.assign({}, Object.prototype),
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@TimothyGu TimothyGu May 12, 2017

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I'd rather save the prototype methods individually, and set ObjectPrototype to the initial Object.prototype.

ArrayPrototype: Object.assign({}, Array.prototype)
};