文件操作 - symbol-define-to-primitive.js
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文件: /usr/share/nodejs/core-js/internals/symbol-define-to-primitive.js
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var call = require('../internals/function-call'); var getBuiltIn = require('../internals/get-built-in'); var wellKnownSymbol = require('../internals/well-known-symbol'); var defineBuiltIn = require('../internals/define-built-in'); module.exports = function () { var Symbol = getBuiltIn('Symbol'); var SymbolPrototype = Symbol && Symbol.prototype; var valueOf = SymbolPrototype && SymbolPrototype.valueOf; var TO_PRIMITIVE = wellKnownSymbol('toPrimitive'); if (SymbolPrototype && !SymbolPrototype[TO_PRIMITIVE]) { // `Symbol.prototype[@@toPrimitive]` method // https://tc39.es/ecma262/#sec-symbol.prototype-@@toprimitive // eslint-disable-next-line no-unused-vars -- required for .length defineBuiltIn(SymbolPrototype, TO_PRIMITIVE, function (hint) { return call(valueOf, this); }, { arity: 1 }); } };
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