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49 lines
2.3 KiB
49 lines
2.3 KiB
var fails = require('../internals/fails'); |
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var isCallable = require('../internals/is-callable'); |
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var hasOwn = require('../internals/has-own-property'); |
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var DESCRIPTORS = require('../internals/descriptors'); |
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var CONFIGURABLE_FUNCTION_NAME = require('../internals/function-name').CONFIGURABLE; |
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var inspectSource = require('../internals/inspect-source'); |
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var InternalStateModule = require('../internals/internal-state'); |
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var enforceInternalState = InternalStateModule.enforce; |
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var getInternalState = InternalStateModule.get; |
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// eslint-disable-next-line es-x/no-object-defineproperty -- safe |
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var defineProperty = Object.defineProperty; |
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var CONFIGURABLE_LENGTH = DESCRIPTORS && !fails(function () { |
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return defineProperty(function () { /* empty */ }, 'length', { value: 8 }).length !== 8; |
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}); |
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var TEMPLATE = String(String).split('String'); |
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var makeBuiltIn = module.exports = function (value, name, options) { |
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if (String(name).slice(0, 7) === 'Symbol(') { |
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name = '[' + String(name).replace(/^Symbol\(([^)]*)\)/, '$1') + ']'; |
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} |
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if (options && options.getter) name = 'get ' + name; |
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if (options && options.setter) name = 'set ' + name; |
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if (!hasOwn(value, 'name') || (CONFIGURABLE_FUNCTION_NAME && value.name !== name)) { |
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if (DESCRIPTORS) defineProperty(value, 'name', { value: name, configurable: true }); |
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else value.name = name; |
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} |
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if (CONFIGURABLE_LENGTH && options && hasOwn(options, 'arity') && value.length !== options.arity) { |
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defineProperty(value, 'length', { value: options.arity }); |
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} |
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try { |
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if (options && hasOwn(options, 'constructor') && options.constructor) { |
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if (DESCRIPTORS) defineProperty(value, 'prototype', { writable: false }); |
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// in V8 ~ Chrome 53, prototypes of some methods, like `Array.prototype.values`, are non-writable |
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} else if (value.prototype) value.prototype = undefined; |
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} catch (error) { /* empty */ } |
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var state = enforceInternalState(value); |
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if (!hasOwn(state, 'source')) { |
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state.source = TEMPLATE.join(typeof name == 'string' ? name : ''); |
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} return value; |
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}; |
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// add fake Function#toString for correct work wrapped methods / constructors with methods like LoDash isNative |
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// eslint-disable-next-line no-extend-native -- required |
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Function.prototype.toString = makeBuiltIn(function toString() { |
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return isCallable(this) && getInternalState(this).source || inspectSource(this); |
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}, 'toString');
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