56 lines
2.5 KiB
JavaScript
56 lines
2.5 KiB
JavaScript
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'use strict';
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var uncurryThis = require('../internals/function-uncurry-this');
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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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var $String = String;
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// eslint-disable-next-line es/no-object-defineproperty -- safe
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var defineProperty = Object.defineProperty;
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var stringSlice = uncurryThis(''.slice);
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var replace = uncurryThis(''.replace);
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var join = uncurryThis([].join);
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var CONFIGURABLE_LENGTH = DESCRIPTORS && !fails(function () {
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return defineProperty(function () { /* empty */ }, 'length', { value: 8 }).length !== 8;
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});
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var TEMPLATE = String(String).split('String');
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var makeBuiltIn = module.exports = function (value, name, options) {
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if (stringSlice($String(name), 0, 7) === 'Symbol(') {
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name = '[' + replace($String(name), /^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 = join(TEMPLATE, 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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