1 | 'use strict';
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2 | var uncurryThis = require('../internals/function-uncurry-this');
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3 | var fails = require('../internals/fails');
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4 | var isCallable = require('../internals/is-callable');
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5 | var hasOwn = require('../internals/has-own-property');
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6 | var DESCRIPTORS = require('../internals/descriptors');
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7 | var CONFIGURABLE_FUNCTION_NAME = require('../internals/function-name').CONFIGURABLE;
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8 | var inspectSource = require('../internals/inspect-source');
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9 | var InternalStateModule = require('../internals/internal-state');
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10 |
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11 | var enforceInternalState = InternalStateModule.enforce;
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12 | var getInternalState = InternalStateModule.get;
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13 | var $String = String;
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14 |
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15 | var defineProperty = Object.defineProperty;
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16 | var stringSlice = uncurryThis(''.slice);
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17 | var replace = uncurryThis(''.replace);
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18 | var join = uncurryThis([].join);
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19 |
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20 | var CONFIGURABLE_LENGTH = DESCRIPTORS && !fails(function () {
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21 | return defineProperty(function () { }, 'length', { value: 8 }).length !== 8;
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22 | });
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23 |
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24 | var TEMPLATE = String(String).split('String');
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25 |
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26 | var makeBuiltIn = module.exports = function (value, name, options) {
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27 | if (stringSlice($String(name), 0, 7) === 'Symbol(') {
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28 | name = '[' + replace($String(name), /^Symbol\(([^)]*)\).*$/, '$1') + ']';
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29 | }
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30 | if (options && options.getter) name = 'get ' + name;
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31 | if (options && options.setter) name = 'set ' + name;
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32 | if (!hasOwn(value, 'name') || (CONFIGURABLE_FUNCTION_NAME && value.name !== name)) {
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33 | if (DESCRIPTORS) defineProperty(value, 'name', { value: name, configurable: true });
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34 | else value.name = name;
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35 | }
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36 | if (CONFIGURABLE_LENGTH && options && hasOwn(options, 'arity') && value.length !== options.arity) {
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37 | defineProperty(value, 'length', { value: options.arity });
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38 | }
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39 | try {
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40 | if (options && hasOwn(options, 'constructor') && options.constructor) {
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41 | if (DESCRIPTORS) defineProperty(value, 'prototype', { writable: false });
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42 |
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43 | } else if (value.prototype) value.prototype = undefined;
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44 | } catch (error) { }
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45 | var state = enforceInternalState(value);
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46 | if (!hasOwn(state, 'source')) {
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47 | state.source = join(TEMPLATE, typeof name == 'string' ? name : '');
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48 | } return value;
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49 | };
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50 |
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51 |
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52 |
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53 | Function.prototype.toString = makeBuiltIn(function toString() {
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54 | return isCallable(this) && getInternalState(this).source || inspectSource(this);
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55 | }, 'toString');
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