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							115 lines
						
					
					
						
							4.5 KiB
						
					
					
				| 'use strict'; | |
| var $ = require('../internals/export'); | |
| var IS_PURE = require('../internals/is-pure'); | |
| var DESCRIPTORS = require('../internals/descriptors'); | |
| var global = require('../internals/global'); | |
| var path = require('../internals/path'); | |
| var uncurryThis = require('../internals/function-uncurry-this'); | |
| var isForced = require('../internals/is-forced'); | |
| var hasOwn = require('../internals/has-own-property'); | |
| var inheritIfRequired = require('../internals/inherit-if-required'); | |
| var isPrototypeOf = require('../internals/object-is-prototype-of'); | |
| var isSymbol = require('../internals/is-symbol'); | |
| var toPrimitive = require('../internals/to-primitive'); | |
| var fails = require('../internals/fails'); | |
| var getOwnPropertyNames = require('../internals/object-get-own-property-names').f; | |
| var getOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f; | |
| var defineProperty = require('../internals/object-define-property').f; | |
| var thisNumberValue = require('../internals/this-number-value'); | |
| var trim = require('../internals/string-trim').trim; | |
| 
 | |
| var NUMBER = 'Number'; | |
| var NativeNumber = global[NUMBER]; | |
| var PureNumberNamespace = path[NUMBER]; | |
| var NumberPrototype = NativeNumber.prototype; | |
| var TypeError = global.TypeError; | |
| var stringSlice = uncurryThis(''.slice); | |
| var charCodeAt = uncurryThis(''.charCodeAt); | |
| 
 | |
| // `ToNumeric` abstract operation | |
| // https://tc39.es/ecma262/#sec-tonumeric | |
| var toNumeric = function (value) { | |
|   var primValue = toPrimitive(value, 'number'); | |
|   return typeof primValue == 'bigint' ? primValue : toNumber(primValue); | |
| }; | |
| 
 | |
| // `ToNumber` abstract operation | |
| // https://tc39.es/ecma262/#sec-tonumber | |
| var toNumber = function (argument) { | |
|   var it = toPrimitive(argument, 'number'); | |
|   var first, third, radix, maxCode, digits, length, index, code; | |
|   if (isSymbol(it)) throw new TypeError('Cannot convert a Symbol value to a number'); | |
|   if (typeof it == 'string' && it.length > 2) { | |
|     it = trim(it); | |
|     first = charCodeAt(it, 0); | |
|     if (first === 43 || first === 45) { | |
|       third = charCodeAt(it, 2); | |
|       if (third === 88 || third === 120) return NaN; // Number('+0x1') should be NaN, old V8 fix | |
|     } else if (first === 48) { | |
|       switch (charCodeAt(it, 1)) { | |
|         // fast equal of /^0b[01]+$/i | |
|         case 66: | |
|         case 98: | |
|           radix = 2; | |
|           maxCode = 49; | |
|           break; | |
|         // fast equal of /^0o[0-7]+$/i | |
|         case 79: | |
|         case 111: | |
|           radix = 8; | |
|           maxCode = 55; | |
|           break; | |
|         default: | |
|           return +it; | |
|       } | |
|       digits = stringSlice(it, 2); | |
|       length = digits.length; | |
|       for (index = 0; index < length; index++) { | |
|         code = charCodeAt(digits, index); | |
|         // parseInt parses a string to a first unavailable symbol | |
|         // but ToNumber should return NaN if a string contains unavailable symbols | |
|         if (code < 48 || code > maxCode) return NaN; | |
|       } return parseInt(digits, radix); | |
|     } | |
|   } return +it; | |
| }; | |
| 
 | |
| var FORCED = isForced(NUMBER, !NativeNumber(' 0o1') || !NativeNumber('0b1') || NativeNumber('+0x1')); | |
| 
 | |
| var calledWithNew = function (dummy) { | |
|   // includes check on 1..constructor(foo) case | |
|   return isPrototypeOf(NumberPrototype, dummy) && fails(function () { thisNumberValue(dummy); }); | |
| }; | |
| 
 | |
| // `Number` constructor | |
| // https://tc39.es/ecma262/#sec-number-constructor | |
| var NumberWrapper = function Number(value) { | |
|   var n = arguments.length < 1 ? 0 : NativeNumber(toNumeric(value)); | |
|   return calledWithNew(this) ? inheritIfRequired(Object(n), this, NumberWrapper) : n; | |
| }; | |
| 
 | |
| NumberWrapper.prototype = NumberPrototype; | |
| if (FORCED && !IS_PURE) NumberPrototype.constructor = NumberWrapper; | |
| 
 | |
| $({ global: true, constructor: true, wrap: true, forced: FORCED }, { | |
|   Number: NumberWrapper | |
| }); | |
| 
 | |
| // Use `internal/copy-constructor-properties` helper in `core-js@4` | |
| var copyConstructorProperties = function (target, source) { | |
|   for (var keys = DESCRIPTORS ? getOwnPropertyNames(source) : ( | |
|     // ES3: | |
|     'MAX_VALUE,MIN_VALUE,NaN,NEGATIVE_INFINITY,POSITIVE_INFINITY,' + | |
|     // ES2015 (in case, if modules with ES2015 Number statics required before): | |
|     'EPSILON,MAX_SAFE_INTEGER,MIN_SAFE_INTEGER,isFinite,isInteger,isNaN,isSafeInteger,parseFloat,parseInt,' + | |
|     // ESNext | |
|     'fromString,range' | |
|   ).split(','), j = 0, key; keys.length > j; j++) { | |
|     if (hasOwn(source, key = keys[j]) && !hasOwn(target, key)) { | |
|       defineProperty(target, key, getOwnPropertyDescriptor(source, key)); | |
|     } | |
|   } | |
| }; | |
| 
 | |
| if (IS_PURE && PureNumberNamespace) copyConstructorProperties(path[NUMBER], PureNumberNamespace); | |
| if (FORCED || IS_PURE) copyConstructorProperties(path[NUMBER], NativeNumber);
 |