[6a3a178] | 1 | 'use strict';
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| 2 | var DESCRIPTORS = require('../internals/descriptors');
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| 3 | var global = require('../internals/global');
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| 4 | var isForced = require('../internals/is-forced');
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| 5 | var redefine = require('../internals/redefine');
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| 6 | var has = require('../internals/has');
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| 7 | var classof = require('../internals/classof-raw');
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| 8 | var inheritIfRequired = require('../internals/inherit-if-required');
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| 9 | var isSymbol = require('../internals/is-symbol');
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| 10 | var toPrimitive = require('../internals/to-primitive');
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| 11 | var fails = require('../internals/fails');
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| 12 | var create = require('../internals/object-create');
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| 13 | var getOwnPropertyNames = require('../internals/object-get-own-property-names').f;
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| 14 | var getOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f;
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| 15 | var defineProperty = require('../internals/object-define-property').f;
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| 16 | var trim = require('../internals/string-trim').trim;
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| 17 |
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| 18 | var NUMBER = 'Number';
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| 19 | var NativeNumber = global[NUMBER];
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| 20 | var NumberPrototype = NativeNumber.prototype;
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| 21 |
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| 22 | // Opera ~12 has broken Object#toString
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| 23 | var BROKEN_CLASSOF = classof(create(NumberPrototype)) == NUMBER;
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| 24 |
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| 25 | // `ToNumber` abstract operation
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| 26 | // https://tc39.es/ecma262/#sec-tonumber
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| 27 | var toNumber = function (argument) {
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| 28 | if (isSymbol(argument)) throw TypeError('Cannot convert a Symbol value to a number');
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| 29 | var it = toPrimitive(argument, 'number');
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| 30 | var first, third, radix, maxCode, digits, length, index, code;
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| 31 | if (typeof it == 'string' && it.length > 2) {
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| 32 | it = trim(it);
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| 33 | first = it.charCodeAt(0);
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| 34 | if (first === 43 || first === 45) {
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| 35 | third = it.charCodeAt(2);
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| 36 | if (third === 88 || third === 120) return NaN; // Number('+0x1') should be NaN, old V8 fix
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| 37 | } else if (first === 48) {
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| 38 | switch (it.charCodeAt(1)) {
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| 39 | case 66: case 98: radix = 2; maxCode = 49; break; // fast equal of /^0b[01]+$/i
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| 40 | case 79: case 111: radix = 8; maxCode = 55; break; // fast equal of /^0o[0-7]+$/i
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| 41 | default: return +it;
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| 42 | }
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| 43 | digits = it.slice(2);
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| 44 | length = digits.length;
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| 45 | for (index = 0; index < length; index++) {
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| 46 | code = digits.charCodeAt(index);
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| 47 | // parseInt parses a string to a first unavailable symbol
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| 48 | // but ToNumber should return NaN if a string contains unavailable symbols
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| 49 | if (code < 48 || code > maxCode) return NaN;
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| 50 | } return parseInt(digits, radix);
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| 51 | }
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| 52 | } return +it;
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| 53 | };
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| 54 |
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| 55 | // `Number` constructor
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| 56 | // https://tc39.es/ecma262/#sec-number-constructor
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| 57 | if (isForced(NUMBER, !NativeNumber(' 0o1') || !NativeNumber('0b1') || NativeNumber('+0x1'))) {
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| 58 | var NumberWrapper = function Number(value) {
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| 59 | var it = arguments.length < 1 ? 0 : value;
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| 60 | var dummy = this;
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| 61 | return dummy instanceof NumberWrapper
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| 62 | // check on 1..constructor(foo) case
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| 63 | && (BROKEN_CLASSOF ? fails(function () { NumberPrototype.valueOf.call(dummy); }) : classof(dummy) != NUMBER)
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| 64 | ? inheritIfRequired(new NativeNumber(toNumber(it)), dummy, NumberWrapper) : toNumber(it);
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| 65 | };
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| 66 | for (var keys = DESCRIPTORS ? getOwnPropertyNames(NativeNumber) : (
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| 67 | // ES3:
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| 68 | 'MAX_VALUE,MIN_VALUE,NaN,NEGATIVE_INFINITY,POSITIVE_INFINITY,' +
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| 69 | // ES2015 (in case, if modules with ES2015 Number statics required before):
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| 70 | 'EPSILON,isFinite,isInteger,isNaN,isSafeInteger,MAX_SAFE_INTEGER,' +
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| 71 | 'MIN_SAFE_INTEGER,parseFloat,parseInt,isInteger,' +
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| 72 | // ESNext
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| 73 | 'fromString,range'
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| 74 | ).split(','), j = 0, key; keys.length > j; j++) {
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| 75 | if (has(NativeNumber, key = keys[j]) && !has(NumberWrapper, key)) {
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| 76 | defineProperty(NumberWrapper, key, getOwnPropertyDescriptor(NativeNumber, key));
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| 77 | }
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| 78 | }
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| 79 | NumberWrapper.prototype = NumberPrototype;
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| 80 | NumberPrototype.constructor = NumberWrapper;
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| 81 | redefine(global, NUMBER, NumberWrapper);
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| 82 | }
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