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