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| author | ruki <waruqi@gmail.com> | 2018-11-08 00:38:48 +0800 |
|---|---|---|
| committer | ruki <waruqi@gmail.com> | 2018-11-07 21:53:09 +0800 |
| commit | 26105034da4fcce7ac883c899d781f016559310d (patch) | |
| tree | c459a5dc4e3aa0972d9919033ece511ce76dd129 /node_modules/core-js/modules/es6.number.constructor.js | |
| parent | 2c77f00f1a7ecb6c8192f9c16d3b2001b254a107 (diff) | |
| download | xmake-docs-26105034da4fcce7ac883c899d781f016559310d.tar.gz xmake-docs-26105034da4fcce7ac883c899d781f016559310d.zip | |
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Diffstat (limited to 'node_modules/core-js/modules/es6.number.constructor.js')
| -rw-r--r-- | node_modules/core-js/modules/es6.number.constructor.js | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/node_modules/core-js/modules/es6.number.constructor.js b/node_modules/core-js/modules/es6.number.constructor.js new file mode 100644 index 00000000..aee40e9a --- /dev/null +++ b/node_modules/core-js/modules/es6.number.constructor.js @@ -0,0 +1,69 @@ +'use strict'; +var global = require('./_global'); +var has = require('./_has'); +var cof = require('./_cof'); +var inheritIfRequired = require('./_inherit-if-required'); +var toPrimitive = require('./_to-primitive'); +var fails = require('./_fails'); +var gOPN = require('./_object-gopn').f; +var gOPD = require('./_object-gopd').f; +var dP = require('./_object-dp').f; +var $trim = require('./_string-trim').trim; +var NUMBER = 'Number'; +var $Number = global[NUMBER]; +var Base = $Number; +var proto = $Number.prototype; +// Opera ~12 has broken Object#toString +var BROKEN_COF = cof(require('./_object-create')(proto)) == NUMBER; +var TRIM = 'trim' in String.prototype; + +// 7.1.3 ToNumber(argument) +var toNumber = function (argument) { + var it = toPrimitive(argument, false); + if (typeof it == 'string' && it.length > 2) { + it = TRIM ? it.trim() : $trim(it, 3); + var first = it.charCodeAt(0); + var third, radix, maxCode; + if (first === 43 || first === 45) { + third = it.charCodeAt(2); + if (third === 88 || third === 120) return NaN; // Number('+0x1') should be NaN, old V8 fix + } else if (first === 48) { + switch (it.charCodeAt(1)) { + case 66: case 98: radix = 2; maxCode = 49; break; // fast equal /^0b[01]+$/i + case 79: case 111: radix = 8; maxCode = 55; break; // fast equal /^0o[0-7]+$/i + default: return +it; + } + for (var digits = it.slice(2), i = 0, l = digits.length, code; i < l; i++) { + code = digits.charCodeAt(i); + // parseInt parses a string to a first unavailable symbol + // but ToNumber should return NaN if a string contains unavailable symbols + if (code < 48 || code > maxCode) return NaN; + } return parseInt(digits, radix); + } + } return +it; +}; + +if (!$Number(' 0o1') || !$Number('0b1') || $Number('+0x1')) { + $Number = function Number(value) { + var it = arguments.length < 1 ? 0 : value; + var that = this; + return that instanceof $Number + // check on 1..constructor(foo) case + && (BROKEN_COF ? fails(function () { proto.valueOf.call(that); }) : cof(that) != NUMBER) + ? inheritIfRequired(new Base(toNumber(it)), that, $Number) : toNumber(it); + }; + for (var keys = require('./_descriptors') ? gOPN(Base) : ( + // ES3: + 'MAX_VALUE,MIN_VALUE,NaN,NEGATIVE_INFINITY,POSITIVE_INFINITY,' + + // ES6 (in case, if modules with ES6 Number statics required before): + 'EPSILON,isFinite,isInteger,isNaN,isSafeInteger,MAX_SAFE_INTEGER,' + + 'MIN_SAFE_INTEGER,parseFloat,parseInt,isInteger' + ).split(','), j = 0, key; keys.length > j; j++) { + if (has(Base, key = keys[j]) && !has($Number, key)) { + dP($Number, key, gOPD(Base, key)); + } + } + $Number.prototype = proto; + proto.constructor = $Number; + require('./_redefine')(global, NUMBER, $Number); +} |
