2 var global = require('./_global')
3 , has = require('./_has')
4 , cof = require('./_cof')
5 , inheritIfRequired = require('./_inherit-if-required')
6 , toPrimitive = require('./_to-primitive')
7 , fails = require('./_fails')
8 , gOPN = require('./_object-gopn').f
9 , gOPD = require('./_object-gopd').f
10 , dP = require('./_object-dp').f
11 , $trim = require('./_string-trim').trim
13 , $Number = global[NUMBER]
15 , proto = $Number.prototype
16 // Opera ~12 has broken Object#toString
17 , BROKEN_COF = cof(require('./_object-create')(proto)) == NUMBER
18 , TRIM = 'trim' in String.prototype;
20 // 7.1.3 ToNumber(argument)
21 var toNumber = function(argument){
22 var it = toPrimitive(argument, false);
23 if(typeof it == 'string' && it.length > 2){
24 it = TRIM ? it.trim() : $trim(it, 3);
25 var first = it.charCodeAt(0)
26 , third, radix, maxCode;
27 if(first === 43 || first === 45){
28 third = it.charCodeAt(2);
29 if(third === 88 || third === 120)return NaN; // Number('+0x1') should be NaN, old V8 fix
30 } else if(first === 48){
31 switch(it.charCodeAt(1)){
32 case 66 : case 98 : radix = 2; maxCode = 49; break; // fast equal /^0b[01]+$/i
33 case 79 : case 111 : radix = 8; maxCode = 55; break; // fast equal /^0o[0-7]+$/i
36 for(var digits = it.slice(2), i = 0, l = digits.length, code; i < l; i++){
37 code = digits.charCodeAt(i);
38 // parseInt parses a string to a first unavailable symbol
39 // but ToNumber should return NaN if a string contains unavailable symbols
40 if(code < 48 || code > maxCode)return NaN;
41 } return parseInt(digits, radix);
46 if(!$Number(' 0o1') || !$Number('0b1') || $Number('+0x1')){
47 $Number = function Number(value){
48 var it = arguments.length < 1 ? 0 : value
50 return that instanceof $Number
51 // check on 1..constructor(foo) case
52 && (BROKEN_COF ? fails(function(){ proto.valueOf.call(that); }) : cof(that) != NUMBER)
53 ? inheritIfRequired(new Base(toNumber(it)), that, $Number) : toNumber(it);
55 for(var keys = require('./_descriptors') ? gOPN(Base) : (
57 'MAX_VALUE,MIN_VALUE,NaN,NEGATIVE_INFINITY,POSITIVE_INFINITY,' +
58 // ES6 (in case, if modules with ES6 Number statics required before):
59 'EPSILON,isFinite,isInteger,isNaN,isSafeInteger,MAX_SAFE_INTEGER,' +
60 'MIN_SAFE_INTEGER,parseFloat,parseInt,isInteger'
61 ).split(','), j = 0, key; keys.length > j; j++){
62 if(has(Base, key = keys[j]) && !has($Number, key)){
63 dP($Number, key, gOPD(Base, key));
66 $Number.prototype = proto;
67 proto.constructor = $Number;
68 require('./_redefine')(global, NUMBER, $Number);