--- /dev/null
+'use strict';
+var DESCRIPTORS = require('../internals/descriptors');
+var global = require('../internals/global');
+var isForced = require('../internals/is-forced');
+var redefine = require('../internals/redefine');
+var has = require('../internals/has');
+var classof = require('../internals/classof-raw');
+var inheritIfRequired = require('../internals/inherit-if-required');
+var toPrimitive = require('../internals/to-primitive');
+var fails = require('../internals/fails');
+var create = require('../internals/object-create');
+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 trim = require('../internals/string-trim').trim;
+
+var NUMBER = 'Number';
+var NativeNumber = global[NUMBER];
+var NumberPrototype = NativeNumber.prototype;
+
+// Opera ~12 has broken Object#toString
+var BROKEN_CLASSOF = classof(create(NumberPrototype)) == NUMBER;
+
+// `ToNumber` abstract operation
+// https://tc39.es/ecma262/#sec-tonumber
+var toNumber = function (argument) {
+ var it = toPrimitive(argument, false);
+ var first, third, radix, maxCode, digits, length, index, code;
+ if (typeof it == 'string' && it.length > 2) {
+ it = trim(it);
+ first = it.charCodeAt(0);
+ 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 of /^0b[01]+$/i
+ case 79: case 111: radix = 8; maxCode = 55; break; // fast equal of /^0o[0-7]+$/i
+ default: return +it;
+ }
+ digits = it.slice(2);
+ length = digits.length;
+ for (index = 0; index < length; index++) {
+ code = digits.charCodeAt(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;
+};
+
+// `Number` constructor
+// https://tc39.es/ecma262/#sec-number-constructor
+if (isForced(NUMBER, !NativeNumber(' 0o1') || !NativeNumber('0b1') || NativeNumber('+0x1'))) {
+ var NumberWrapper = function Number(value) {
+ var it = arguments.length < 1 ? 0 : value;
+ var dummy = this;
+ return dummy instanceof NumberWrapper
+ // check on 1..constructor(foo) case
+ && (BROKEN_CLASSOF ? fails(function () { NumberPrototype.valueOf.call(dummy); }) : classof(dummy) != NUMBER)
+ ? inheritIfRequired(new NativeNumber(toNumber(it)), dummy, NumberWrapper) : toNumber(it);
+ };
+ for (var keys = DESCRIPTORS ? getOwnPropertyNames(NativeNumber) : (
+ // ES3:
+ 'MAX_VALUE,MIN_VALUE,NaN,NEGATIVE_INFINITY,POSITIVE_INFINITY,' +
+ // ES2015 (in case, if modules with ES2015 Number statics required before):
+ 'EPSILON,isFinite,isInteger,isNaN,isSafeInteger,MAX_SAFE_INTEGER,' +
+ 'MIN_SAFE_INTEGER,parseFloat,parseInt,isInteger,' +
+ // ESNext
+ 'fromString,range'
+ ).split(','), j = 0, key; keys.length > j; j++) {
+ if (has(NativeNumber, key = keys[j]) && !has(NumberWrapper, key)) {
+ defineProperty(NumberWrapper, key, getOwnPropertyDescriptor(NativeNumber, key));
+ }
+ }
+ NumberWrapper.prototype = NumberPrototype;
+ NumberPrototype.constructor = NumberWrapper;
+ redefine(global, NUMBER, NumberWrapper);
+}