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56 lines
1.8 KiB
56 lines
1.8 KiB
'use strict'; |
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var GetIntrinsic = require('get-intrinsic'); |
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var $Number = GetIntrinsic('%Number%'); |
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var $RegExp = GetIntrinsic('%RegExp%'); |
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var $TypeError = GetIntrinsic('%TypeError%'); |
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var $parseInteger = GetIntrinsic('%parseInt%'); |
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var callBound = require('call-bind/callBound'); |
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var regexTester = require('../helpers/regexTester'); |
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var $strSlice = callBound('String.prototype.slice'); |
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var isBinary = regexTester(/^0b[01]+$/i); |
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var isOctal = regexTester(/^0o[0-7]+$/i); |
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var isInvalidHexLiteral = regexTester(/^[-+]0x[0-9a-f]+$/i); |
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var nonWS = ['\u0085', '\u200b', '\ufffe'].join(''); |
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var nonWSregex = new $RegExp('[' + nonWS + ']', 'g'); |
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var hasNonWS = regexTester(nonWSregex); |
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// whitespace from: https://es5.github.io/#x15.5.4.20 |
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// implementation from https://github.com/es-shims/es5-shim/blob/v3.4.0/es5-shim.js#L1304-L1324 |
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var ws = [ |
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'\x09\x0A\x0B\x0C\x0D\x20\xA0\u1680\u180E\u2000\u2001\u2002\u2003', |
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'\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\u2028', |
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'\u2029\uFEFF' |
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].join(''); |
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var trimRegex = new RegExp('(^[' + ws + ']+)|([' + ws + ']+$)', 'g'); |
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var $replace = callBound('String.prototype.replace'); |
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var $trim = function (value) { |
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return $replace(value, trimRegex, ''); |
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}; |
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var Type = require('./Type'); |
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// https://ecma-international.org/ecma-262/13.0/#sec-stringtonumber |
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module.exports = function StringToNumber(argument) { |
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if (Type(argument) !== 'String') { |
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throw new $TypeError('Conversion from \'BigInt\' to \'number\' is not allowed.'); |
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} |
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if (isBinary(argument)) { |
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return $Number($parseInteger($strSlice(argument, 2), 2)); |
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} |
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if (isOctal(argument)) { |
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return $Number($parseInteger($strSlice(argument, 2), 8)); |
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} |
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if (hasNonWS(argument) || isInvalidHexLiteral(argument)) { |
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return NaN; |
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} |
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var trimmed = $trim(argument); |
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if (trimmed !== argument) { |
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return StringToNumber(trimmed); |
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} |
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return $Number(argument); |
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};
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