1 files changed, 59 insertions, 0 deletions
diff --git a/node_modules/es-abstract/2015/ToNumber.js b/node_modules/es-abstract/2015/ToNumber.js
new file mode 100644
index 000000000..7a3cdc89e
--- /dev/null
+++ b/node_modules/es-abstract/2015/ToNumber.js
@@ -0,0 +1,59 @@
+'use strict';
+
+var GetIntrinsic = require('../GetIntrinsic');
+
+var $TypeError = GetIntrinsic('%TypeError%');
+var $Number = GetIntrinsic('%Number%');
+var $RegExp = GetIntrinsic('%RegExp%');
+var $parseInteger = GetIntrinsic('%parseInt%');
+
+var callBound = require('../helpers/callBound');
+var regexTester = require('../helpers/regexTester');
+var isPrimitive = require('../helpers/isPrimitive');
+
+var $strSlice = callBound('String.prototype.slice');
+var isBinary = regexTester(/^0b[01]+$/i);
+var isOctal = regexTester(/^0o[0-7]+$/i);
+var isInvalidHexLiteral = regexTester(/^[-+]0x[0-9a-f]+$/i);
+var nonWS = ['\u0085', '\u200b', '\ufffe'].join('');
+var nonWSregex = new $RegExp('[' + nonWS + ']', 'g');
+var hasNonWS = regexTester(nonWSregex);
+
+// whitespace from: https://es5.github.io/#x15.5.4.20
+// implementation from https://github.com/es-shims/es5-shim/blob/v3.4.0/es5-shim.js#L1304-L1324
+var ws = [
+	'\x09\x0A\x0B\x0C\x0D\x20\xA0\u1680\u180E\u2000\u2001\u2002\u2003',
+	'\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\u2028',
+	'\u2029\uFEFF'
+].join('');
+var trimRegex = new RegExp('(^[' + ws + ']+)|([' + ws + ']+$)', 'g');
+var $replace = callBound('String.prototype.replace');
+var $trim = function (value) {
+	return $replace(value, trimRegex, '');
+};
+
+var ToPrimitive = require('./ToPrimitive');
+
+// https://www.ecma-international.org/ecma-262/6.0/#sec-tonumber
+
+module.exports = function ToNumber(argument) {
+	var value = isPrimitive(argument) ? argument : ToPrimitive(argument, $Number);
+	if (typeof value === 'symbol') {
+		throw new $TypeError('Cannot convert a Symbol value to a number');
+	}
+	if (typeof value === 'string') {
+		if (isBinary(value)) {
+			return ToNumber($parseInteger($strSlice(value, 2), 2));
+		} else if (isOctal(value)) {
+			return ToNumber($parseInteger($strSlice(value, 2), 8));
+		} else if (hasNonWS(value) || isInvalidHexLiteral(value)) {
+			return NaN;
+		} else {
+			var trimmed = $trim(value);
+			if (trimmed !== value) {
+				return ToNumber(trimmed);
+			}
+		}
+	}
+	return $Number(value);
+};