| 'use strict'; | |
| var GetIntrinsic = require('get-intrinsic'); | |
| var $TypeError = GetIntrinsic('%TypeError%'); | |
| var isNaN = require('../../helpers/isNaN'); | |
| var Type = require('../Type'); | |
| // https://262.ecma-international.org/11.0/#sec-numeric-types-number-unaryMinus | |
| module.exports = function NumberUnaryMinus(x) { | |
| if (Type(x) !== 'Number') { | |
| throw new $TypeError('Assertion failed: `x` argument must be a Number'); | |
| } | |
| if (isNaN(x)) { | |
| return NaN; | |
| } | |
| return -x; | |
| }; |