'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; | |
}; |