You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
44 lines
960 B
44 lines
960 B
'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-add |
|
|
|
module.exports = function NumberAdd(x, y) { |
|
if (Type(x) !== 'Number' || Type(y) !== 'Number') { |
|
throw new $TypeError('Assertion failed: `x` and `y` arguments must be Numbers'); |
|
} |
|
|
|
if (isNaN(x) || isNaN(y) || (x === Infinity && y === -Infinity) || (x === -Infinity && y === Infinity)) { |
|
return NaN; |
|
} |
|
|
|
if ((x === Infinity && y === Infinity) || (x === -Infinity && y === -Infinity)) { |
|
return x; |
|
} |
|
|
|
if (x === Infinity) { |
|
return x; |
|
} |
|
|
|
if (y === Infinity) { |
|
return y; |
|
} |
|
|
|
if (x === y && x === 0) { |
|
return Infinity / x === -Infinity && Infinity / y === -Infinity ? -0 : +0; |
|
} |
|
|
|
if (x === -y || -x === y) { |
|
return +0; |
|
} |
|
|
|
// shortcut for the actual spec mechanics |
|
return x + y; |
|
};
|
|
|