| 'use strict'; |
| |
| var Type = require('../type'); |
| |
| function resolveYamlNull(data) { |
| if (data === null) return true; |
| |
| var max = data.length; |
| |
| return (max === 1 && data === '~') || |
| (max === 4 && (data === 'null' || data === 'Null' || data === 'NULL')); |
| } |
| |
| function constructYamlNull() { |
| return null; |
| } |
| |
| function isNull(object) { |
| return object === null; |
| } |
| |
| module.exports = new Type('tag:yaml.org,2002:null', { |
| kind: 'scalar', |
| resolve: resolveYamlNull, |
| construct: constructYamlNull, |
| predicate: isNull, |
| represent: { |
| canonical: function () { return '~'; }, |
| lowercase: function () { return 'null'; }, |
| uppercase: function () { return 'NULL'; }, |
| camelcase: function () { return 'Null'; } |
| }, |
| defaultStyle: 'lowercase' |
| }); |