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