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18 lines
469 B
JavaScript

'use strict';
var Scalar = require('../../nodes/Scalar.js');
const nullTag = {
identify: value => value == null,
createNode: () => new Scalar.Scalar(null),
default: true,
tag: 'tag:yaml.org,2002:null',
test: /^(?:~|[Nn]ull|NULL)?$/,
resolve: () => new Scalar.Scalar(null),
stringify: ({ source }, ctx) => typeof source === 'string' && nullTag.test.test(source)
? source
: ctx.options.nullStr
};
exports.nullTag = nullTag;