| 1 | var utils = require('../utils')
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| 2 | , nodes = require('../nodes');
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| 3 |
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| 4 | /**
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| 5 | * Lookup variable `name` or return Null.
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| 6 | *
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| 7 | * @param {String} name
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| 8 | * @return {Mixed}
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| 9 | * @api public
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| 10 | */
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| 11 |
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| 12 | function lookup(name){
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| 13 | utils.assertType(name, 'string', 'name');
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| 14 | var node = this.lookup(name.val);
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| 15 | if (!node) return nodes.null;
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| 16 | return this.visit(node);
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| 17 | }
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| 18 | lookup.params = ['name'];
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| 19 | module.exports = lookup;
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