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Last change
on this file was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
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initial commit
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File size:
607 bytes
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| 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 | * Returns substring of the given `val`.
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| 6 | *
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| 7 | * @param {String|Ident} val
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| 8 | * @param {Number} start
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| 9 | * @param {Number} [length]
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| 10 | * @return {String|Ident}
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| 11 | * @api public
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| 12 | */
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| 13 |
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| 14 | function substr(val, start, length){
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| 15 | utils.assertString(val, 'val');
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| 16 | utils.assertType(start, 'unit', 'start');
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| 17 | length = length && length.val;
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| 18 | var res = val.string.substr(start.val, length);
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| 19 | return val instanceof nodes.Ident
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| 20 | ? new nodes.Ident(res)
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| 21 | : new nodes.String(res);
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| 22 | }
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| 23 | substr.params = ['val', 'start', 'length'];
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| 24 | module.exports = substr;
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