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30 lines
604 B
JavaScript
30 lines
604 B
JavaScript
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/**
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* The MIT License (MIT)
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* Copyright (c) 2017-present Dmitry Soshnikov <dmitry.soshnikov@gmail.com>
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*/
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'use strict';
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/**
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* A regexp-tree plugin to simplify character classes
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* spanning only one or two chars.
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*
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* [a-a] -> [a]
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* [a-b] -> [ab]
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*/
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module.exports = {
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ClassRange: function ClassRange(path) {
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var node = path.node;
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if (node.from.codePoint === node.to.codePoint) {
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path.replace(node.from);
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} else if (node.from.codePoint === node.to.codePoint - 1) {
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path.getParent().insertChildAt(node.to, path.index + 1);
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path.replace(node.from);
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}
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}
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};
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