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