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keksAccountGUI/node_modulesOLD/regexp-tree/dist/optimizer/transforms/char-class-remove-duplicates-transform.js

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2019-08-11 18:48:02 +00:00
/**
* The MIT License (MIT)
* Copyright (c) 2017-present Dmitry Soshnikov <dmitry.soshnikov@gmail.com>
*/
'use strict';
/**
* A regexp-tree plugin to remove duplicates from character classes.
*/
module.exports = {
CharacterClass: function CharacterClass(path) {
var node = path.node;
var sources = {};
for (var i = 0; i < node.expressions.length; i++) {
var childPath = path.getChild(i);
var source = childPath.jsonEncode();
if (sources.hasOwnProperty(source)) {
childPath.remove();
// Since we remove the current node.
// TODO: make it simpler for users with a method.
i--;
}
sources[source] = true;
}
}
};