Sha256: 11d2e946bedeb4880c5eb8c0bd02315a5ba921d6ed4099ce54bccba8dc147400
Contents?: true
Size: 1.6 KB
Versions: 10
Compression:
Stored size: 1.6 KB
Contents
/**
* The MIT License (MIT)
* Copyright (c) 2017-present Dmitry Soshnikov <dmitry.soshnikov@gmail.com>
*/
'use strict';
/**
* A regexp-tree plugin to remove unnecessary groups.
*
* /(?:a)/ -> /a/
*/
function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } else { return Array.from(arr); } }
module.exports = {
Group: function Group(path) {
var node = path.node,
parent = path.parent;
var childPath = path.getChild();
if (node.capturing || !childPath) {
return;
}
// Don't optimize /a(?:b|c)/ to /ab|c/
// but /(?:b|c)/ to /b|c/ is ok
if (childPath.node.type === 'Disjunction' && parent.type !== 'RegExp') {
return;
}
// Don't optimize /(?:ab)+/ to /ab+/
// but /(?:a)+/ to /a+/ is ok
// and /(?:[a-d])+/ to /[a-d]+/ is ok too
if (parent.type === 'Repetition' && childPath.node.type !== 'Char' && childPath.node.type !== 'CharacterClass') {
return;
}
if (childPath.node.type === 'Alternative') {
var parentPath = path.getParent();
if (parentPath.node.type === 'Alternative') {
// /abc(?:def)ghi/ When (?:def) is ungrouped its content must be merged with parent alternative
parentPath.replace({
type: 'Alternative',
expressions: [].concat(_toConsumableArray(parent.expressions.slice(0, path.index)), _toConsumableArray(childPath.node.expressions), _toConsumableArray(parent.expressions.slice(path.index + 1)))
});
}
} else {
path.replace(childPath.node);
}
}
};
Version data entries
10 entries across 10 versions & 3 rubygems