69 lines
1.3 KiB
JavaScript
69 lines
1.3 KiB
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 translate `/./s` to `/[\0-\uFFFF]/`.
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*/
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module.exports = {
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// Whether `u` flag present. In which case we transform to
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// \u{10FFFF} instead of \uFFFF.
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_hasUFlag: false,
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// Only run this plugin if we have `s` flag.
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shouldRun: function shouldRun(ast) {
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var shouldRun = ast.flags.includes('s');
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if (!shouldRun) {
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return false;
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}
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// Strip the `s` flag.
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ast.flags = ast.flags.replace('s', '');
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// Whether we have also `u`.
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this._hasUFlag = ast.flags.includes('u');
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return true;
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},
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Char: function Char(path) {
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var node = path.node;
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if (node.kind !== 'meta' || node.value !== '.') {
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return;
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}
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var toValue = '\\uFFFF';
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var toSymbol = '\uFFFF';
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if (this._hasUFlag) {
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toValue = '\\u{10FFFF}';
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toSymbol = '\uDBFF\uDFFF';
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}
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path.replace({
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type: 'CharacterClass',
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expressions: [{
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type: 'ClassRange',
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from: {
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type: 'Char',
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value: '\\0',
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kind: 'decimal',
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symbol: '\0'
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},
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to: {
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type: 'Char',
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value: toValue,
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kind: 'unicode',
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symbol: toSymbol
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}
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}]
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});
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}
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};
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