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55 lines
1.3 KiB
55 lines
1.3 KiB
4 years ago
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"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.generateRegexpuOptions = generateRegexpuOptions;
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var _features = require("./features");
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function generateRegexpuOptions(node, features) {
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let useUnicodeFlag = false,
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dotAllFlag = false,
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unicodePropertyEscape = false,
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namedGroup = false;
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const {
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flags,
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pattern
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} = node;
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const flagsIncludesU = flags.includes("u");
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if (flagsIncludesU) {
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if (!(0, _features.hasFeature)(features, _features.FEATURES.unicodeFlag)) {
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useUnicodeFlag = true;
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}
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if ((0, _features.hasFeature)(features, _features.FEATURES.unicodePropertyEscape) && /\\[pP]{/.test(pattern)) {
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unicodePropertyEscape = true;
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}
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}
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if ((0, _features.hasFeature)(features, _features.FEATURES.dotAllFlag) && flags.indexOf("s") >= 0) {
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dotAllFlag = true;
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}
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if ((0, _features.hasFeature)(features, _features.FEATURES.namedCaptureGroups) && /\(\?<(?![=!])/.test(pattern)) {
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namedGroup = true;
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}
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if (!namedGroup && !unicodePropertyEscape && !dotAllFlag && (!flagsIncludesU || useUnicodeFlag)) {
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return null;
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}
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if (flagsIncludesU && flags.indexOf("s") >= 0) {
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dotAllFlag = true;
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}
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return {
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useUnicodeFlag,
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onNamedGroup: () => {},
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namedGroup,
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unicodePropertyEscape,
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dotAllFlag,
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lookbehind: true
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};
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}
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