mirror of https://github.com/jkjoy/sunpeiwen.git
72 lines
2.2 KiB
JavaScript
72 lines
2.2 KiB
JavaScript
"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.canSkipRegexpu = canSkipRegexpu;
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exports.generateRegexpuOptions = generateRegexpuOptions;
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exports.transformFlags = transformFlags;
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var _features = require("./features");
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function generateRegexpuOptions(pattern, toTransform) {
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const feat = (name, ok = "transform") => {
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return (0, _features.hasFeature)(toTransform, _features.FEATURES[name]) ? ok : false;
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};
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const featDuplicateNamedGroups = () => {
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if (!feat("duplicateNamedCaptureGroups")) return false;
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const regex = /\(\?<([^>]+)>/g;
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const seen = new Set();
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for (let match; match = regex.exec(pattern); seen.add(match[1])) {
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if (seen.has(match[1])) return "transform";
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}
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return false;
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};
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return {
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unicodeFlag: feat("unicodeFlag"),
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unicodeSetsFlag: feat("unicodeSetsFlag") || feat("unicodeSetsFlag_syntax", "parse"),
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dotAllFlag: feat("dotAllFlag"),
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unicodePropertyEscapes: feat("unicodePropertyEscape"),
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namedGroups: feat("namedCaptureGroups") || featDuplicateNamedGroups(),
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onNamedGroup: () => {},
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modifiers: feat("modifiers")
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};
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}
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function canSkipRegexpu(node, options) {
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const {
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flags,
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pattern
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} = node;
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if (flags.includes("v")) {
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if (options.unicodeSetsFlag === "transform") return false;
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}
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if (flags.includes("u")) {
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if (options.unicodeFlag === "transform") return false;
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if (options.unicodePropertyEscapes === "transform" && /\\[pP]{/.test(pattern)) {
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return false;
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}
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}
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if (flags.includes("s")) {
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if (options.dotAllFlag === "transform") return false;
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}
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if (options.namedGroups === "transform" && /\(\?<(?![=!])/.test(pattern)) {
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return false;
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}
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if (options.modifiers === "transform" && /\(\?[\w-]+:/.test(pattern)) {
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return false;
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}
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return true;
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}
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function transformFlags(regexpuOptions, flags) {
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if (regexpuOptions.unicodeSetsFlag === "transform") {
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flags = flags.replace("v", "u");
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}
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if (regexpuOptions.unicodeFlag === "transform") {
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flags = flags.replace("u", "");
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}
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if (regexpuOptions.dotAllFlag === "transform") {
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flags = flags.replace("s", "");
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}
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return flags;
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}
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//# sourceMappingURL=util.js.map
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