init

node_modules/@babel/helper-create-regexp-features-plugin/lib/util.js

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