1 files changed, 71 insertions, 0 deletions
diff --git a/node_modules/@babel/helper-create-regexp-features-plugin/lib/util.js b/node_modules/@babel/helper-create-regexp-features-plugin/lib/util.js
new file mode 100644
index 00000000..7409090c
--- /dev/null
+++ b/node_modules/@babel/helper-create-regexp-features-plugin/lib/util.js
@@ -0,0 +1,71 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.canSkipRegexpu = canSkipRegexpu;
+exports.generateRegexpuOptions = generateRegexpuOptions;
+exports.transformFlags = transformFlags;
+var _features = require("./features.js");
+function generateRegexpuOptions(pattern, toTransform) {
+  const feat = (name, ok = "transform") => {
+    return (0, _features.hasFeature)(toTransform, _features.FEATURES[name]) ? ok : false;
+  };
+  const featDuplicateNamedGroups = () => {
+    if (!feat("duplicateNamedCaptureGroups")) return false;
+    const regex = /\(\?<([^>]+)>/g;
+    const seen = new Set();
+    for (let match; match = regex.exec(pattern); seen.add(match[1])) {
+      if (seen.has(match[1])) return "transform";
+    }
+    return false;
+  };
+  return {
+    unicodeFlag: feat("unicodeFlag"),
+    unicodeSetsFlag: feat("unicodeSetsFlag") || "parse",
+    dotAllFlag: feat("dotAllFlag"),
+    unicodePropertyEscapes: feat("unicodePropertyEscape"),
+    namedGroups: feat("namedCaptureGroups") || featDuplicateNamedGroups(),
+    onNamedGroup: () => {},
+    modifiers: feat("modifiers")
+  };
+}
+function canSkipRegexpu(node, options) {
+  const {
+    flags,
+    pattern
+  } = node;
+  if (flags.includes("v")) {
+    if (options.unicodeSetsFlag === "transform") return false;
+  }
+  if (flags.includes("u")) {
+    if (options.unicodeFlag === "transform") return false;
+    if (options.unicodePropertyEscapes === "transform" && /\\[pP]{/.test(pattern)) {
+      return false;
+    }
+  }
+  if (flags.includes("s")) {
+    if (options.dotAllFlag === "transform") return false;
+  }
+  if (options.namedGroups === "transform" && /\(\?<(?![=!])/.test(pattern)) {
+    return false;
+  }
+  if (options.modifiers === "transform" && /\(\?[\w-]+:/.test(pattern)) {
+    return false;
+  }
+  return true;
+}
+function transformFlags(regexpuOptions, flags) {
+  if (regexpuOptions.unicodeSetsFlag === "transform") {
+    flags = flags.replace("v", "u");
+  }
+  if (regexpuOptions.unicodeFlag === "transform") {
+    flags = flags.replace("u", "");
+  }
+  if (regexpuOptions.dotAllFlag === "transform") {
+    flags = flags.replace("s", "");
+  }
+  return flags;
+}
+
+//# sourceMappingURL=util.js.map