Mark wrapNativeSuper and wrapRegExp as pure (#11134)

packages/babel-helper-create-regexp-features-plugin/package.json

@@ -18,6 +18,7 @@
     "babel-plugin"
   ],
   "dependencies": {
+    "@babel/helper-annotate-as-pure": "^7.8.3",
     "@babel/helper-regex": "^7.8.3",
     "regexpu-core": "^4.6.0"
   },

packages/babel-helper-create-regexp-features-plugin/src/index.js

@@ -11,6 +11,7 @@ import { generateRegexpuOptions } from "./util";
 import pkg from "../package.json";
 import { types as t } from "@babel/core";
 import { pullFlag } from "@babel/helper-regex";
+import annotateAsPure from "@babel/helper-annotate-as-pure";
 
 // Note: Versions are represented as an integer. e.g. 7.1.5 is represented
 //       as 70000100005. This method is easier than using a semver-parsing
@@ -68,12 +69,13 @@ export function createRegExpFeaturePlugin({ name, feature, options = {} }) {
           runtime &&
           !isRegExpTest(path)
         ) {
-          path.replaceWith(
-            t.callExpression(this.addHelper("wrapRegExp"), [
-              node,
-              t.valueToNode(namedCaptureGroups),
-            ]),
-          );
+          const call = t.callExpression(this.addHelper("wrapRegExp"), [
+            node,
+            t.valueToNode(namedCaptureGroups),
+          ]);
+          annotateAsPure(call);
+
+          path.replaceWith(call);
         }
         if (hasFeature(features, FEATURES.unicodeFlag)) {
           pullFlag(node, "u");

packages/babel-plugin-transform-classes/src/transformClass.js

@@ -6,6 +6,7 @@ import ReplaceSupers, {
 import optimiseCall from "@babel/helper-optimise-call-expression";
 import * as defineMap from "@babel/helper-define-map";
 import { traverse, template, types as t } from "@babel/core";
+import annotateAsPure from "@babel/helper-annotate-as-pure";
 
 type ReadonlySet<T> = Set<T> | { has(val: T): boolean };
 
@@ -565,11 +566,14 @@ export default function transformClass(
     const closureArgs = [];
 
     if (classState.isDerived) {
-      const arg = classState.extendsNative
-        ? t.callExpression(classState.file.addHelper("wrapNativeSuper"), [
-            t.cloneNode(superName),
-          ])
-        : t.cloneNode(superName);
+      let arg = t.cloneNode(superName);
+      if (classState.extendsNative) {
+        arg = t.callExpression(classState.file.addHelper("wrapNativeSuper"), [
+          arg,
+        ]);
+        annotateAsPure(arg);
+      }
+
       const param = classState.scope.generateUidIdentifierBasedOnNode(
         superName,
       );

packages/babel-plugin-transform-classes/test/fixtures/extend-builtins/loose/output.js

@@ -22,4 +22,4 @@ var List = /*#__PURE__*/function (_Array) {
   }
 
   return List;
-}(_wrapNativeSuper(Array));
+}( /*#__PURE__*/_wrapNativeSuper(Array));

packages/babel-plugin-transform-classes/test/fixtures/extend-builtins/spec/output.js

@@ -30,4 +30,4 @@ var List = /*#__PURE__*/function (_Array) {
   }
 
   return List;
-}(_wrapNativeSuper(Array));
+}( /*#__PURE__*/_wrapNativeSuper(Array));

packages/babel-plugin-transform-classes/test/fixtures/regression/8499/output.js

@@ -20,7 +20,7 @@ var CustomElement = /*#__PURE__*/function (_HTMLElement) {
   }
 
   return CustomElement;
-}(babelHelpers.wrapNativeSuper(HTMLElement));
+}( /*#__PURE__*/babelHelpers.wrapNativeSuper(HTMLElement));
 
 ;
 new CustomElement();

packages/babel-plugin-transform-named-capturing-groups-regex/test/fixtures/wrapper/basic/output.js

@@ -1,3 +1,3 @@
-"foo".match(babelHelpers.wrapRegExp(/(.)\1/, {
+"foo".match( /*#__PURE__*/babelHelpers.wrapRegExp(/(.)\1/, {
   double: 1
 }));

packages/babel-plugin-transform-named-capturing-groups-regex/test/fixtures/wrapper/skips-anonymous-capturing-groups/output.js

@@ -1,3 +1,3 @@
-"abba".match(babelHelpers.wrapRegExp(/(.)(.)\2\1/, {
+"abba".match( /*#__PURE__*/babelHelpers.wrapRegExp(/(.)(.)\2\1/, {
   n: 2
 }));

packages/babel-preset-env/test/fixtures/plugins-integration/issue-7527/output.js

@@ -32,6 +32,6 @@ var MyDate = /*#__PURE__*/function (_Date) {
   }
 
   return MyDate;
-}(_wrapNativeSuper(Date));
+}( /*#__PURE__*/_wrapNativeSuper(Date));
 
 var myDate = new MyDate();