convert @babel/helper-create-regexp-features-plugin to typescript (#13215)

packages/babel-helper-create-regexp-features-plugin/src/features.ts

@@ -1,4 +1,3 @@
-// @flow
 export const FEATURES = Object.freeze({
   unicodeFlag: 1 << 0,
   dotAllFlag: 1 << 1,
@@ -16,7 +15,7 @@ export const FEATURES = Object.freeze({
 export const featuresKey = "@babel/plugin-regexp-features/featuresKey";
 export const runtimeKey = "@babel/plugin-regexp-features/runtimeKey";
 
-type FeatureType = $Values<typeof FEATURES>;
+type FeatureType = typeof FEATURES[keyof typeof FEATURES];
 
 export function enableFeature(features: number, feature: FeatureType): number {
   return features | feature;

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

@@ -24,6 +24,8 @@ function pullFlag(node, flag: RegExpFlags): void {
   node.flags = node.flags.replace(flag, "");
 }
 
+declare const PACKAGE_JSON: { name: string; version: string };
+
 // 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
 //       package, but it breaks if we release x.y.z where x, y or z are
@@ -33,7 +35,11 @@ const version = PACKAGE_JSON.version
   .reduce((v, x) => v * 1e5 + +x, 0);
 const versionKey = "@babel/plugin-regexp-features/version";
 
-export function createRegExpFeaturePlugin({ name, feature, options = {} }) {
+export function createRegExpFeaturePlugin({
+  name,
+  feature,
+  options = {} as any,
+}) {
   return {
     name,
     pre() {

packages/babel-helper-create-regexp-features-plugin/src/util.ts

@@ -1,6 +1,15 @@
 import { FEATURES, hasFeature } from "./features";
 
-export function generateRegexpuOptions(node, features) {
+type RegexpuOptions = {
+  useUnicodeFlag: boolean;
+  onNamedGroup: (name: string, index: number) => void;
+  namedGroup: boolean;
+  unicodePropertyEscape: boolean;
+  dotAllFlag: boolean;
+  lookbehind: boolean;
+};
+
+export function generateRegexpuOptions(node, features): RegexpuOptions | null {
   let useUnicodeFlag = false,
     dotAllFlag = false,
     unicodePropertyEscape = false,

tsconfig.json

@@ -6,6 +6,7 @@
     "./packages/babel-core/src/**/*.ts",
     "./packages/babel-generator/src/**/*.ts",
     "./packages/babel-helper-annotate-as-pure/src/**/*.ts",
+    "./packages/babel-helper-create-regexp-features-plugin/src/**/*.ts",
     "./packages/babel-helper-explode-assignable-expression/src/**/*.ts",
     "./packages/babel-helper-fixtures/src/**/*.ts",
     "./packages/babel-helper-function-name/src/**/*.ts",
@@ -44,6 +45,9 @@
       "@babel/helper-annotate-as-pure": [
         "./packages/babel-helper-annotate-as-pure/src"
       ],
+      "@babel/helper-create-regexp-features-plugin": [
+        "./packages/babel-helper-create-regexp-features-plugin/src"
+      ],
       "@babel/helper-explode-assignable-expression": [
         "./packages/babel-helper-explode-assignable-expression/src"
       ],