From 3fe838c8353a5f14b338278fc8509c2ebe89e3d2 Mon Sep 17 00:00:00 2001
From: Yang Mingshan <y.mingshan3@gmail.com>
Date: Thu, 21 Sep 2023 16:32:39 +0800
Subject: [PATCH] refactor: replace `const enum` with `enum`

---
 packages/compiler-core/src/ast.ts             |   8 +-
 .../compiler-core/src/compat/compatConfig.ts  |   2 +-
 packages/compiler-core/src/errors.ts          |   2 +-
 packages/compiler-core/src/options.ts         |   2 +-
 packages/compiler-core/src/parse.ts           |   4 +-
 packages/compiler-core/src/utils.ts           |   2 +-
 packages/compiler-dom/src/errors.ts           |   4 +-
 packages/compiler-dom/src/parserOptions.ts    |   2 +-
 .../src/transforms/stringifyStatic.ts         |   2 +-
 packages/compiler-sfc/src/style/cssVars.ts    |   2 +-
 packages/compiler-ssr/src/errors.ts           |   4 +-
 packages/reactivity/src/index.ts              |   7 +-
 packages/reactivity/src/operations.ts         |   4 +-
 packages/reactivity/src/reactive.ts           |   4 +-
 .../runtime-core/src/compat/compatConfig.ts   |   2 +-
 packages/runtime-core/src/componentOptions.ts |   2 +-
 packages/runtime-core/src/componentProps.ts   |   2 +-
 .../src/componentPublicInstance.ts            |   2 +-
 .../runtime-core/src/components/Teleport.ts   |   2 +-
 packages/runtime-core/src/devtools.ts         |   2 +-
 packages/runtime-core/src/enums.ts            |   2 +-
 packages/runtime-core/src/errorHandling.ts    |   2 +-
 packages/runtime-core/src/hydration.ts        |   2 +-
 packages/runtime-core/src/renderer.ts         |   2 +-
 packages/runtime-test/src/nodeOps.ts          |   4 +-
 packages/shared/src/patchFlags.ts             |   2 +-
 packages/shared/src/shapeFlags.ts             |   2 +-
 packages/shared/src/slotFlags.ts              |   2 +-
 packages/vue/macros.d.ts                      |   2 +-
 rollup.config.js                              |   5 +-
 scripts/build.js                              |   4 +-
 scripts/{const-enum.js => enum.js}            | 125 +++---------------
 32 files changed, 62 insertions(+), 153 deletions(-)
 rename scripts/{const-enum.js => enum.js} (53%)

diff --git a/packages/compiler-core/src/ast.ts b/packages/compiler-core/src/ast.ts
index 515083c336a..a3c125bf60b 100644
--- a/packages/compiler-core/src/ast.ts
+++ b/packages/compiler-core/src/ast.ts
@@ -21,11 +21,11 @@ import { ImportItem, TransformContext } from './transform'
 // compilers.
 export type Namespace = number
 
-export const enum Namespaces {
+export enum Namespaces {
   HTML
 }
 
-export const enum NodeTypes {
+export enum NodeTypes {
   ROOT,
   ELEMENT,
   TEXT,
@@ -59,7 +59,7 @@ export const enum NodeTypes {
   JS_RETURN_STATEMENT
 }
 
-export const enum ElementTypes {
+export enum ElementTypes {
   ELEMENT,
   COMPONENT,
   SLOT,
@@ -202,7 +202,7 @@ export interface DirectiveNode extends Node {
  * Higher levels implies lower levels. e.g. a node that can be stringified
  * can always be hoisted and skipped for patch.
  */
-export const enum ConstantTypes {
+export enum ConstantTypes {
   NOT_CONSTANT = 0,
   CAN_SKIP_PATCH,
   CAN_HOIST,
diff --git a/packages/compiler-core/src/compat/compatConfig.ts b/packages/compiler-core/src/compat/compatConfig.ts
index dcb304263b4..83f9d6ea3cf 100644
--- a/packages/compiler-core/src/compat/compatConfig.ts
+++ b/packages/compiler-core/src/compat/compatConfig.ts
@@ -13,7 +13,7 @@ export interface CompilerCompatOptions {
   compatConfig?: CompilerCompatConfig
 }
 
-export const enum CompilerDeprecationTypes {
+export enum CompilerDeprecationTypes {
   COMPILER_IS_ON_ELEMENT = 'COMPILER_IS_ON_ELEMENT',
   COMPILER_V_BIND_SYNC = 'COMPILER_V_BIND_SYNC',
   COMPILER_V_BIND_PROP = 'COMPILER_V_BIND_PROP',
diff --git a/packages/compiler-core/src/errors.ts b/packages/compiler-core/src/errors.ts
index 36ab783edbe..1fbd5fd5b49 100644
--- a/packages/compiler-core/src/errors.ts
+++ b/packages/compiler-core/src/errors.ts
@@ -37,7 +37,7 @@ export function createCompilerError<T extends number>(
   return error
 }
 
-export const enum ErrorCodes {
+export enum ErrorCodes {
   // parse errors
   ABRUPT_CLOSING_OF_EMPTY_COMMENT,
   CDATA_IN_HTML_CONTENT,
diff --git a/packages/compiler-core/src/options.ts b/packages/compiler-core/src/options.ts
index 65bbcb36dd6..069f2256b92 100644
--- a/packages/compiler-core/src/options.ts
+++ b/packages/compiler-core/src/options.ts
@@ -73,7 +73,7 @@ export type HoistTransform = (
   parent: ParentNode
 ) => void
 
-export const enum BindingTypes {
+export enum BindingTypes {
   /**
    * returned from data()
    */
diff --git a/packages/compiler-core/src/parse.ts b/packages/compiler-core/src/parse.ts
index b72ad028b4b..4c536c5c9cb 100644
--- a/packages/compiler-core/src/parse.ts
+++ b/packages/compiler-core/src/parse.ts
@@ -80,7 +80,7 @@ export const defaultParserOptions: MergedParserOptions = {
   comments: __DEV__
 }
 
-export const enum TextModes {
+export enum TextModes {
   //          | Elements | Entities | End sign              | Inside of
   DATA, //    | ✔        | ✔        | End tags of ancestors |
   RCDATA, //  | ✘        | ✔        | End tag of the parent | <textarea>
@@ -502,7 +502,7 @@ function parseElement(
   return element
 }
 
-const enum TagType {
+enum TagType {
   Start,
   End
 }
diff --git a/packages/compiler-core/src/utils.ts b/packages/compiler-core/src/utils.ts
index bd2882b09e2..1005ca1f383 100644
--- a/packages/compiler-core/src/utils.ts
+++ b/packages/compiler-core/src/utils.ts
@@ -64,7 +64,7 @@ const nonIdentifierRE = /^\d|[^\$\w]/
 export const isSimpleIdentifier = (name: string): boolean =>
   !nonIdentifierRE.test(name)
 
-const enum MemberExpLexState {
+enum MemberExpLexState {
   inMemberExp,
   inBrackets,
   inParens,
diff --git a/packages/compiler-dom/src/errors.ts b/packages/compiler-dom/src/errors.ts
index b519dbdb762..f8582c0b6ac 100644
--- a/packages/compiler-dom/src/errors.ts
+++ b/packages/compiler-dom/src/errors.ts
@@ -20,7 +20,7 @@ export function createDOMCompilerError(
   ) as DOMCompilerError
 }
 
-export const enum DOMErrorCodes {
+export enum DOMErrorCodes {
   X_V_HTML_NO_EXPRESSION = 53 /* ErrorCodes.__EXTEND_POINT__ */,
   X_V_HTML_WITH_CHILDREN,
   X_V_TEXT_NO_EXPRESSION,
@@ -36,7 +36,7 @@ export const enum DOMErrorCodes {
 }
 
 if (__TEST__) {
-  // esbuild cannot infer const enum increments if first value is from another
+  // esbuild cannot infer enum increments if first value is from another
   // file, so we have to manually keep them in sync. this check ensures it
   // errors out if there are collisions.
   if (DOMErrorCodes.X_V_HTML_NO_EXPRESSION < ErrorCodes.__EXTEND_POINT__) {
diff --git a/packages/compiler-dom/src/parserOptions.ts b/packages/compiler-dom/src/parserOptions.ts
index 4d06a776b7a..f7918903de3 100644
--- a/packages/compiler-dom/src/parserOptions.ts
+++ b/packages/compiler-dom/src/parserOptions.ts
@@ -15,7 +15,7 @@ const isRawTextContainer = /*#__PURE__*/ makeMap(
   true
 )
 
-export const enum DOMNamespaces {
+export enum DOMNamespaces {
   HTML = 0 /* Namespaces.HTML */,
   SVG,
   MATH_ML
diff --git a/packages/compiler-dom/src/transforms/stringifyStatic.ts b/packages/compiler-dom/src/transforms/stringifyStatic.ts
index 0b47cb435b0..b26cbb08945 100644
--- a/packages/compiler-dom/src/transforms/stringifyStatic.ts
+++ b/packages/compiler-dom/src/transforms/stringifyStatic.ts
@@ -33,7 +33,7 @@ import {
 } from '@vue/shared'
 import { DOMNamespaces } from '../parserOptions'
 
-export const enum StringifyThresholds {
+export enum StringifyThresholds {
   ELEMENT_WITH_BINDING_COUNT = 5,
   NODE_COUNT = 20
 }
diff --git a/packages/compiler-sfc/src/style/cssVars.ts b/packages/compiler-sfc/src/style/cssVars.ts
index 2380959b819..635d24b2de3 100644
--- a/packages/compiler-sfc/src/style/cssVars.ts
+++ b/packages/compiler-sfc/src/style/cssVars.ts
@@ -70,7 +70,7 @@ export function parseCssVars(sfc: SFCDescriptor): string[] {
   return vars
 }
 
-const enum LexerState {
+enum LexerState {
   inParens,
   inSingleQuoteString,
   inDoubleQuoteString
diff --git a/packages/compiler-ssr/src/errors.ts b/packages/compiler-ssr/src/errors.ts
index e8e5a3a541d..c75a87e2a00 100644
--- a/packages/compiler-ssr/src/errors.ts
+++ b/packages/compiler-ssr/src/errors.ts
@@ -16,14 +16,14 @@ export function createSSRCompilerError(
   return createCompilerError(code, loc, SSRErrorMessages) as SSRCompilerError
 }
 
-export const enum SSRErrorCodes {
+export enum SSRErrorCodes {
   X_SSR_UNSAFE_ATTR_NAME = 65 /* DOMErrorCodes.__EXTEND_POINT__ */,
   X_SSR_NO_TELEPORT_TARGET,
   X_SSR_INVALID_AST_NODE
 }
 
 if (__TEST__) {
-  // esbuild cannot infer const enum increments if first value is from another
+  // esbuild cannot infer enum increments if first value is from another
   // file, so we have to manually keep them in sync. this check ensures it
   // errors out if there are collisions.
   if (SSRErrorCodes.X_SSR_UNSAFE_ATTR_NAME < DOMErrorCodes.__EXTEND_POINT__) {
diff --git a/packages/reactivity/src/index.ts b/packages/reactivity/src/index.ts
index ee4da5b1935..3ea967dd972 100644
--- a/packages/reactivity/src/index.ts
+++ b/packages/reactivity/src/index.ts
@@ -31,7 +31,7 @@ export {
   shallowReadonly,
   markRaw,
   toRaw,
-  ReactiveFlags /* @remove */,
+  ReactiveFlags,
   type Raw,
   type DeepReadonly,
   type ShallowReactive,
@@ -69,7 +69,4 @@ export {
   getCurrentScope,
   onScopeDispose
 } from './effectScope'
-export {
-  TrackOpTypes /* @remove */,
-  TriggerOpTypes /* @remove */
-} from './operations'
+export { TrackOpTypes, TriggerOpTypes } from './operations'
diff --git a/packages/reactivity/src/operations.ts b/packages/reactivity/src/operations.ts
index 1b96e982571..898b9f75178 100644
--- a/packages/reactivity/src/operations.ts
+++ b/packages/reactivity/src/operations.ts
@@ -1,13 +1,13 @@
 // using literal strings instead of numbers so that it's easier to inspect
 // debugger events
 
-export const enum TrackOpTypes {
+export enum TrackOpTypes {
   GET = 'get',
   HAS = 'has',
   ITERATE = 'iterate'
 }
 
-export const enum TriggerOpTypes {
+export enum TriggerOpTypes {
   SET = 'set',
   ADD = 'add',
   DELETE = 'delete',
diff --git a/packages/reactivity/src/reactive.ts b/packages/reactivity/src/reactive.ts
index 1881955cf1c..9437c7ae18d 100644
--- a/packages/reactivity/src/reactive.ts
+++ b/packages/reactivity/src/reactive.ts
@@ -13,7 +13,7 @@ import {
 } from './collectionHandlers'
 import type { UnwrapRefSimple, Ref, RawSymbol } from './ref'
 
-export const enum ReactiveFlags {
+export enum ReactiveFlags {
   SKIP = '__v_skip',
   IS_REACTIVE = '__v_isReactive',
   IS_READONLY = '__v_isReadonly',
@@ -34,7 +34,7 @@ export const shallowReactiveMap = new WeakMap<Target, any>()
 export const readonlyMap = new WeakMap<Target, any>()
 export const shallowReadonlyMap = new WeakMap<Target, any>()
 
-const enum TargetType {
+enum TargetType {
   INVALID = 0,
   COMMON = 1,
   COLLECTION = 2
diff --git a/packages/runtime-core/src/compat/compatConfig.ts b/packages/runtime-core/src/compat/compatConfig.ts
index 88b58fdfab0..9ae34c07a5c 100644
--- a/packages/runtime-core/src/compat/compatConfig.ts
+++ b/packages/runtime-core/src/compat/compatConfig.ts
@@ -10,7 +10,7 @@ import {
 } from '../component'
 import { warn } from '../warning'
 
-export const enum DeprecationTypes {
+export enum DeprecationTypes {
   GLOBAL_MOUNT = 'GLOBAL_MOUNT',
   GLOBAL_MOUNT_CONTAINER = 'GLOBAL_MOUNT_CONTAINER',
   GLOBAL_EXTEND = 'GLOBAL_EXTEND',
diff --git a/packages/runtime-core/src/componentOptions.ts b/packages/runtime-core/src/componentOptions.ts
index de4d304448a..6a7484f7255 100644
--- a/packages/runtime-core/src/componentOptions.ts
+++ b/packages/runtime-core/src/componentOptions.ts
@@ -586,7 +586,7 @@ export type OptionTypesType<
   Defaults: Defaults
 }
 
-const enum OptionTypes {
+enum OptionTypes {
   PROPS = 'Props',
   DATA = 'Data',
   COMPUTED = 'Computed',
diff --git a/packages/runtime-core/src/componentProps.ts b/packages/runtime-core/src/componentProps.ts
index 4d402789555..c91a70724e9 100644
--- a/packages/runtime-core/src/componentProps.ts
+++ b/packages/runtime-core/src/componentProps.ts
@@ -164,7 +164,7 @@ export type ExtractPublicPropTypes<O> = {
   [K in keyof Pick<O, PublicOptionalKeys<O>>]?: InferPropType<O[K]>
 }
 
-const enum BooleanFlags {
+enum BooleanFlags {
   shouldCast,
   shouldCastTrue
 }
diff --git a/packages/runtime-core/src/componentPublicInstance.ts b/packages/runtime-core/src/componentPublicInstance.ts
index dc575aafff9..8928d790139 100644
--- a/packages/runtime-core/src/componentPublicInstance.ts
+++ b/packages/runtime-core/src/componentPublicInstance.ts
@@ -278,7 +278,7 @@ if (__COMPAT__) {
   installCompatInstanceProperties(publicPropertiesMap)
 }
 
-const enum AccessTypes {
+enum AccessTypes {
   OTHER,
   SETUP,
   DATA,
diff --git a/packages/runtime-core/src/components/Teleport.ts b/packages/runtime-core/src/components/Teleport.ts
index 19ccbc5de27..2243a104c31 100644
--- a/packages/runtime-core/src/components/Teleport.ts
+++ b/packages/runtime-core/src/components/Teleport.ts
@@ -269,7 +269,7 @@ export const TeleportImpl = {
   hydrate: hydrateTeleport
 }
 
-export const enum TeleportMoveTypes {
+export enum TeleportMoveTypes {
   TARGET_CHANGE,
   TOGGLE, // enable / disable
   REORDER // moved in the main view
diff --git a/packages/runtime-core/src/devtools.ts b/packages/runtime-core/src/devtools.ts
index bf67093f5c3..240a4aa04a7 100644
--- a/packages/runtime-core/src/devtools.ts
+++ b/packages/runtime-core/src/devtools.ts
@@ -10,7 +10,7 @@ interface AppRecord {
   types: Record<string, string | Symbol>
 }
 
-const enum DevtoolsHooks {
+enum DevtoolsHooks {
   APP_INIT = 'app:init',
   APP_UNMOUNT = 'app:unmount',
   COMPONENT_UPDATED = 'component:updated',
diff --git a/packages/runtime-core/src/enums.ts b/packages/runtime-core/src/enums.ts
index 63d829d7a87..829e2555d32 100644
--- a/packages/runtime-core/src/enums.ts
+++ b/packages/runtime-core/src/enums.ts
@@ -1,4 +1,4 @@
-export const enum LifecycleHooks {
+export enum LifecycleHooks {
   BEFORE_CREATE = 'bc',
   CREATED = 'c',
   BEFORE_MOUNT = 'bm',
diff --git a/packages/runtime-core/src/errorHandling.ts b/packages/runtime-core/src/errorHandling.ts
index afbd226c4c6..39afdb9e6e4 100644
--- a/packages/runtime-core/src/errorHandling.ts
+++ b/packages/runtime-core/src/errorHandling.ts
@@ -6,7 +6,7 @@ import { LifecycleHooks } from './enums'
 
 // contexts where user provided function may be executed, in addition to
 // lifecycle hooks.
-export const enum ErrorCodes {
+export enum ErrorCodes {
   SETUP_FUNCTION,
   RENDER_FUNCTION,
   WATCH_GETTER,
diff --git a/packages/runtime-core/src/hydration.ts b/packages/runtime-core/src/hydration.ts
index 89a00886332..115330f12c8 100644
--- a/packages/runtime-core/src/hydration.ts
+++ b/packages/runtime-core/src/hydration.ts
@@ -30,7 +30,7 @@ export type RootHydrateFunction = (
   container: (Element | ShadowRoot) & { _vnode?: VNode }
 ) => void
 
-const enum DOMNodeTypes {
+enum DOMNodeTypes {
   ELEMENT = 1,
   TEXT = 3,
   COMMENT = 8
diff --git a/packages/runtime-core/src/renderer.ts b/packages/runtime-core/src/renderer.ts
index 383e17fb0f5..fa9d486da24 100644
--- a/packages/runtime-core/src/renderer.ts
+++ b/packages/runtime-core/src/renderer.ts
@@ -264,7 +264,7 @@ export type SetupRenderEffectFn = (
   optimized: boolean
 ) => void
 
-export const enum MoveType {
+export enum MoveType {
   ENTER,
   LEAVE,
   REORDER
diff --git a/packages/runtime-test/src/nodeOps.ts b/packages/runtime-test/src/nodeOps.ts
index a3a8012f280..e45dda1a06f 100644
--- a/packages/runtime-test/src/nodeOps.ts
+++ b/packages/runtime-test/src/nodeOps.ts
@@ -1,12 +1,12 @@
 import { markRaw } from '@vue/reactivity'
 
-export const enum TestNodeTypes {
+export enum TestNodeTypes {
   TEXT = 'text',
   ELEMENT = 'element',
   COMMENT = 'comment'
 }
 
-export const enum NodeOpTypes {
+export enum NodeOpTypes {
   CREATE = 'create',
   INSERT = 'insert',
   REMOVE = 'remove',
diff --git a/packages/shared/src/patchFlags.ts b/packages/shared/src/patchFlags.ts
index 58e8935aeb8..126931b7d87 100644
--- a/packages/shared/src/patchFlags.ts
+++ b/packages/shared/src/patchFlags.ts
@@ -16,7 +16,7 @@
  * Check the `patchElement` function in '../../runtime-core/src/renderer.ts' to see how the
  * flags are handled during diff.
  */
-export const enum PatchFlags {
+export enum PatchFlags {
   /**
    * Indicates an element with dynamic textContent (children fast path)
    */
diff --git a/packages/shared/src/shapeFlags.ts b/packages/shared/src/shapeFlags.ts
index 8defb8a3bf3..84825c7f198 100644
--- a/packages/shared/src/shapeFlags.ts
+++ b/packages/shared/src/shapeFlags.ts
@@ -1,4 +1,4 @@
-export const enum ShapeFlags {
+export enum ShapeFlags {
   ELEMENT = 1,
   FUNCTIONAL_COMPONENT = 1 << 1,
   STATEFUL_COMPONENT = 1 << 2,
diff --git a/packages/shared/src/slotFlags.ts b/packages/shared/src/slotFlags.ts
index 53860ff4dd1..805c7d7c693 100644
--- a/packages/shared/src/slotFlags.ts
+++ b/packages/shared/src/slotFlags.ts
@@ -1,4 +1,4 @@
-export const enum SlotFlags {
+export enum SlotFlags {
   /**
    * Stable slots that only reference slot props or context state. The slot
    * can fully capture its own dependencies so when passed down the parent won't
diff --git a/packages/vue/macros.d.ts b/packages/vue/macros.d.ts
index 68ccda6ee23..4f4f25395e7 100644
--- a/packages/vue/macros.d.ts
+++ b/packages/vue/macros.d.ts
@@ -10,7 +10,7 @@ import {
 
 export declare const RefType: unique symbol
 
-export declare const enum RefTypes {
+export declare enum RefTypes {
   Ref = 1,
   ComputedRef = 2,
   WritableComputedRef = 3
diff --git a/rollup.config.js b/rollup.config.js
index 7050ba437e6..a256e1b09be 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -12,7 +12,7 @@ import terser from '@rollup/plugin-terser'
 import esbuild from 'rollup-plugin-esbuild'
 import alias from '@rollup/plugin-alias'
 import { entries } from './scripts/aliases.js'
-import { constEnum } from './scripts/const-enum.js'
+import { enums } from './scripts/enum.js'
 
 if (!process.env.TARGET) {
   throw new Error('TARGET package must be specified via --environment flag.')
@@ -32,7 +32,7 @@ const pkg = require(resolve(`package.json`))
 const packageOptions = pkg.buildOptions || {}
 const name = packageOptions.filename || path.basename(packageDir)
 
-const [enumPlugin, enumDefines] = constEnum()
+const enumDefines = enums()
 
 const outputConfigs = {
   'esm-bundler': {
@@ -285,7 +285,6 @@ function createConfig(format, output, plugins = []) {
       alias({
         entries
       }),
-      enumPlugin,
       ...resolveReplace(),
       esbuild({
         tsconfig: path.resolve(__dirname, 'tsconfig.json'),
diff --git a/scripts/build.js b/scripts/build.js
index eb1ac33ac43..f3c4aff6c5f 100644
--- a/scripts/build.js
+++ b/scripts/build.js
@@ -17,7 +17,7 @@ nr build core --formats cjs
 */
 
 import fs from 'node:fs/promises'
-import { existsSync, readFileSync } from 'node:fs'
+import { existsSync } from 'node:fs'
 import path from 'node:path'
 import minimist from 'minimist'
 import { gzipSync, brotliCompressSync } from 'node:zlib'
@@ -26,7 +26,7 @@ import { execa, execaSync } from 'execa'
 import { cpus } from 'node:os'
 import { createRequire } from 'node:module'
 import { targets as allTargets, fuzzyMatchTarget } from './utils.js'
-import { scanEnums } from './const-enum.js'
+import { scanEnums } from './enum.js'
 import prettyBytes from 'pretty-bytes'
 
 const require = createRequire(import.meta.url)
diff --git a/scripts/const-enum.js b/scripts/enum.js
similarity index 53%
rename from scripts/const-enum.js
rename to scripts/enum.js
index e9f25bcef50..6bb3eb41f0c 100644
--- a/scripts/const-enum.js
+++ b/scripts/enum.js
@@ -1,15 +1,12 @@
 // @ts-check
 
 /**
- * We use rollup-plugin-esbuild for faster builds, but esbuild in isolation
- * mode compiles const enums into runtime enums, bloating bundle size.
+ * We used const enums before, but it caused some issues: #1228, so we
+ * switched to regular enums. But we still want to keep the zero-cost
+ * benefit of const enums.
  *
- * Here we pre-process all the const enums in the project and turn them into
- * global replacements, and remove the original declarations and re-exports.
- *
- * This erases the const enums before the esbuild transform so that we can
- * leverage esbuild's speed while retaining the DX and bundle size benefits
- * of const enums.
+ * Here we pre-process all the enums in the project and turn them into
+ * global replacements.
  *
  * This file is expected to be executed with project root as cwd.
  */
@@ -24,7 +21,6 @@ import {
 } from 'node:fs'
 import { parse } from '@babel/parser'
 import path from 'node:path'
-import MagicString from 'magic-string'
 
 const ENUM_CACHE_PATH = 'temp/enum.json'
 
@@ -36,16 +32,12 @@ function evaluate(exp) {
 // so the data can be shared across concurrent Rollup processes
 export function scanEnums() {
   /**
-   * @type {{ ranges: Record<string, [number, number][]>, defines: Record<string, string>, ids: string[] }}
+   * @type {Record<string, string>}
    */
-  const enumData = {
-    ranges: {},
-    defines: {},
-    ids: []
-  }
+  const enumDefines = {}
 
-  // 1. grep for files with exported const enum
-  const { stdout } = execaSync('git', ['grep', `export const enum`])
+  // 1. grep for files with exported enum
+  const { stdout } = execaSync('git', ['grep', `export enum`])
   const files = [...new Set(stdout.split('\n').map(line => line.split(':')[0]))]
 
   // 2. parse matched files to collect enum info
@@ -63,29 +55,18 @@ export function scanEnums() {
         node.declaration &&
         node.declaration.type === 'TSEnumDeclaration'
       ) {
-        if (file in enumData.ranges) {
-          // @ts-ignore
-          enumData.ranges[file].push([node.start, node.end])
-        } else {
-          // @ts-ignore
-          enumData.ranges[file] = [[node.start, node.end]]
-        }
-
         const decl = node.declaration
         let lastInitialized
         for (let i = 0; i < decl.members.length; i++) {
           const e = decl.members[i]
           const id = decl.id.name
-          if (!enumData.ids.includes(id)) {
-            enumData.ids.push(id)
-          }
           const key = e.id.type === 'Identifier' ? e.id.name : e.id.value
           const fullKey = `${id}.${key}`
           const saveValue = value => {
-            if (fullKey in enumData.defines) {
+            if (fullKey in enumDefines) {
               throw new Error(`name conflict for enum ${id} in ${file}`)
             }
-            enumData.defines[fullKey] = JSON.stringify(value)
+            enumDefines[fullKey] = JSON.stringify(value)
           }
           const init = e.initializer
           if (init) {
@@ -107,12 +88,12 @@ export function scanEnums() {
                   return node.value
                 } else if (node.type === 'MemberExpression') {
                   const exp = content.slice(node.start, node.end)
-                  if (!(exp in enumData.defines)) {
+                  if (!(exp in enumDefines)) {
                     throw new Error(
                       `unhandled enum initialization expression ${exp} in ${file}`
                     )
                   }
-                  return enumData.defines[exp]
+                  return enumDefines[exp]
                 } else {
                   throw new Error(
                     `unhandled BinaryExpression operand type ${node.type} in ${file}`
@@ -164,7 +145,7 @@ export function scanEnums() {
 
   // 3. save cache
   if (!existsSync('temp')) mkdirSync('temp')
-  writeFileSync(ENUM_CACHE_PATH, JSON.stringify(enumData))
+  writeFileSync(ENUM_CACHE_PATH, JSON.stringify(enumDefines))
 
   return () => {
     rmSync(ENUM_CACHE_PATH, { force: true })
@@ -172,84 +153,16 @@ export function scanEnums() {
 }
 
 /**
- * @returns {[import('rollup').Plugin, Record<string, string>]}
+ * @returns {Record<string, string>}
  */
-export function constEnum() {
+export function enums() {
   if (!existsSync(ENUM_CACHE_PATH)) {
     throw new Error('enum cache needs to be initialized before creating plugin')
   }
   /**
-   * @type {{ ranges: Record<string, [number, number][]>, defines: Record<string, string>, ids: string[] }}
-   */
-  const enumData = JSON.parse(readFileSync(ENUM_CACHE_PATH, 'utf-8'))
-
-  // construct a regex for matching re-exports of known const enums
-  const reExportsRE = new RegExp(
-    `export {[^}]*?\\b(${enumData.ids.join('|')})\\b[^]*?}`
-  )
-
-  // 3. during transform:
-  //    3.1 files w/ const enum declaration: remove declaration
-  //    3.2 files using const enum: inject into esbuild define
-  /**
-   * @type {import('rollup').Plugin}
+   * @type {Record<string, string>}
    */
-  const plugin = {
-    name: 'remove-const-enum',
-    transform(code, id) {
-      let s
-
-      if (id in enumData.ranges) {
-        s = s || new MagicString(code)
-        for (const [start, end] of enumData.ranges[id]) {
-          s.remove(start, end)
-        }
-      }
-
-      // check for const enum re-exports that must be removed
-      if (reExportsRE.test(code)) {
-        s = s || new MagicString(code)
-        const ast = parse(code, {
-          plugins: ['typescript'],
-          sourceType: 'module'
-        })
-        for (const node of ast.program.body) {
-          if (
-            node.type === 'ExportNamedDeclaration' &&
-            node.exportKind !== 'type' &&
-            node.source
-          ) {
-            for (let i = 0; i < node.specifiers.length; i++) {
-              const spec = node.specifiers[i]
-              if (
-                spec.type === 'ExportSpecifier' &&
-                spec.exportKind !== 'type' &&
-                enumData.ids.includes(spec.local.name)
-              ) {
-                const next = node.specifiers[i + 1]
-                if (next) {
-                  // @ts-ignore
-                  s.remove(spec.start, next.start)
-                } else {
-                  // last one
-                  const prev = node.specifiers[i - 1]
-                  // @ts-ignore
-                  s.remove(prev ? prev.end : spec.start, spec.end)
-                }
-              }
-            }
-          }
-        }
-      }
-
-      if (s) {
-        return {
-          code: s.toString(),
-          map: s.generateMap()
-        }
-      }
-    }
-  }
+  const enumDefines = JSON.parse(readFileSync(ENUM_CACHE_PATH, 'utf-8'))
 
-  return [plugin, enumData.defines]
+  return enumDefines
 }