Fix types

babel · Apr 27, 2022 · 1713327 · 1713327
1 parent f814fb6
commit 1713327
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Showing 2 changed files with 4 additions and 2 deletions.
diff --git a/packages/babel-generator/src/buffer.ts b/packages/babel-generator/src/buffer.ts
@@ -8,9 +8,11 @@ import type {
   Mapping,
 } from "@jridgewell/gen-mapping";
 
+type Mutable<T> = { -readonly [P in keyof T]: T[P] };
+
 type Result = {
   code: string;
-  map: EncodedSourceMap | undefined | null;
+  map: Mutable<EncodedSourceMap> | undefined | null;
   decodedMap: DecodedSourceMap | undefined | null;
   rawMappings: Mapping[] | null;
 };

diff --git a/packages/babel-generator/src/source-map.ts b/packages/babel-generator/src/source-map.ts
@@ -31,7 +31,7 @@ export default class SourceMap {
   private _lastSourceColumn = 0;
 
   constructor(
-    opts: { sourceFileName: string; sourceRoot?: string },
+    opts: { sourceFileName?: string; sourceRoot?: string },
     code: string | { [sourceFileName: string]: string },
   ) {
     const map = (this._map = new GenMapping({ sourceRoot: opts.sourceRoot }));