fix: preserve loc for comment nodes

sxzz · sxzz · commit e9d69effd54d · 2026-01-21T00:40:29.000+08:00
closes #168
diff --git a/src/debug.ts b/src/debug.ts
@@ -3,7 +3,7 @@
 
 import { Buffer } from 'node:buffer'
 
-export function printCodeWithSourceMap(code: string, result: any) {
+export function printCodeWithSourceMap(code: string, result: any): void {
   const codeWithMap = `\n\n${
     result.code
   }\n//# sourceMappingURL=data:application/json;base64,${Buffer.from(
diff --git a/src/fake-js.ts b/src/fake-js.ts
@@ -364,8 +364,11 @@ export function createFakeJsPlugin({
         const declarationId = declarationIdNode.value
         const declaration = getDeclaration(declarationId)
 
-        walkAST(declaration.decl, {
+        walkAST<t.Node | t.Comment>(declaration.decl, {
           enter(node) {
+            if (node.type === 'CommentBlock') {
+              return
+            }
             delete node.loc
           },
         })
@@ -435,7 +438,6 @@ export function createFakeJsPlugin({
     }
 
     const result = generate(file, {
-      comments: true,
       sourceMaps: sourcemap,
       sourceFileName: chunk.fileName,
     })
diff --git a/tests/__snapshots__/tsc.test.ts.snap b/tests/__snapshots__/tsc.test.ts.snap
@@ -364,8 +364,8 @@ declare function fn(): number;
  */
 interface Options {
   /**
-       * interface member
-       */
+   * interface member
+   */
   foo: string;
 }
 /**
