From b1ca13bb472d4b450f2494ac7676dd7a9d96319a Mon Sep 17 00:00:00 2001
From: hjf <hjf@hjf.com.ar>
Date: Mon, 4 Aug 2025 14:49:25 -0300
Subject: [PATCH] fix: onRecord accepts a different return type

---
 packages/csv-parse/lib/index.d.ts | 6 +++---
 packages/csv-parse/lib/sync.d.ts  | 8 ++++----
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/packages/csv-parse/lib/index.d.ts b/packages/csv-parse/lib/index.d.ts
index 898f74b6..4b6f2522 100644
--- a/packages/csv-parse/lib/index.d.ts
+++ b/packages/csv-parse/lib/index.d.ts
@@ -258,7 +258,7 @@ Note, could not `extends stream.TransformOptions` because encoding can be
 BufferEncoding and undefined as well as null which is not defined in the
 extended type.
 */
-export interface Options<T = string[]> {
+export interface Options<T = string[], U = T> {
   /**
    * If true, the parser will attempt to convert read data types to native types.
    * @deprecated Use {@link cast}
@@ -366,8 +366,8 @@ export interface Options<T = string[]> {
   /**
    * Alter and filter records by executing a user defined function.
    */
-  on_record?: (record: T, context: InfoRecord) => T | null | undefined;
-  onRecord?: (record: T, context: InfoRecord) => T | null | undefined;
+  on_record?: (record: T, context: InfoRecord) => U | null | undefined;
+  onRecord?: (record: T, context: InfoRecord) => U | null | undefined;
   /**
    * Function called when an error occured if the `skip_records_with_error`
    * option is activated.
diff --git a/packages/csv-parse/lib/sync.d.ts b/packages/csv-parse/lib/sync.d.ts
index 4686a61b..057b735d 100644
--- a/packages/csv-parse/lib/sync.d.ts
+++ b/packages/csv-parse/lib/sync.d.ts
@@ -1,13 +1,13 @@
 import { Options } from "./index.js";
 
-type OptionsWithColumns<T> = Omit<Options<T>, "columns"> & {
+type OptionsWithColumns<T, U> = Omit<Options<T>, "columns"> & {
   columns: Exclude<Options["columns"], undefined | false>;
 };
 
-declare function parse<T = unknown>(
+declare function parse<T = unknown, U = T>(
   input: Buffer | string | Uint8Array,
-  options: OptionsWithColumns<T>,
-): T[];
+  options: OptionsWithColumns<T, U>,
+): U[];
 declare function parse(
   input: Buffer | string | Uint8Array,
   options: Options,