From df994c40902976c797a04483845ad4095584dfa8 Mon Sep 17 00:00:00 2001
From: Simon Holthausen <simon.holthausen@vercel.com>
Date: Wed, 22 Nov 2023 23:28:54 +0100
Subject: [PATCH] chore: better error message for not using snippet type

language tools checks that a function passed to `{@render ..}` is returning a type that adheres to the `Snippet` return type. When it does not, the error message is pretty useless without this additional info text.
---
 packages/svelte/src/main/public.d.ts | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/packages/svelte/src/main/public.d.ts b/packages/svelte/src/main/public.d.ts
index e98a627342..d799204088 100644
--- a/packages/svelte/src/main/public.d.ts
+++ b/packages/svelte/src/main/public.d.ts
@@ -195,7 +195,11 @@ declare const SnippetReturn: unique symbol;
  * You can only call a snippet through the `{@render ...}` tag.
  */
 export interface Snippet<T = void> {
-	(arg: T): typeof SnippetReturn;
+	(
+		arg: T
+	): typeof SnippetReturn & {
+		_: 'functions passed to {@render ...} tags must use the `Snippet` type imported from "svelte"';
+	};
 }
 
 interface DispatchOptions {