From 6a063ec26ca0dc3867a226342f491c8be8354071 Mon Sep 17 00:00:00 2001
From: paoloricciuti <ricciutipaolo@gmail.com>
Date: Tue, 14 Nov 2023 07:30:43 +0100
Subject: [PATCH] fix: allow svelte:self in snippets

---
 packages/svelte/src/compiler/errors.js                         | 2 +-
 packages/svelte/src/compiler/phases/1-parse/state/element.js   | 3 ++-
 .../tests/compiler-errors/samples/self-reference/_config.js    | 2 +-
 3 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/packages/svelte/src/compiler/errors.js b/packages/svelte/src/compiler/errors.js
index 51e0644c4c..615123088f 100644
--- a/packages/svelte/src/compiler/errors.js
+++ b/packages/svelte/src/compiler/errors.js
@@ -141,7 +141,7 @@ const special_elements = {
 	/** @param {string} name */
 	'duplicate-svelte-element': (name) => `A component can only have one <${name}> element`,
 	'invalid-self-placement': () =>
-		`<svelte:self> components can only exist inside {#if} blocks, {#each} blocks, or slots passed to components`,
+		`<svelte:self> components can only exist inside {#if} blocks, {#each} blocks, {#snippet} blocks or slots passed to components`,
 	'missing-svelte-element-definition': () => `<svelte:element> must have a 'this' attribute`,
 	'missing-svelte-component-definition': () => `<svelte:component> must have a 'this' attribute`,
 	'invalid-svelte-element-definition': () => `Invalid element definition — must be an {expression}`,
diff --git a/packages/svelte/src/compiler/phases/1-parse/state/element.js b/packages/svelte/src/compiler/phases/1-parse/state/element.js
index 8e69a92c6b..ab07df7e26 100644
--- a/packages/svelte/src/compiler/phases/1-parse/state/element.js
+++ b/packages/svelte/src/compiler/phases/1-parse/state/element.js
@@ -331,7 +331,8 @@ function read_tag_name(parser) {
 			if (
 				fragment.type === 'IfBlock' ||
 				fragment.type === 'EachBlock' ||
-				fragment.type === 'Component'
+				fragment.type === 'Component' ||
+				fragment.type === 'SnippetBlock'
 			) {
 				legal = true;
 				break;
diff --git a/packages/svelte/tests/compiler-errors/samples/self-reference/_config.js b/packages/svelte/tests/compiler-errors/samples/self-reference/_config.js
index c1793c3043..5f5980b7ed 100644
--- a/packages/svelte/tests/compiler-errors/samples/self-reference/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/self-reference/_config.js
@@ -4,7 +4,7 @@ export default test({
 	error: {
 		code: 'invalid-self-placement',
 		message:
-			'<svelte:self> components can only exist inside {#if} blocks, {#each} blocks, or slots passed to components',
+			'<svelte:self> components can only exist inside {#if} blocks, {#each} blocks,, {#snippet} blocks or slots passed to components',
 		position: [1, 1]
 	}
 });