Named layouts for +error.svelte

[madeleineostoja]

Describe the problem

I'm in the middle of migrating a very large Sveltekit project to the new routing system, and I'm trying to take advantage of sibling layout inheritance, by putting low level stuff (data loading, base metadata, auth guards, etc) that was previously duplicated between layouts in a default layout and then using named layouts for the layouts I had.

This was working great until I came to +error.svelte, when I try to use my new named layout (layout → layout-root) kit throws an error about + being a reserved character.

Describe the proposed solution

+error should be able to use named layouts, eg: +error@root.

Alternatives considered

Go back to sharing data loading etc with a higher order function, rather than the "sveltekit" way with layout inheritence.

Importance

nice to have

Additional Information

No response

[dummdidumm]

Duplicate of #4582