Binding spread attributes

[RiseNet-Web]

Is your feature request related to a problem? Please describe.
I try, to create some component, and i would like use spread attributes. However we can't bind this kind of attributes. Tha's why I think about a solution

Describe the solution you'd like
bind spread like bind:{...attributes}

Describe alternatives you've considered
I don't an other alternatives

How important is this feature to you?
I think it's important, but it's not like a principal feature.

Additional context
Add any other context or screenshots about the feature request here.

[Florian-Schoenherr]

I have no idea how svelte does stuff internally, but some suggestions:

• bind:props={...props} would make props reserved
• bind:{...props} doesn't look like correct syntax
• maybe bind:$$props={...props}?

Basically, bind:???={...props}

[HamishWHC]

I don't think props being reserved should be a major issue, given that this is already reserved.
Another option may be {...bind:props}, based on the existing spread syntax? I don't think : is a valid character for variable names, so this shouldn't break anything.

[Florian-Schoenherr]

Both great, we just need someone to see this who knows more about internals / which one is easier to implement.
Or a hero who implements it 😄

[HamishWHC]

Took a poke around, and it seems this is where spread parsing occurs: https://github.com/sveltejs/svelte/blob/master/src/compiler/parse/state/tag.ts#L310 Given that {...bind:props} is just adding bind: after the spread operator, this part should be simple. Now to figure out compilation.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[sxxov]

I've written an RFC at sveltejs/rfcs#57 in an attempt to propose a solution for this. Anyone one looking at this problem should feel free to chime in.