callback! macro for yew_functional

[lukechu10]

One pain point when using functional components is cloning all the Rcs into callbacks/closures.

For example, just by looking at the documentation here https://yew.rs/docs/en/next/concepts/function-components/pre-defined-hooks#use_state, counter is first cloned in a separate scope.

This is very unergonomic and adds an additional indentation level.
In my own projects, I use the enclose crate but it doesn't seem to be mature/popular enough to official recommend it.

I propose adding a simple macro called callback! or cb! built into yew_functional that provides similar functionality. Since this could be specifically tailored for functional components, we could even automatically wrap the closure in a Callback. This would also partially solve issue #1657.

[ranile]

That just sounds like bandied over a bigger issue, components being unaware of their lifetime which requires callbacks to be 'static. That would also solve/help in solving #1656. Once that issue is solved, there won't be need to clone values which would make creating callbacks more ergonomic.

In the meantime, I wouldn't mind implementing this macro if it's desired.

[lukechu10]

How would such a lifetime be represented? Could we somehow add a lifetime to the component struct?