Add extra attributes to functions and structs

[jfecher]

Problem

Feature request comes from a slack request.

There is no way to add new attributes to functions or structs while metaprogramming

Happy Case

We could add the functions:

impl FunctionDefinition {
    fn add_attribute<N>(self, attribute: str<N>) {}
}

impl StructDefinition {
    fn add_attribute<N>(self, attribute: str<N>) {}
}

The example given to me was to add #[abi(tag)] or #[recursive].
Using strings is a bit awkward here but attributes internally remain as strings until they're later parsed so using Quoted would also be awkward. Using just strings prevents users from quoting/unquoting code to create these attributes though.

Workaround

None

Workaround Description

No response

Additional Context

No response

Project Impact

None

Blocker Context

No response

Would you like to submit a PR for this Issue?

None

Support Needs

No response