Warning

This post was published 46 days ago. The information described in this article may have changed.

Info

This post is auto-generated from RSS feed The Rust Programming Language Forum - Latest topics. Source: Implementing a derive macro in terms of another derive

Let's say I have a crate that provides a derive macro:

#[derive(crate1::Foo)]
#[foo_param(blah)]
struct WantsFoo;

can I (in a separate crate) provide a derive macro that just delegates to the first one? e.g. I'd like this:

#[derive(crate2::FooBlah)]
struct WantsFoo;

to expand to the original definition.

The use case is to provide a special case ergonomic wrapper around the original (flexible and generic) functionality. I understand I can create a helper crate with ~all the logic from crate1::Foo and share that between two unrelated macros, but ideally, I'd achieve this without touching crate1 (no real reason it should know about crate2 and go out of its way to help it).

4 posts - 2 participants

Read full topic

🏷️ rust_feed