Add skip attribute to various derives

libs
21

It seems relevant and has not been mentioned yet, the crate derivative does a good job of implementing some standard traits automatically with ignoring some fields.

22

I wish Rust's attributes were namespaced! Fortunately serde self-namespaces in a way, it's #[serde(skip_serializing)] so it's less likely to conflict with some other macro or custom derive, but I wish we had more mechanisms to ensure that attribute macros will compose

I mean, I can see #[skip] possibly conflicting with something else, as well as the already stabilized #[default]

Rust should at least have a way to make an attribute visible only to a specific macro, something like #[macro_attr(myattrmacro, skip)] which makes #[skip] visible to #[myattrmacro], like this:

#[derive(Ord)]
#[myattrmacro]
pub struct A {
     #[macro_attr(myattrmacro, skip)]
     something: B,
}

So that #[myattrmacro] sees

pub struct A {
     #[skip]
     something: B,
}

And #[derive(Ord)] sees

pub struct A {
     something: B,
}
2 Likes
23

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