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View Code? Open in Web Editor NEWGenerate enums with matching variants, but without any of the associated data.
Home Page: https://docs.rs/enum-kinds-macros
Generate enums with matching variants, but without any of the associated data.
Home Page: https://docs.rs/enum-kinds-macros
I'd like to have a private enum as an implementation detail of my library, but provide a public method (on another type) that returns its kind. However, it seems enum-kinds always copies the visibility of the original enum.
For example:
#[derive(EnumKind)]
#[enum_kind(FooKind)]
enum Foo {
A(u32),
B(u64),
}
pub fn get_a_foo() -> FooKind {
Foo::A(0).into()
}
This produces:
error[E0446]: private type `FooKind` in public interface
--> src/lib.rs:36:1
|
29 | #[derive(EnumKind)]
| -------- `FooKind` declared as private
...
36 | pub fn get_a_foo() -> FooKind {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ can't leak private type
Hi,
thanks for the very handy trait.
Would you consider providing a trait, e.g. something like this:
trait Kind {
type Kind;
fn kind() -> Self::Kind
}
This would enable building more generic / reusable code.
For example, in my particular case, I have functions to detect values of duplicated kinds.
Is it possible to use the generated enum in a different crate?
Would it be possible to copy over enum variant documentation to the EnumKind
?
It's not a huge issue by any means, but I feel it would make the derived enum feel a little more polished in a public API.
It could even just be an optional behaviour.
I'm getting the following warning when used with cargo clippy:
warning: this lifetime isn't used in the impl
--> src/options.rs:6:39
|
6 | #[derive(Clone, PartialEq, Eq, Debug, EnumKind)]
| ^^^^^^^^
|
= note:#[warn(clippy::extra_unused_lifetimes)]
on by default
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#extra_unused_lifetimes
= note: this warning originates in the derive macroEnumKind
(in Nightly builds, run with -Z macro-backtrace for more info)
I want to derive Default
for my custom enum. To do this, I'd like to write this:
#[derive(EnumKind)]
#[enum_kind(PainterKind, derive(Default))]
pub enum Painter {
#[default]
LinePainter,
CirclePainter,
}
But that #[default]
attribute is not on PainterKind
, but on Painter
. Can we add support for such derives?
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