1 stable release
1.0.0 | Oct 27, 2024 |
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#58 in No standard library
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10KB
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Type-erased Discriminant
This crate provides a Discriminant
type that behaves like
core::mem::Discriminant<T>
but without the generic type parameter T
. With
this, we can build collections such as HashSet that contain discriminants from a
mixture of different enum types.
use erased_discriminant::Discriminant;
use std::collections::HashSet;
enum Enum {
A(i32),
B,
}
enum DifferentEnum {
A,
}
let mut set = HashSet::new();
set.insert(Discriminant::of(&Enum::A(99)));
set.insert(Discriminant::of(&Enum::B));
set.insert(Discriminant::of(&DifferentEnum::A));
assert_eq!(set.len(), 3);
License
Licensed under either of Apache License, Version 2.0 or MIT license at your option.Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in this crate by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.
Dependencies
~13KB