2 releases
0.1.1 | Sep 6, 2023 |
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0.1.0 | Sep 6, 2023 |
#1838 in Data structures
19KB
390 lines
variant-map
Enum variants stored in Maps.
Provides different kinds of map-equivalent types to store enum variants into. As those data structures are maps, they store one value of each variant. All Maps are serde::Serialize-able and serde::Deserialize-able
Those maps can be generated easily using the derive macros from variant_map_derive.
variant_map_derive provides a derive macro for a StructMap
(a struct type with a field per enum variant).
variant_map_derive can be included using the derive
feature of variant_map
This crate also provide simple macros to lighten the syntax with the macros
feature.
Example
use variant_map_derive::VariantStore;
#[derive(VariantStore)]
enum MyEnum {
A,
B(i32),
}
fn main() {
use variant_map::{as_key, as_map};
let mut map = <as_map!(MyEnum)>::default();
let _: &MyEnum = map.get(&<as_key!(MyEnum)>::A).unwrap();
let _: &MyEnum = map.get(&MyEnumKey::A).unwrap();
map[&MyEnumKey::B] = MyEnum::B(69);
}
For more customizability of the Map check out the [variant_map_derive] crate documentation
For more detailed examples check out the example project on this crates' repo
Dependencies
~0.4–1.1MB
~26K SLoC