# Enum const value
[](https://crates.io/crates/enum_const_value)
[](https://github.com/jasperav/enum_const_value/actions)
A derive macro that will add const values for enum cases, even enums with associated types.
When dealing with an enum with associated types, the macro creates a new enum with the const values.
## Usage
```toml
[dependencies]
enum_const_value = "0.1.0"
```
Now in your project, add the following:
```rust
use enum_const_value::EnumConstValue;
```
and use the derive macro on an enum
```rust
#[derive(EnumConstValue)]
enum MyEnum {
SomeI32(i32),
SomeString(String)
}
```
Now, you can use use the `const_value()` method on an enum case like so:
```rust
#[test]
fn test_my_enum() {
assert_eq!(0, MyEnum::SomeI32(1).const_value());
assert_eq!(1, MyEnum::SomeString("MyString".to_string()).const_value());
assert_eq!(0, MyEnumConstValue::SomeI32.value());
assert_eq!(1, MyEnumConstValue::SomeString.value());
}
```
## TODO
- Custom enum case values (can be done by adding attributes)
- Custom derived enum name (is currently always $ENUMNAME$ConstValue)
#### License
<sup>
Licensed under either of <a href="LICENSE-APACHE">Apache License, Version
2.0</a> or <a href="LICENSE-MIT">MIT license</a> at your option.
</sup>
<br>
<sub>
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.
</sub>