A Derive-Macro library that generates a companion tag-enum for any enum so that variants can be referred to without specifying fields.
Add this to your Cargo.toml:
[dependencies]
enum-tags = "0.1.0"
Then derive [Tag] for any enum you want to generate a companion tag-enum for.
```rust
enum MyEnum { A, B = 1024, C(char), D { x: i32, y: i32 }, } ```
The generated enum will look like this: ```rust
enum MyEnumTag { A, B = 1024, C, D, } ```
An impl for the [TaggedEnum] trait will also be generated to allow conversion from your enum type to the tag-enum.
The generated impl will look like this:
rust
impl ::enum_tags_traits::TaggedEnum for MyEnum {
type Tag = MyEnumTag;
fn tag(&self) -> Self::Tag {
match *self {
Self::A => Self::Tag::A,
Self::B => Self::Tag::B,
Self::C(_) => Self::Tag::C,
Self::D { x: _, y: _ } => Self::Tag::D,
}
}
}