deriveisenum_variant

derive_is_enum_variant

Stop writing pub is_whatever(&self) -> bool for your enums by hand -- it's a pain! Just #[derive(is_enum_variant)] instead!

Usage

Add derive_is_enum_variant to your crate's Cargo.toml:

toml [dependencies] derive_is_enum_variant = "<insert-latest-version-here>"

And then add #[derive(is_enum_variant)] to your enum definitions:

```rust

[macro_use]

extern crate deriveisenum_variant;

[derive(isenumvariant)]

pub enum Pet { Doggo, Kitteh, }

fn main() { let pet = Pet::Doggo;

assert!(pet.is_doggo());
assert!(!pet.is_kitteh());

} ```

Customizing Predicate Names

By default, the predicates are named is_snake_case_of_variant_name. You can use any name you want instead with #[is_enum_variant(name = "..")]:

```rust

[derive(isenumvariant)]

pub enum Pet { #[isenumvariant(name = "isrealgood_boy")] Doggo, Kitteh, }

let pet = Pet::Doggo; assert!(pet.isrealgood_boy()); ```

Skipping Predicates for Certain Variants

If you don't want to generate a predicate for a certain variant, you can use #[is_enum_variant(skip)]:

```rust

[derive(isenumvariant)]

pub enum Errors { Io(::std::io::Error),

#[doc(hidden)]
#[is_enum_variant(skip)]
__NonExhaustive,

}

```

License

Licensed under either of

• Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

See CONTRIBUTING.md for hacking!

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.

License: Apache-2.0/MIT