https://github.com/lpenz/enumchar

Rust derive macro for enums where each variant is represented by a single char
https://github.com/lpenz/enumchar

Last synced: about 1 month ago
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Rust derive macro for enums where each variant is represented by a single char

• Host: GitHub
• URL: https://github.com/lpenz/enumchar
• Owner: lpenz
• License: mit
• Created: 2025-01-01T22:19:34.000Z (5 months ago)
• Default Branch: main
• Last Pushed: 2025-01-06T19:57:31.000Z (4 months ago)
• Last Synced: 2025-03-31T19:02:39.612Z (about 2 months ago)
• Language: Rust
• Size: 29.3 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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# enumchar

*enumchar* is a simple rust derive proc_macro for `enums` where each

variant corresponds to a `char`.

Example usage:

```rust

use enumchar::EnumChar;

#[derive(EnumChar)]

pub enum Cell {

    #[char('#')]

    Wall,

    #[char('.')]

    Empty,

}

```

The effect of the code above is the automatic `impl` of `TryFrom`,

`TryInto` and `std::fmt::Display`. It also implements

`Into` if all variants have a corresponding `char`, as we

can't return an error from that one.

I've been using this macro to parse all those 2D mazes in

[adventofcode](https://adventofcode.com/) - feel free to use it too.