https://github.com/khrynczenko/tagname

derive macro that gives you a name of a current tag inside a variant as a string
https://github.com/khrynczenko/tagname

rust rust-crate rust-lang rust-language rust-library

Last synced: about 1 month ago
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derive macro that gives you a name of a current tag inside a variant as a string

• Host: GitHub
• URL: https://github.com/khrynczenko/tagname
• Owner: khrynczenko
• License: mit
• Created: 2022-10-17T19:20:43.000Z (about 2 years ago)
• Default Branch: master
• Last Pushed: 2023-01-10T16:47:31.000Z (almost 2 years ago)
• Last Synced: 2024-03-15T06:46:26.996Z (8 months ago)
• Topics: rust, rust-crate, rust-lang, rust-language, rust-library
• Language: Rust
• Homepage:
• Size: 38.1 KB
• Stars: 4
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE

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README

        
tagname

=============

[](https://github.com/khrynczenko/tagname)

[](https://crates.io/crates/tagname)

[](https://docs.rs/tagname)

[](https://github.com/khrynczenko/tagname/actions?query=branch%3Amaster)

This library exports a trait called `TagName` that exposes a

`tag_name` method which is used for retrieving a name (tag) of a currently hold variant within an `enum` value.

More importantly, together with `TagName` trait comes a `derive(TagName)`

macro that can automatically implement the trait.

```rust

use tagname::TagName;

#[derive(TagName)]

enum MyTaggedUnion {

    #[tag(case = "lower")]

    Yes,

    #[tag(case = "upper")]

    No,

    Maybe(usize),

}

#[test]

fn return_correct_tag_names() {

    let v1 = MyTaggedUnion::Yes;

    let v2 = MyTaggedUnion::No;

    let v3 = MyTaggedUnion::Maybe(1);

    assert_eq!(v1.tag_name(), "yes");

    assert_eq!(v2.tag_name(), "NO");

    assert_eq!(v3.tag_name(), "Maybe");

}

```