https://github.com/stepancheg/ordinal-map

Map types to integers
https://github.com/stepancheg/ordinal-map

Last synced: about 1 year ago
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Map types to integers

• Host: GitHub
• URL: https://github.com/stepancheg/ordinal-map
• Owner: stepancheg
• Created: 2024-06-22T21:28:09.000Z (almost 2 years ago)
• Default Branch: master
• Last Pushed: 2024-06-24T01:50:57.000Z (almost 2 years ago)
• Last Synced: 2025-03-25T04:28:48.546Z (about 1 year ago)
• Language: Rust
• Size: 86.9 KB
• Stars: 2
• Watchers: 2
• Forks: 0
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

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README

          
# `Ordinal` types and collections

The library provides `Ordinal` trait to map types to `usize` values,

proc-macro to derive `Ordinal` trait for structs and enums,

and `map` and `set` implementations

that use these types as keys efficiently.

## Example

```rust

use ordinal_map::map::total::OrdinalTotalMap;

#[derive(ordinal_map::Ordinal)]

enum ErrorCategory {

    Network,

    Disk,

    Logic,

}

fn classify_error(error: &str) -> ErrorCategory {

    // ...

}

let mut error_counts: OrdinalTotalMap = OrdinalTotalMap::default();

for error in &errors {

    let category = classify_error(error);

    error_counts[category] += 1;

}

```