Crate ordinal_map

Expand description

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

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<ErrorCategory, u64> = OrdinalTotalMap::default();

for error in &errors {
    let category = classify_error(error);
    error_counts[&category] += 1;
}

Modules§

map: Constant time lookup map implementations where keys implement the Ordinal trait.
set: Constant time lookup set implementations where entries implement the Ordinal trait.

Structs§

OrdinalValues: Iterator over Ordinal values.

Traits§

Ordinal: Two-way map from a type to usize range from 0..ORDINAL_SIZE.

Derive Macros§