Trait nucleic_acid::ReprUsize [−] [src]

pub trait ReprUsize {
    fn from_usize(_: usize) -> Self;
    fn into_usize(self) -> usize;
}

A trait for representing types as usize (useful for enums).

Note that this should be implemented for types that need to be passed to BitsVec. This is implemented for integer types, bool and char by default.

use nucleic_acid::ReprUsize;

enum Foo {
    One,
    Two,
}

impl ReprUsize for Foo {
    fn into_usize(self) -> usize {
        match self {
            Foo::One => 0,
            Foo::Two => 1,
        }
    }

   fn from_usize(i: usize) -> Foo {
        match i {
            0 => Foo::One,
            1 => Foo::Two,
            _ => unimplemented!(),
        }
    }
}

Required Methods

Convert the value back from usize

Convert the value into an usize

Implementors