Crate one_of

Macro to represent a type that can be converted either From or Into the given types

This crate only works on the nightly version of Rust

Usage

use one_of::one_of;

// either `u32` or `char`
let x: one_of!(u32, char) = 42.into();
assert_eq!(Some(42u32), x.into());
assert_eq!(Option::<char>::None, x.into());

// some type of integer
let x: one_of!(i8, i16, i32, i64, u8, u16, u32, u64) = 42.into();
assert_eq!(Option::<i8>::None, x.into());
assert_eq!(Option::<i16>::None, x.into());
assert_eq!(Some(42i32), x.into());
assert_eq!(Option::<i64>::None, x.into());
assert_eq!(Option::<u8>::None, x.into());
assert_eq!(Option::<u16>::None, x.into());
assert_eq!(Option::<u32>::None, x.into());
assert_eq!(Option::<u64>::None, x.into());

Changelog

See CHANGELOG.md

Macros

one_of

Represents a type that can be converted either From or Into the given types