enum-tryfrom 0.2.1

Error types and traits for use with enum-tryfrom-derive
Documentation 
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#![feature(try_from)]
use std::convert::TryFrom;

#[macro_use]
extern crate enum_tryfrom_derive;
extern crate enum_tryfrom;

#[derive(PartialEq,Eq,Debug,TryFromPrimitive)]
#[TryFromPrimitiveType="u32"]
#[TryFromPrimitiveType="i32"]
enum Foo {
    FirstFoo = 1,
    SecondFoo,
    ThirdFoo,
}

#[test]
fn test_literal() {
    assert_eq!(Foo::try_from(1).unwrap(), Foo::FirstFoo);
}

#[test]
fn test_var() {
    let v : u32 = 2;
    assert_eq!(Foo::try_from(v).unwrap(), Foo::SecondFoo);
    let v : i32 = 2;
    assert_eq!(Foo::try_from(v).unwrap(), Foo::SecondFoo);
}

#[test]
fn test_out_of_bounds() {
    assert!(Foo::try_from(4).is_err());
}