try_enum 0.1.0

match enum
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#[macro_use]
extern crate try_enum;

#[test]
fn test_try_enum() {
    #[derive(Eq,PartialEq)]
    enum A<'a> {
        Bar(i32),
        Foo(&'a str),
    }
    let a=A::Bar(12);
    assert_eq!(try_enum!(a,A::Bar),Some(12));
    assert_eq!(try_enum!(a,A::Foo),None);
    let a_foo=A::Foo("123");
    assert_eq!(try_enum!(a_foo,A::Foo),Some("123"));
    #[derive(Eq,PartialEq)]
    enum B<'a> {
        Bar{a:A<'a>,b:i32},
        Foo(&'a str),
    }
    let b=B::Bar{a:A::Bar(12),b:14};
    assert_eq!(try_enum!(&b,B::Bar[a],A::Bar),Some(&12));
    assert_eq!(try_enum!(b,B::Foo),None);
    let b_foo=B::Foo("123");
    assert_eq!(try_enum!(b_foo,B::Foo),Some("123"));
}