cfg-or-panic 0.2.0

Replace function bodies with `unimplemented!()` when condition is not met.
Documentation 
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use cfg_or_panic::cfg_or_panic;

#[cfg_or_panic(foo)]
fn add(a: i32, b: i32) -> i32 {
    a + b
}

#[test]
#[cfg_attr(not(foo), should_panic)]
fn test() {
    assert_eq!(add(1, 2), 3);
}