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from_repr.rs
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from_repr.rs
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use strum::FromRepr;
#[derive(Debug, FromRepr, PartialEq)]
#[repr(u8)]
enum Week {
Sunday,
Monday,
Tuesday,
Wednesday,
Thursday,
Friday = 4 + 3,
Saturday = 8,
}
#[test]
fn simple_test() {
assert_eq!(Week::from_repr(0), Some(Week::Sunday));
assert_eq!(Week::from_repr(1), Some(Week::Monday));
assert_eq!(Week::from_repr(6), None);
assert_eq!(Week::from_repr(7), Some(Week::Friday));
assert_eq!(Week::from_repr(8), Some(Week::Saturday));
assert_eq!(Week::from_repr(9), None);
}
#[rustversion::since(1.46)]
#[test]
fn const_test() {
// This is to test that it works in a const fn
const fn from_repr(discriminant: u8) -> Option<Week> {
Week::from_repr(discriminant)
}
assert_eq!(from_repr(0), Some(Week::Sunday));
assert_eq!(from_repr(1), Some(Week::Monday));
assert_eq!(from_repr(6), None);
assert_eq!(from_repr(7), Some(Week::Friday));
assert_eq!(from_repr(8), Some(Week::Saturday));
assert_eq!(from_repr(9), None);
}
#[test]
fn crate_module_path_test() {
pub mod nested {
pub mod module {
pub use strum;
}
}
#[derive(Debug, FromRepr, PartialEq)]
#[strum(crate = "nested::module::strum")]
enum Week {
Sunday,
Monday,
Tuesday,
Wednesday,
Thursday,
Friday,
Saturday,
}
assert_eq!(Week::from_repr(0), Some(Week::Sunday));
assert_eq!(Week::from_repr(6), Some(Week::Saturday));
assert_eq!(Week::from_repr(7), None);
}