mirror of
https://github.com/danog/strum.git
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aeaa19ad86
* Add EnumConstIndex
* Get working with discriminants
* Remove unused/(unneeded?) features
* Rename to EnumIndex and index(..). Make const_index conditional
* Get repr(..) working
* Fix issue to support rust 1.32
* Switch from VARIANT# to {ENUM}_{VARIANT} for variant constant names
* Expose constants as part of implementation
* Add discriminant error messages. Cargo fmt my code
* Add rustversion to make compilation conditional on 1.46
* Handle expr discriminants
* Fix generics handling
* Make constants always available. No need to only expose them when const_index is defined
* Change to FromDiscriminant. Only output a single function
* Don't make constants accessible
* Make rustversion a dev dependency in strum-tests due to upstream change
* Cleanup doc tests for const
* Rename to FromRepr/from_repr
64 lines
1.5 KiB
Rust
64 lines
1.5 KiB
Rust
use strum::FromRepr;
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#[derive(Debug, FromRepr, PartialEq)]
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#[repr(u8)]
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enum Week {
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Sunday,
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Monday,
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Tuesday,
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Wednesday,
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Thursday,
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Friday = 4 + 3,
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Saturday = 8,
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}
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#[test]
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fn simple_test() {
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assert_eq!(Week::from_repr(0), Some(Week::Sunday));
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assert_eq!(Week::from_repr(1), Some(Week::Monday));
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assert_eq!(Week::from_repr(6), None);
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assert_eq!(Week::from_repr(7), Some(Week::Friday));
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assert_eq!(Week::from_repr(8), Some(Week::Saturday));
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assert_eq!(Week::from_repr(9), None);
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}
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#[rustversion::since(1.46)]
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#[test]
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fn const_test() {
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// This is to test that it works in a const fn
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const fn from_repr(discriminant: u8) -> Option<Week> {
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Week::from_repr(discriminant)
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}
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assert_eq!(from_repr(0), Some(Week::Sunday));
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assert_eq!(from_repr(1), Some(Week::Monday));
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assert_eq!(from_repr(6), None);
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assert_eq!(from_repr(7), Some(Week::Friday));
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assert_eq!(from_repr(8), Some(Week::Saturday));
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assert_eq!(from_repr(9), None);
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}
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#[test]
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fn crate_module_path_test() {
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pub mod nested {
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pub mod module {
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pub use strum;
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}
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}
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#[derive(Debug, FromRepr, PartialEq)]
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#[strum(crate = "nested::module::strum")]
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enum Week {
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Sunday,
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Monday,
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Tuesday,
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Wednesday,
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Thursday,
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Friday,
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Saturday,
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}
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assert_eq!(Week::from_repr(0), Some(Week::Sunday));
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assert_eq!(Week::from_repr(6), Some(Week::Saturday));
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assert_eq!(Week::from_repr(7), None);
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}
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