Sourced from strum_macros's changelog.
0.26.1
- #325: use
coreinstead ofstdin VariantArray.0.26.0
Breaking Changes
- The
EnumVariantNamesmacro has been renamedVariantNames. The deprecation warning should steer you in the right direction for fixing the warning.- The Iterator struct generated by EnumIter now has new bounds on it. This shouldn't break code unless you manually added the implementation in your code.
Displaynow supports format strings using named fields in the enum variant. This should be a no-op for most code. However, if you were outputting a string like"Hello {field}", this will now be interpretted as a format string.- EnumDiscriminant now inherits the repr and discriminant values from your main enum. This makes the discriminant type closer to a mirror of the original and that's always the goal.
New features
The
VariantArraymacro has been added. This macro adds an associated constantVARIANTSto your enum. The constant is a&'static [Self]slice so that you can access all the variants of your enum. This only works on enums that only have unit variants.use strum::VariantArray;#[derive(Debug, VariantArray)] enum Color { Red, Blue, Green, }
fn main() { println!("{:?}", Color::VARIANTS); // prints: ["Red", "Blue", "Green"] }
The
EnumTablemacro has been experimentally added. This macro adds a new type that stores an item for each variant of the enum. This is useful for storing a value for each variant of an enum. This is an experimental feature because I'm not convinced the current api surface area is correct.use strum::EnumTable;#[derive(Copy, Clone, Debug, EnumTable)] enum Color { Red, Blue, Green,
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