rust/src/test/ui/pattern/usefulness/issue-80501-or-pat-and-macro.rs

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2021-01-02 16:38:18 -06:00
#![deny(unreachable_patterns)]
//~^ NOTE: lint level is defined here
pub enum TypeCtor {
Slice,
Array,
}
pub struct ApplicationTy(TypeCtor);
macro_rules! ty_app {
($ctor:pat) => {
ApplicationTy($ctor) //~ ERROR unreachable pattern
};
}
fn _foo(ty: ApplicationTy) {
match ty {
ty_app!(TypeCtor::Array) | ty_app!(TypeCtor::Slice) => {} //~ NOTE: in this expansion
}
// same as above, with the macro expanded
match ty {
ApplicationTy(TypeCtor::Array) | ApplicationTy(TypeCtor::Slice) => {}
}
}
fn main() {}