// Can't use unit struct as enum pattern
+// aux-build:empty-struct.rs
+
#![feature(rustc_attrs)]
// remove prior feature after warning cycle and promoting warnings to errors
#![feature(braced_empty_structs)]
-struct Empty1;
+extern crate empty_struct;
+use empty_struct::*;
+
+struct Empty2;
enum E {
- Empty2
+ Empty4
}
// remove attribute after warning cycle and promoting warnings to errors
#[rustc_error]
fn main() { //~ ERROR: compilation successful
- let e1 = Empty1;
- let e2 = E::Empty2;
+ let e2 = Empty2;
+ let e4 = E::Empty4;
+ let xe2 = XEmpty2;
+ let xe4 = XE::XEmpty4;
// Rejected by parser as yet
- // match e1 {
- // Empty1() => () // ERROR `Empty1` does not name a tuple variant or a tuple struct
+ // match e2 {
+ // Empty2() => () // ERROR `Empty2` does not name a tuple variant or a tuple struct
// }
- match e1 {
- Empty1(..) => () //~ WARN `Empty1` does not name a tuple variant or a tuple struct
+ // match xe2 {
+ // XEmpty2() => () // ERROR `XEmpty2` does not name a tuple variant or a tuple struct
+ // }
+ match e2 {
+ Empty2(..) => () //~ WARN `Empty2` does not name a tuple variant or a tuple struct
+ //~^ WARN hard error
+ }
+ match xe2 {
+ XEmpty2(..) => () //~ WARN `XEmpty2` does not name a tuple variant or a tuple struct
+ //~^ WARN hard error
}
// Rejected by parser as yet
- // match e2 {
- // E::Empty2() => () // ERROR `E::Empty2` does not name a tuple variant or a tuple struct
+ // match e4 {
+ // E::Empty4() => () // ERROR `E::Empty4` does not name a tuple variant or a tuple struct
// }
- match e2 {
- E::Empty2(..) => () //~ WARN `E::Empty2` does not name a tuple variant or a tuple struct
+ // match xe4 {
+ // XE::XEmpty4() => (), // ERROR `XE::XEmpty4` does not name a tuple variant or a tuple
+ // _ => {},
+ // }
+ match e4 {
+ E::Empty4(..) => () //~ WARN `E::Empty4` does not name a tuple variant or a tuple struct
+ //~^ WARN hard error
+ }
+ match xe4 {
+ XE::XEmpty4(..) => (), //~ WARN `XE::XEmpty4` does not name a tuple variant or a tuple
+ //~^ WARN hard error
+ _ => {},
}
}