rust/tests/ui/cast/issue-88621.rs

#[repr(u8)]
enum Kind2 {
    Foo() = 1,
    Bar{} = 2,
    Baz = 3,
}

fn main() {
    let _ = Kind2::Foo() as u8;
    //~^ ERROR non-primitive cast
}
Disallow non-c-like but "fieldless" ADTs from being casted to integer... ... if they use arbitrary enum discriminant. Code like ```rust enum Enum { Foo = 1, Bar(), Baz{} } ``` seems to be unintentionally allowed so we couldn't disallow them now, but we could disallow them if arbitrary enum discriminant is used before 1.56 hits stable. 2021-09-24 20:58:25 +00:00			`#[repr(u8)]`
			`enum Kind2 {`
			`Foo() = 1,`
			`Bar{} = 2,`
			`Baz = 3,`
			`}`

			`fn main() {`
			`let _ = Kind2::Foo() as u8;`
			`//~^ ERROR non-primitive cast`
			`}`