blob: 4d447c81ac9d2607695c2d587fbdd41ec0f8824c [file] [log] [blame]
//! This test verifies that a direct non-primitive cast from an enum to an integer type
//! is correctly disallowed, even when a `From` implementation exists for that enum.
//@ run-rustfix
#![allow(dead_code, unused_variables)]
enum NonNullary {
Nullary,
Other(isize),
}
impl From<NonNullary> for isize {
fn from(val: NonNullary) -> isize {
match val {
NonNullary::Nullary => 0,
NonNullary::Other(i) => i,
}
}
}
fn main() {
let v = NonNullary::Nullary;
let val = isize::from(v);
//~^ ERROR non-primitive cast: `NonNullary` as `isize` [E0605]
//~| HELP consider using the `From` trait instead
}