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// check-compile
struct DisplayOnly;
impl std::fmt::Display for DisplayOnly {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
unimplemented!()
}
}
fn main() {
let x = Some(1);
println!("{x:?} {x} {x:?}");
//~^ ERROR: `Option<{integer}>` doesn't implement `std::fmt::Display`
println!("{x:?} {x} {x:?}", x = Some(1));
//~^ ERROR: `Option<{integer}>` doesn't implement `std::fmt::Display`
let x = DisplayOnly;
println!("{x} {x:?} {x}");
//~^ ERROR: `DisplayOnly` doesn't implement `Debug`
println!("{x} {x:?} {x}", x = DisplayOnly);
//~^ ERROR: `DisplayOnly` doesn't implement `Debug`
}
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