rust/src/test/ui/suggestions/fn-or-tuple-struct-without-args.rs

fn foo(a: usize, b: usize) -> usize { a }

fn bar() -> usize { 42 }

struct S(usize, usize);
enum E {
    A(usize),
    B { a: usize },
}
struct V();

trait T {
    fn baz(x: usize, y: usize) -> usize { x }
    fn bat() -> usize { 42 }
}

fn main() {
    let _: usize = foo; //~ ERROR mismatched types
    let _: S = S; //~ ERROR mismatched types
    let _: usize = bar; //~ ERROR mismatched types
    let _: V = V; //~ ERROR mismatched types
    let _: usize = T::baz; //~ ERROR mismatched types
    let _: usize = T::bat; //~ ERROR mismatched types
    let _: E = E::A; //~ ERROR mismatched types
    let _: E = E::B; //~ ERROR expected value, found struct variant `E::B`
}