tests/ui/traits/default-method/rustc_must_implement_one_of_misuse.rs

#![feature(rustc_attrs)]

#[rustc_must_implement_one_of(a, b)]
//~^ ERROR function not found in this trait
//~| ERROR function not found in this trait
trait Tr0 {}

#[rustc_must_implement_one_of(a, b)]
//~^ ERROR function not found in this trait
trait Tr1 {
    fn a() {}
}

#[rustc_must_implement_one_of(a)]
//~^ ERROR malformed
trait Tr2 {
    fn a() {}
}

#[rustc_must_implement_one_of(a,)]
//~^ ERROR malformed
trait Tr2comma {
    fn a() {}
}

#[rustc_must_implement_one_of]
//~^ ERROR malformed `rustc_must_implement_one_of` attribute input
trait Tr3 {}

#[rustc_must_implement_one_of()]
//~^ ERROR malformed `rustc_must_implement_one_of` attribute input
trait Tempty {}

#[rustc_must_implement_one_of(,)]
//~^ ERROR expected a literal
trait Tcomma {}

#[rustc_must_implement_one_of(A, B)]
trait Tr4 {
    const A: u8 = 1; //~ ERROR not a function

    type B; //~ ERROR not a function
}

#[rustc_must_implement_one_of(a, b)]
trait Tr5 {
    fn a(); //~ ERROR function doesn't have a default implementation

    fn b(); //~ ERROR function doesn't have a default implementation
}

#[rustc_must_implement_one_of(a, b)]
trait TrOneDefault {
    fn a() {}

    fn b(); //~ ERROR function doesn't have a default implementation
}

#[rustc_must_implement_one_of(a, b, c)]
trait TrTwoDefaults {
    fn a() {}

    fn b() {}

    fn c(); //~ ERROR function doesn't have a default implementation
}

#[rustc_must_implement_one_of(abc, abc)]
//~^ ERROR the `rustc_must_implement_one_of` attribute cannot be used on functions
fn function() {}

#[rustc_must_implement_one_of(abc, xyz)]
//~^ ERROR the `rustc_must_implement_one_of` attribute cannot be used on structs
struct Struct {}

fn main() {}