rust/tests/ui/rfcs/rfc-2632-const-trait-impl/tilde-const-invalid-places.rs

#![feature(const_trait_impl)]

#[const_trait]
trait Trait {}

// Regression test for issue #90052.
fn non_const_function<T: ~const Trait>() {} //~ ERROR `~const` is not allowed

struct Struct<T: ~const Trait> { field: T } //~ ERROR `~const` is not allowed here
struct TupleStruct<T: ~const Trait>(T); //~ ERROR `~const` is not allowed here
struct UnitStruct<T: ~const Trait>; //~ ERROR `~const` is not allowed here

enum Enum<T: ~const Trait> { Variant(T) } //~ ERROR `~const` is not allowed here

union Union<T: ~const Trait> { field: T } //~ ERROR `~const` is not allowed here

type Type<T: ~const Trait> = T; //~ ERROR `~const` is not allowed here

const CONSTANT<T: ~const Trait>: () = (); //~ ERROR `~const` is not allowed here
//~^ ERROR generic const items are experimental

trait NonConstTrait {
    type Type<T: ~const Trait>: ~const Trait;
    //~^ ERROR `~const` is not allowed
    //~| ERROR `~const` is not allowed
    fn non_const_function<T: ~const Trait>(); //~ ERROR `~const` is not allowed
    const CONSTANT<T: ~const Trait>: (); //~ ERROR `~const` is not allowed
    //~^ ERROR generic const items are experimental
}

impl NonConstTrait for () {
    type Type<T: ~const Trait> = (); //~ ERROR `~const` is not allowed
    fn non_const_function<T: ~const Trait>() {} //~ ERROR `~const` is not allowed
    const CONSTANT<T: ~const Trait>: () = (); //~ ERROR `~const` is not allowed
    //~^ ERROR generic const items are experimental
}

struct Implementor;

impl Implementor {
    type Type<T: ~const Trait> = (); //~ ERROR `~const` is not allowed
    //~^ ERROR inherent associated types are unstable
    fn non_const_function<T: ~const Trait>() {} //~ ERROR `~const` is not allowed
    const CONSTANT<T: ~const Trait>: () = (); //~ ERROR `~const` is not allowed
    //~^ ERROR generic const items are experimental
}

// non-const traits
trait Child0: ~const Trait {} //~ ERROR `~const` is not allowed
trait Child1 where Self: ~const Trait {} //~ ERROR `~const` is not allowed

// non-const impl
impl<T: ~const Trait> Trait for T {} //~ ERROR `~const` is not allowed

fn main() {}