mirror of https://github.com/rust-lang/rust
104 lines
3.0 KiB
Rust
104 lines
3.0 KiB
Rust
#![feature(c_variadic)]
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#![feature(fn_delegation)]
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#![allow(incomplete_features)]
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mod generics {
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trait GenericTrait<T> {
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fn bar(&self, x: T) -> T { x }
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fn bar1() {}
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}
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trait Trait {
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fn foo(&self, x: i32) -> i32 { x }
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fn foo1<'a>(&self, x: &'a i32) -> &'a i32 { x }
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fn foo2<T>(&self, x: T) -> T { x }
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fn foo3<'a: 'a>(_: &'a u32) {}
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reuse GenericTrait::bar;
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//~^ ERROR delegation with early bound generics is not supported yet
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reuse GenericTrait::bar1;
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//~^ ERROR delegation with early bound generics is not supported yet
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}
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struct F;
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impl Trait for F {}
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impl<T> GenericTrait<T> for F {}
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struct S(F);
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impl<T> GenericTrait<T> for S {
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reuse <F as GenericTrait<T>>::bar { &self.0 }
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//~^ ERROR delegation with early bound generics is not supported yet
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reuse GenericTrait::<T>::bar1;
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//~^ ERROR delegation with early bound generics is not supported yet
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}
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impl GenericTrait<()> for () {
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reuse GenericTrait::bar { &F }
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//~^ ERROR delegation with early bound generics is not supported yet
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reuse GenericTrait::bar1;
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//~^ ERROR delegation with early bound generics is not supported yet
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}
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impl Trait for &S {
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reuse Trait::foo;
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//~^ ERROR delegation with early bound generics is not supported yet
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}
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impl Trait for S {
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reuse Trait::foo1 { &self.0 }
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reuse Trait::foo2 { &self.0 }
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//~^ ERROR delegation with early bound generics is not supported yet
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//~| ERROR method `foo2` has 0 type parameters but its trait declaration has 1 type parameter
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reuse <F as Trait>::foo3;
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//~^ ERROR delegation with early bound generics is not supported yet
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//~| ERROR lifetime parameters or bounds on method `foo3` do not match the trait declaration
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}
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struct GenericS<T>(T);
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impl<T> Trait for GenericS<T> {
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reuse Trait::foo { &self.0 }
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//~^ ERROR delegation with early bound generics is not supported yet
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}
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}
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mod opaque {
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trait Trait {}
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impl Trait for () {}
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mod to_reuse {
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use super::Trait;
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pub fn opaque_arg(_: impl Trait) -> i32 { 0 }
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pub fn opaque_ret() -> impl Trait { unimplemented!() }
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}
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reuse to_reuse::opaque_arg;
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//~^ ERROR delegation with early bound generics is not supported yet
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trait ToReuse {
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fn opaque_ret() -> impl Trait { unimplemented!() }
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}
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// FIXME: Inherited `impl Trait`s create query cycles when used inside trait impls.
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impl ToReuse for u8 {
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reuse to_reuse::opaque_ret; //~ ERROR cycle detected when computing type
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}
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impl ToReuse for u16 {
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reuse ToReuse::opaque_ret; //~ ERROR cycle detected when computing type
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}
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}
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mod recursive {
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mod to_reuse1 {
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pub mod to_reuse2 {
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pub fn foo() {}
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}
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pub reuse to_reuse2::foo;
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}
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reuse to_reuse1::foo;
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//~^ ERROR recursive delegation is not supported yet
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}
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fn main() {}
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