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Diffstat (limited to 'tests/ui/associated-type-bounds/bad-bounds-on-assoc-in-trait.rs')
-rw-r--r-- | tests/ui/associated-type-bounds/bad-bounds-on-assoc-in-trait.rs | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/tests/ui/associated-type-bounds/bad-bounds-on-assoc-in-trait.rs b/tests/ui/associated-type-bounds/bad-bounds-on-assoc-in-trait.rs new file mode 100644 index 000000000..d180de9be --- /dev/null +++ b/tests/ui/associated-type-bounds/bad-bounds-on-assoc-in-trait.rs @@ -0,0 +1,67 @@ +// NOTE: rustc cannot currently handle bounds of the form `for<'a> <Foo as Bar<'a>>::Assoc: Baz`. +// This should hopefully be fixed with Chalk. + +#![feature(associated_type_bounds)] + +use std::fmt::Debug; +use std::iter::Once; + +trait Lam<Binder> { + type App; +} + +#[derive(Clone)] +struct L1; +impl<'a> Lam<&'a u8> for L1 { + type App = u8; +} + +#[derive(Clone)] +struct L2; +impl<'a, 'b> Lam<&'a &'b u8> for L2 { + type App = u8; +} + +trait Case1 { + type C: Clone + Iterator<Item: Send + Iterator<Item: for<'a> Lam<&'a u8, App: Debug>> + Sync>; + //~^ ERROR `<<Self as Case1>::C as Iterator>::Item` is not an iterator + //~| ERROR `<<Self as Case1>::C as Iterator>::Item` cannot be sent between threads safely + //~| ERROR `<<Self as Case1>::C as Iterator>::Item` cannot be shared between threads safely +} + +pub struct S1; +impl Case1 for S1 { + type C = Once<Once<L1>>; +} + +fn assume_case1<T: Case1>() { + fn assert_a<_0, A>() + where + A: Iterator<Item = _0>, + _0: Debug, + { + } + assert_a::<_, T::A>(); + + fn assert_b<_0, B>() + where + B: Iterator<Item = _0>, + _0: 'static, + { + } + assert_b::<_, T::B>(); + + fn assert_c<_0, _1, _2, C>() + where + C: Clone + Iterator<Item = _2>, + _2: Send + Iterator<Item = _1>, + _1: for<'a> Lam<&'a u8, App = _0>, + _0: Debug, + { + } + assert_c::<_, _, _, T::C>(); +} + +fn main() { + assume_case1(S1); +} |