diff options
Diffstat (limited to 'src/test/ui/associated-type-bounds/implied-region-constraints.rs')
-rw-r--r-- | src/test/ui/associated-type-bounds/implied-region-constraints.rs | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/src/test/ui/associated-type-bounds/implied-region-constraints.rs b/src/test/ui/associated-type-bounds/implied-region-constraints.rs new file mode 100644 index 000000000..38219da61 --- /dev/null +++ b/src/test/ui/associated-type-bounds/implied-region-constraints.rs @@ -0,0 +1,45 @@ +#![feature(associated_type_bounds)] + +trait Tr1 { type As1; } +trait Tr2 { type As2; } + +struct St<'a, 'b, T: Tr1<As1: Tr2>> { // `T: 'b` is *not* implied! + f0: &'a T, // `T: 'a` is implied. + f1: &'b <T::As1 as Tr2>::As2, // `<T::As1 as Tr2>::As2: 'a` is implied. +} + +fn _bad_st<'a, 'b, T>(x: St<'a, 'b, T>) +where + T: Tr1, + T::As1: Tr2, +{ + // This should fail because `T: 'b` is not implied from `WF(St<'a, 'b, T>)`. + let _failure_proves_not_implied_outlives_region_b: &'b T = &x.f0; + //~^ ERROR lifetime may not live long enough +} + +enum En7<'a, 'b, T> // `<T::As1 as Tr2>::As2: 'a` is implied. +where + T: Tr1, + T::As1: Tr2, +{ + V0(&'a T), + V1(&'b <T::As1 as Tr2>::As2), +} + +fn _bad_en7<'a, 'b, T>(x: En7<'a, 'b, T>) +where + T: Tr1, + T::As1: Tr2, +{ + match x { + En7::V0(x) => { + // Also fails for the same reason as above: + let _failure_proves_not_implied_outlives_region_b: &'b T = &x; + //~^ ERROR lifetime may not live long enough + }, + En7::V1(_) => {}, + } +} + +fn main() {} |