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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/impl-trait/nested-rpit-hrtb.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/impl-trait/nested-rpit-hrtb.rs')
-rw-r--r-- | src/test/ui/impl-trait/nested-rpit-hrtb.rs | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/src/test/ui/impl-trait/nested-rpit-hrtb.rs b/src/test/ui/impl-trait/nested-rpit-hrtb.rs new file mode 100644 index 000000000..abf6a7e95 --- /dev/null +++ b/src/test/ui/impl-trait/nested-rpit-hrtb.rs @@ -0,0 +1,64 @@ +// Test the interaction between rested RPIT and HRTB. + +trait Foo<'a> { + type Assoc; +} + +impl Foo<'_> for () { + type Assoc = (); +} + +// Alternative version of `Foo` whose impl uses `'a`. +trait Bar<'a> { + type Assoc; +} + +impl<'a> Bar<'a> for () { + type Assoc = &'a (); +} + +trait Qux<'a> {} + +impl Qux<'_> for () {} + +// This is not supported. +fn one_hrtb_outlives() -> impl for<'a> Foo<'a, Assoc = impl Sized + 'a> {} +//~^ ERROR higher kinded lifetime bounds on nested opaque types are not supported yet + +// This is not supported. +fn one_hrtb_trait_param() -> impl for<'a> Foo<'a, Assoc = impl Qux<'a>> {} +//~^ ERROR higher kinded lifetime bounds on nested opaque types are not supported yet + +fn one_hrtb_outlives_uses() -> impl for<'a> Bar<'a, Assoc = impl Sized + 'a> {} +//~^ ERROR higher kinded lifetime bounds on nested opaque types are not supported yet + +fn one_hrtb_trait_param_uses() -> impl for<'a> Bar<'a, Assoc = impl Qux<'a>> {} +//~^ ERROR higher kinded lifetime bounds on nested opaque types are not supported yet + +// This should pass. +fn one_hrtb_mention_fn_trait_param<'b>() -> impl for<'a> Foo<'a, Assoc = impl Qux<'b>> {} + +// This should pass. +fn one_hrtb_mention_fn_outlives<'b>() -> impl for<'a> Foo<'a, Assoc = impl Sized + 'b> {} + +// This should pass. +fn one_hrtb_mention_fn_trait_param_uses<'b>() -> impl for<'a> Bar<'a, Assoc = impl Qux<'b>> {} + +// This should pass. +fn one_hrtb_mention_fn_outlives_uses<'b>() -> impl for<'a> Bar<'a, Assoc = impl Sized + 'b> {} + +// This should pass. +fn two_htrb_trait_param() -> impl for<'a> Foo<'a, Assoc = impl for<'b> Qux<'b>> {} + +// `'b` is not in scope for the outlives bound. +fn two_htrb_outlives() -> impl for<'a> Foo<'a, Assoc = impl for<'b> Sized + 'b> {} +//~^ ERROR use of undeclared lifetime name `'b` [E0261] + +// This should pass. +fn two_htrb_trait_param_uses() -> impl for<'a> Bar<'a, Assoc = impl for<'b> Qux<'b>> {} + +// `'b` is not in scope for the outlives bound. +fn two_htrb_outlives_uses() -> impl for<'a> Bar<'a, Assoc = impl for<'b> Sized + 'b> {} +//~^ ERROR use of undeclared lifetime name `'b` [E0261] + +fn main() {} |