diff options
Diffstat (limited to 'src/test/ui/traits/bound/same-crate-name.rs')
-rw-r--r-- | src/test/ui/traits/bound/same-crate-name.rs | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/src/test/ui/traits/bound/same-crate-name.rs b/src/test/ui/traits/bound/same-crate-name.rs new file mode 100644 index 000000000..8d646a414 --- /dev/null +++ b/src/test/ui/traits/bound/same-crate-name.rs @@ -0,0 +1,55 @@ +// aux-build:crate_a1.rs +// aux-build:crate_a2.rs + +// Issue 22750 +// This tests the extra help message reported when a trait bound +// is not met but the struct implements a trait with the same path. + +fn main() { + let foo = { + extern crate crate_a2 as a; + a::Foo + }; + + let implements_no_traits = { + extern crate crate_a2 as a; + a::DoesNotImplementTrait + }; + + let other_variant_implements_mismatched_trait = { + extern crate crate_a2 as a; + a::ImplementsWrongTraitConditionally { _marker: std::marker::PhantomData::<isize> } + }; + + let other_variant_implements_correct_trait = { + extern crate crate_a1 as a; + a::ImplementsTraitForUsize { _marker: std::marker::PhantomData::<isize> } + }; + + { + extern crate crate_a1 as a; + a::try_foo(foo); + //~^ ERROR E0277 + //~| trait impl with same name found + //~| perhaps two different versions of crate `crate_a2` + + // We don't want to see the "version mismatch" help message here + // because `implements_no_traits` has no impl for `Foo` + a::try_foo(implements_no_traits); + //~^ ERROR E0277 + + // We don't want to see the "version mismatch" help message here + // because `other_variant_implements_mismatched_trait` + // does not have an impl for its `<isize>` variant, + // only for its `<usize>` variant. + a::try_foo(other_variant_implements_mismatched_trait); + //~^ ERROR E0277 + + // We don't want to see the "version mismatch" help message here + // because `ImplementsTraitForUsize` only has + // impls for the correct trait where the path is not misleading. + a::try_foo(other_variant_implements_correct_trait); + //~^ ERROR E0277 + //~| the trait `main::a::Bar` is implemented for `ImplementsTraitForUsize<usize>` + } +} |