mirror of https://github.com/rust-lang/rust
56 lines
1.8 KiB
Rust
56 lines
1.8 KiB
Rust
//@ aux-build:crate_a1.rs
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//@ aux-build:crate_a2.rs
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// Issue 22750
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// This tests the extra help message reported when a trait bound
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// is not met but the struct implements a trait with the same path.
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fn main() {
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let foo = {
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extern crate crate_a2 as a;
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a::Foo
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};
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let implements_no_traits = {
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extern crate crate_a2 as a;
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a::DoesNotImplementTrait
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};
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let other_variant_implements_mismatched_trait = {
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extern crate crate_a2 as a;
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a::ImplementsWrongTraitConditionally { _marker: std::marker::PhantomData::<isize> }
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};
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let other_variant_implements_correct_trait = {
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extern crate crate_a1 as a;
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a::ImplementsTraitForUsize { _marker: std::marker::PhantomData::<isize> }
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};
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{
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extern crate crate_a1 as a;
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a::try_foo(foo);
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//~^ ERROR E0277
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//~| trait impl with same name found
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//~| perhaps two different versions of crate `crate_a2`
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// We don't want to see the "version mismatch" help message here
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// because `implements_no_traits` has no impl for `Foo`
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a::try_foo(implements_no_traits);
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//~^ ERROR E0277
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// We don't want to see the "version mismatch" help message here
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// because `other_variant_implements_mismatched_trait`
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// does not have an impl for its `<isize>` variant,
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// only for its `<usize>` variant.
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a::try_foo(other_variant_implements_mismatched_trait);
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//~^ ERROR E0277
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// We don't want to see the "version mismatch" help message here
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// because `ImplementsTraitForUsize` only has
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// impls for the correct trait where the path is not misleading.
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a::try_foo(other_variant_implements_correct_trait);
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//~^ ERROR E0277
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//~| the trait `main::a::Bar` is implemented for `ImplementsTraitForUsize<usize>`
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}
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}
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