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When printing impl headers in a diagnostic, the compiler has to account for `?Sized` implying `MetaSized` and new `MetaSized` and `PointeeSized` bounds.
27 lines
1.0 KiB
Rust
27 lines
1.0 KiB
Rust
//@ aux-build:pretty-print-dep.rs
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//@ compile-flags: --crate-type=lib
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extern crate pretty_print_dep;
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use pretty_print_dep::{SizedTr, NegSizedTr, MetaSizedTr, PointeeSizedTr};
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// Test that printing the sizedness trait bounds in the conflicting impl error without enabling
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// `sized_hierarchy` will continue to print `?Sized`, even if the dependency is compiled with
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// `sized_hierarchy`.
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//
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// It isn't possible to write a test that matches the multiline note containing the important
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// diagnostic output being tested - so check the stderr changes carefully!
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struct X<T>(T);
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impl<T: Sized> SizedTr for X<T> {}
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//~^ ERROR conflicting implementations of trait `SizedTr` for type `X<_>`
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impl<T: ?Sized> NegSizedTr for X<T> {}
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//~^ ERROR conflicting implementations of trait `NegSizedTr` for type `X<_>`
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impl<T: ?Sized> MetaSizedTr for X<T> {}
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//~^ ERROR conflicting implementations of trait `MetaSizedTr` for type `X<_>`
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impl<T: ?Sized> PointeeSizedTr for X<T> {}
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//~^ ERROR conflicting implementations of trait `PointeeSizedTr` for type `X<_>`
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