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| author | Dan Aloni <alonid@gmail.com> | 2020-09-02 10:40:56 +0300 |
|---|---|---|
| committer | Dan Aloni <alonid@gmail.com> | 2020-09-02 22:26:37 +0300 |
| commit | 07e7823c01be1733df2480de19fbbe6b8e9384cf (patch) | |
| tree | 9e4ff1075680201f9c72b58bf780638ef1fcede3 /src/test/ui/specialization/defaultimpl | |
| parent | 7b2deb562822112cc30d23958e7459564e2c6ef9 (diff) | |
pretty: trim paths of unique symbols
If a symbol name can only be imported from one place for a type, and as long as it was not glob-imported anywhere in the current crate, we can trim its printed path and print only the name. This has wide implications on error messages with types, for example, shortening `std::vec::Vec` to just `Vec`, as long as there is no other `Vec` importable anywhere. This adds a new '-Z trim-diagnostic-paths=false' option to control this feature. On the good path, with no diagnosis printed, we should try to avoid issuing this query, so we need to prevent trimmed_def_paths query on several cases. This change also relies on a previous commit that differentiates between `Debug` and `Display` on various rustc types, where the latter is trimmed and presented to the user and the former is not.
Diffstat (limited to 'src/test/ui/specialization/defaultimpl')
| -rw-r--r-- | src/test/ui/specialization/defaultimpl/specialization-wfcheck.rs | 2 | ||||
| -rw-r--r-- | src/test/ui/specialization/defaultimpl/specialization-wfcheck.stderr | 8 |
2 files changed, 5 insertions, 5 deletions
diff --git a/src/test/ui/specialization/defaultimpl/specialization-wfcheck.rs b/src/test/ui/specialization/defaultimpl/specialization-wfcheck.rs index afd634725e3..eb18d6eaac4 100644 --- a/src/test/ui/specialization/defaultimpl/specialization-wfcheck.rs +++ b/src/test/ui/specialization/defaultimpl/specialization-wfcheck.rs @@ -5,6 +5,6 @@ trait Foo<'a, T: Eq + 'a> { } default impl<U> Foo<'static, U> for () {} -//~^ ERROR the trait bound `U: std::cmp::Eq` is not satisfied +//~^ ERROR the trait bound `U: Eq` is not satisfied fn main(){} diff --git a/src/test/ui/specialization/defaultimpl/specialization-wfcheck.stderr b/src/test/ui/specialization/defaultimpl/specialization-wfcheck.stderr index d45825651a8..dcac310ed06 100644 --- a/src/test/ui/specialization/defaultimpl/specialization-wfcheck.stderr +++ b/src/test/ui/specialization/defaultimpl/specialization-wfcheck.stderr @@ -7,19 +7,19 @@ LL | #![feature(specialization)] = note: `#[warn(incomplete_features)]` on by default = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information -error[E0277]: the trait bound `U: std::cmp::Eq` is not satisfied +error[E0277]: the trait bound `U: Eq` is not satisfied --> $DIR/specialization-wfcheck.rs:7:17 | LL | trait Foo<'a, T: Eq + 'a> { } | -- required by this bound in `Foo` LL | LL | default impl<U> Foo<'static, U> for () {} - | ^^^^^^^^^^^^^^^ the trait `std::cmp::Eq` is not implemented for `U` + | ^^^^^^^^^^^^^^^ the trait `Eq` is not implemented for `U` | help: consider restricting type parameter `U` | -LL | default impl<U: std::cmp::Eq> Foo<'static, U> for () {} - | ^^^^^^^^^^^^^^ +LL | default impl<U: Eq> Foo<'static, U> for () {} + | ^^^^ error: aborting due to previous error; 1 warning emitted |