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authorDan Aloni <alonid@gmail.com>2020-09-02 10:40:56 +0300
committerDan Aloni <alonid@gmail.com>2020-09-02 22:26:37 +0300
commit07e7823c01be1733df2480de19fbbe6b8e9384cf (patch)
tree9e4ff1075680201f9c72b58bf780638ef1fcede3 /src/test/ui/allocator
parent7b2deb562822112cc30d23958e7459564e2c6ef9 (diff)
downloadrust-07e7823c01be1733df2480de19fbbe6b8e9384cf.tar.gz
rust-07e7823c01be1733df2480de19fbbe6b8e9384cf.zip
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/allocator')
-rw-r--r--src/test/ui/allocator/not-an-allocator.stderr16
1 files changed, 8 insertions, 8 deletions
diff --git a/src/test/ui/allocator/not-an-allocator.stderr b/src/test/ui/allocator/not-an-allocator.stderr
index 0d52a23c1f3..c0ea8ff47e8 100644
--- a/src/test/ui/allocator/not-an-allocator.stderr
+++ b/src/test/ui/allocator/not-an-allocator.stderr
@@ -1,35 +1,35 @@
-error[E0277]: the trait bound `usize: std::alloc::GlobalAlloc` is not satisfied
+error[E0277]: the trait bound `usize: GlobalAlloc` is not satisfied
   --> $DIR/not-an-allocator.rs:2:1
    |
 LL | static A: usize = 0;
-   | ^^^^^^^^^^^^^^^^^^^^ the trait `std::alloc::GlobalAlloc` is not implemented for `usize`
+   | ^^^^^^^^^^^^^^^^^^^^ the trait `GlobalAlloc` is not implemented for `usize`
    |
    = note: required by `std::alloc::GlobalAlloc::alloc`
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)
 
-error[E0277]: the trait bound `usize: std::alloc::GlobalAlloc` is not satisfied
+error[E0277]: the trait bound `usize: GlobalAlloc` is not satisfied
   --> $DIR/not-an-allocator.rs:2:1
    |
 LL | static A: usize = 0;
-   | ^^^^^^^^^^^^^^^^^^^^ the trait `std::alloc::GlobalAlloc` is not implemented for `usize`
+   | ^^^^^^^^^^^^^^^^^^^^ the trait `GlobalAlloc` is not implemented for `usize`
    |
    = note: required by `std::alloc::GlobalAlloc::dealloc`
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)
 
-error[E0277]: the trait bound `usize: std::alloc::GlobalAlloc` is not satisfied
+error[E0277]: the trait bound `usize: GlobalAlloc` is not satisfied
   --> $DIR/not-an-allocator.rs:2:1
    |
 LL | static A: usize = 0;
-   | ^^^^^^^^^^^^^^^^^^^^ the trait `std::alloc::GlobalAlloc` is not implemented for `usize`
+   | ^^^^^^^^^^^^^^^^^^^^ the trait `GlobalAlloc` is not implemented for `usize`
    |
    = note: required by `std::alloc::GlobalAlloc::realloc`
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)
 
-error[E0277]: the trait bound `usize: std::alloc::GlobalAlloc` is not satisfied
+error[E0277]: the trait bound `usize: GlobalAlloc` is not satisfied
   --> $DIR/not-an-allocator.rs:2:1
    |
 LL | static A: usize = 0;
-   | ^^^^^^^^^^^^^^^^^^^^ the trait `std::alloc::GlobalAlloc` is not implemented for `usize`
+   | ^^^^^^^^^^^^^^^^^^^^ the trait `GlobalAlloc` is not implemented for `usize`
    |
    = note: required by `std::alloc::GlobalAlloc::alloc_zeroed`
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)