07e7823c01
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.
9 lines
255 B
Rust
9 lines
255 B
Rust
// Test that an object type `Box<Foo>` is not considered to implement the
|
|
// trait `Foo`. Issue #5087.
|
|
|
|
trait Foo {}
|
|
fn take_foo<F:Foo>(f: F) {}
|
|
fn take_object(f: Box<dyn Foo>) { take_foo(f); }
|
|
//~^ ERROR `Box<dyn Foo>: Foo` is not satisfied
|
|
fn main() {}
|