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.
17 lines
534 B
Rust
17 lines
534 B
Rust
#![allow(warnings)]
|
|
|
|
struct Bar;
|
|
|
|
// This function would compile with the feature gate, and tests that it is suggested.
|
|
fn foo() {
|
|
let arr: [Option<String>; 2] = [None::<String>; 2];
|
|
//~^ ERROR the trait bound `Option<String>: Copy` is not satisfied [E0277]
|
|
}
|
|
|
|
// This function would not compile with the feature gate, and tests that it is not suggested.
|
|
fn bar() {
|
|
let arr: [Option<String>; 2] = [Some("foo".to_string()); 2];
|
|
//~^ ERROR the trait bound `Option<String>: Copy` is not satisfied [E0277]
|
|
}
|
|
|
|
fn main() {}
|