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.
21 lines
281 B
Rust
21 lines
281 B
Rust
extern crate core;
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use core::ops::Drop;
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trait Bar {}
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struct G<T: ?Sized> {
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_ptr: *const T
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}
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impl<T> Drop for G<T> {
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//~^ ERROR `Drop` impl requires `T: Sized`
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fn drop(&mut self) {
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if !self._ptr.is_null() {
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}
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}
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}
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fn main() {
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let x:G<dyn Bar>;
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}
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