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| author | bors <bors@rust-lang.org> | 2020-09-03 23:27:45 +0000 |
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| committer | bors <bors@rust-lang.org> | 2020-09-03 23:27:45 +0000 |
| commit | af3c6e733a40e671550e0f0f5aeecaa13772ba56 (patch) | |
| tree | 6234193bc514a97e899369463b0937774a4b159d /compiler/rustc_codegen_llvm/src/back/write.rs | |
| parent | 0d0f6b113047b2cf9afbde990cee30fd5b866469 (diff) | |
| parent | e7d7615105332f269a27cbd7273029377a96ccdf (diff) | |
| download | rust-af3c6e733a40e671550e0f0f5aeecaa13772ba56.tar.gz rust-af3c6e733a40e671550e0f0f5aeecaa13772ba56.zip | |
Auto merge of #73996 - da-x:short-unique-paths, r=petrochenkov
diagnostics: shorten paths of unique symbols This is a step towards implementing a fix for #50310, and continuation of the discussion in [Pre-RFC: Nicer Types In Diagnostics - compiler - Rust Internals](https://internals.rust-lang.org/t/pre-rfc-nicer-types-in-diagnostics/11139). Impressed upon me from previous discussion in #21934 that an RFC for this is not needed, and I should just come up with code. The recent improvements to `use` suggestions that I've contributed have given rise to this implementation. Contrary to previous suggestions, it's rather simple logic, and I believe it only reduces the amount of cognitive load that a developer would need when reading type errors. ----- If a symbol name can only be imported from one place, and as long as it was not glob-imported anywhere in the current crate, we can trim its printed path to the last component. 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 from anywhere.
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