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authorsurechen <chenshuo17@huawei.com>2023-11-10 10:11:24 +0800
committersurechen <chenshuo17@huawei.com>2024-02-18 16:38:11 +0800
commita61126cef6c4083d57e22835033eb2eefdd31bac (patch)
tree8816d1d780e97b77f943c48de09ee330fee3ac9d /compiler/rustc_data_structures/src/transitive_relation
parentd3df8ff85121146f2ac5e863e0c9eaba4bf35d32 (diff)
downloadrust-a61126cef6c4083d57e22835033eb2eefdd31bac.tar.gz
rust-a61126cef6c4083d57e22835033eb2eefdd31bac.zip
By tracking import use types to check whether it is scope uses or the other situations like module-relative uses, we can do more accurate redundant import checking.
fixes #117448

For example unnecessary imports in std::prelude that can be eliminated:

```rust
use std::option::Option::Some;//~ WARNING the item `Some` is imported redundantly
use std::option::Option::None; //~ WARNING the item `None` is imported redundantly
```
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