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Unused trait imports (formerly anonymous trait import) For #11969 I'm looking for help and feedback on implementing a new lint for suggesting `use ... as _` for traits where possible. I have had a go at implementing this but I don't know if this is the best way to do it as I am new to clippy. There are some edge cases I can think of where this doesn't work but have aired on the side of false negatives instead of false positives. An example of a false negative. I couldn't figure out the best way to resolve an import from within clippy. The sub module imports MyAny so that cannot be anonymized but `use std::any::Any` could be. In this case it is not caught because `Any` and `MyAny` have the same DefId. ```rust mod nested_mod_used_bad1 { use std::any::Any; use std::any::Any as MyAny; mod foo { use crate::nested_mod_used_bad1::MyAny; fn foo() { println!("{:?}", MyAny::type_id("foo")); } } } ``` Any feedback is much appreciated. ------- changelog: new lint: `unused_trait_names` |
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