less aggressive needless_borrows_for_generic_args #12706
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Current implementation looks for significant drops, that can change the behavior, but that's not enough - value might not have a Drop itself but one of its children might have it. A good example is passing a reference to `PathBuf` to `std::fs::File::open`. There's no benefits to pass `PathBuf` by value, but since clippy can't see `Drop` on `Vec` several layers down it complains forcing pass by value and making it impossible to use the same name later. New implementation only looks at copy values or values created inplace so existing variable will never be moved but things that take a string reference created and value is created inplace `&"".to_owned()` will make it to suggest to use `"".to_owned()` still. Fixes rust-lang#12454
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Thank you. @bors r+ |
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☀️ Test successful - checks-action_dev_test, checks-action_remark_test, checks-action_test |
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Current implementation looks for significant drops, that can change the behavior, but that's not enough - value might not have a
Dropitself but one of its children might have it.A good example is passing a reference to
PathBuftostd::fs::File::open. There's no benefits to passPathBufby value, but sinceclippycan't seeDroponVecseveral layers down it complains forcing pass by value and making it impossible to use the same name later.New implementation only looks at copy values or values created in place so existing variable will never be moved but things that take a string reference created and value is created inplace
&"".to_owned()will make it to suggest to use"".to_owned()still.Fixes #12454
changelog: [
needless_borrows_for_generic_args]: avoid moving variables