dylint

ref_aware_redundant_closure_for_method_calls

What it does

This is essentially a ref-aware fork of Clippy’s redundant_closure_for_method_calls lint. It suggests to remove a closure when made possible by a use of as_ref, as_mut, as_deref, or as_deref_mut.

Known problems

Currently works only for Options.

Example

Some(String::from("a")).map(|s| s.is_empty());
Some(String::from("a")).map(|s| s.to_uppercase());

Use instead:

Some(String::from("a")).as_ref().map(String::is_empty);
Some(String::from("a")).as_deref().map(str::to_uppercase);

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