Rust

In tuple or struct patterns, zero or more "remaining" elements can be discarded using the rest (..) pattern and exactly one element can be discarded using the wildcard pattern (_). This checker looks for wildcard patterns next to a rest pattern. The wildcard is unnecessary because the rest pattern can match that element as well.

Certain forms of fold have concise alternatives, such as sum, product, any or all. Prefer these forms where applicable as they improve readability.

match statements with only one useful arm can be reduced to an if-else statement. This helps improve readability, an if-else statement nests lesser than a match.