Why is this an issue?

Redundant comparisons against constants results in always-true or always-false conditions. They add unnecessary complexity to the code and often indicate a logical error where the developer might have intended a different comparison operator or a comparison with another value.

Code examples

Noncompliant code example

let status_code = 200;
if status_code <= 400 && status_code < 500 {} // Noncompliant: Redundant double comparison.

Compliant solution

let status_code = 200;
if status_code < 500 {} // Compliant: Corrected the comparison logic.

Resources

Documentation

• Clippy Lints - https://rust-lang.github.io/rust-clippy/master/index.html#redundant_comparisons