no-identity-operation

Disallow arithmetic with an operand that cannot change the result

An integral identity operation such as value + 0 returns the other operand unchanged.
Instead, you SHOULD remove the operation.

- Category: suspicious
- Level: warning
- Fix: automatic
- Scope: module

Reported

function retain(value: int32): int32 {
    return value + 0;
}
Accepted

function retain(value: int32): int32 {
    return value;
}
Prior art

- Clippy · identityop

language/linter/src/rules/suspicious/noidentityoperation.rs:8