no-self-assignment

Disallow assigning a stable place to itself

Assigning a stable storage place to itself leaves its value unchanged and performs a useless write.
Instead, you SHOULD remove the assignment or correct the unintended operand.

- Category: suspicious
- Level: warning
- Fix: none
- Scope: module

Reported

function retain(value: int32): int32 {
    let result = value;
    result = result;
    return result;
}
Accepted

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

- Clippy · selfassignment
- ESLint · no-self-assign

language/linter/src/rules/suspicious/noselfassignment.rs:7