manual-integer-log

Prefer integerLog2 over equivalent base-two integer logarithms

Subtracting the leading-zero count from an integer width manually computes its base-two logarithm.
Instead, you SHOULD call integerLog2, which states the operation directly and preserves exact integer behavior.

- Category: style
- Level: warning
- Fix: suggestion
- Scope: module

Reported

function magnitude(value: uint32): uint32 {
    return 31 - value.countLeadingZeros();
}
Accepted

function magnitude(value: uint32): uint32 {
    return value.integerLog2();
}
Prior art

- Clippy · manualilog2

language/linter/src/rules/style/manualintegerlog.rs:8