manual-range-contains

Prefer range membership over equivalent bound comparisons

Separate lower-bound and upper-bound comparisons obscure a range membership test.
Instead, you SHOULD call .contains() on the corresponding range.

Out-of-range disjunctions over floating-point values are excluded because negating .contains() changes NaN behavior.

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

Reported

function isByte(value: int64): boolean {
    return value >= 0 && value <= 255;
}
Accepted

function isByte(value: int64): boolean {
    return (0..=255).contains(value);
}
Prior art

- Clippy · manualrangecontains

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