manual-ascii-check

Prefer character predicates over ASCII range checks

Standard ASCII ranges written as comparisons, range membership, or patterns obscure their character class.
Instead, you SHOULD call the corresponding isAscii character predicate.

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

Reported

function isLowercase(character: char): boolean {
    return character >= 'a' && character <= 'z';
}
Accepted

function isLowercase(character: char): boolean {
    return character.isAsciiLowercase();
}
Prior art

- Clippy · manualisasciicheck

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