Function isLcalpha

http/unstable_structured_fields.ts:461–464

Check if character is lowercase alphabetic (a-z)

(c: string)

/** Check if character is lowercase alphabetic (a-z) */
function isLcalpha(c: string): boolean {
  const code = c.charCodeAt(0);
  return code >= CHAR_CODE_LOWER_A && code <= CHAR_CODE_LOWER_Z;
}

/** Check if character is valid at the start of a key (lcalpha or "*") */
function isKeyStart(c: string): boolean {