Function LowerFirst

token/token.go:287–302

LowerFirst lower cases the first rune of s

(caser Caser, s string)

// LowerFirst lower cases the first rune of s
func LowerFirst(caser Caser, s string) string {
	caser = CaserOrDefault(caser)
	if len(s) == 0 {
		return ""
	}
	sb := strings.Builder{}
	sb.Grow(len(s))
	for i, r := range s {
		if i == 0 {
			sb.WriteRune(caser.ToLower(r))
		} else {
			sb.WriteRune(r)
		}
	}
	return sb.String()
}

// IsNumber reports true if the string is considered a valid number based on the
// following rules: