// Identifier turns a C style type or field name into an exportable Go equivalent.
func Identifier(s string) string {
	s = strings.TrimSpace(s)
	if s == "" {
		return s
	}

	capNext := true
	prevIsCap := false
	return strings.Map(func(v rune) rune {
		vIsCap := unicode.IsUpper(v)
		if capNext {
			if unicode.IsLower(v) {
				v = unicode.ToUpper(v)
			}
			vIsCap = true
		} else if prevIsCap && unicode.IsUpper(v) {
			v = unicode.ToLower(v)
		}
		prevIsCap = vIsCap

		if unicode.IsLetter(v) {
			capNext = false
			return v
		} else if unicode.IsNumber(v) {
			capNext = true
			return v
		} else {
			capNext = v == '_' || unicode.IsSpace(v) || v == '-' || v == '.'
			return -1
		}
	}, s)
}