protected function compileRequired($key, $masque)
    {
        if (!isset($this->inputs[$key])
            || is_null($this->inputs[$key])
            || $this->inputs[$key] === ''
        ) {
            $this->last_message = $message = $this->lexique('required', $key);
            
            $this->errors[$key][] = [
                "masque" => $masque,
                "message" => $message
            ];
            
            $this->fails = true;
        }
    }