Yosymfony\Toml\Parser::isLiteralFloat PHP 메소드

    private function isLiteralFloat(Token $token)
    {
        return preg_match('/^[+-]?(((\\d_?)+[\\.](\\d_?)+)|(((\\d_?)+[\\.]?(\\d_?)*)[eE][+-]?(\\d_?)+))$/', $token->getValue());
    }