《微型LISP解释器的构造与实现》勘误 P24

[ccat]

P24 页 NumberParser 的类型参数写反了，应为：

public class NumberParser implements Parsec<Character, Double> {
    private final Parsec<Character, String> parser = decimal();
    @Override
    public Double parse(State<Character> s) throws EOFException, ParsecException {
        var data = parser.parse(s);
        return Double.parseDouble(data);
    }
}