Invalid cast lexy::lexeme<lexy::_br8> to int processing a float

[EmmanuelMess]

I am trying to read an int then and optional int and recreate the float from that. But it requires a weird conversion from lexy::lexemelexy::_br8 that I am not sure how it happened.

My production is:

        struct Decimal : lexy::token_production {
            struct IntegerPart : lexy::transparent_production {
                static constexpr auto rule =
                  dsl::minus_sign + dsl::integer<int>(dsl::digits<>.no_leading_zero());
                static constexpr auto value = lexy::as_integer<int>;
            };

            struct DecimalPart : lexy::transparent_production {
                static constexpr auto rule = dsl::lit_c<'.'> >> dsl::capture(dsl::digits<>);
                static constexpr auto value = lexy::as_integer<int>;
            };

            static constexpr auto rule = dsl::peek(dsl::lit_c<'-'> / dsl::digit<>)
                                         >> (dsl::p<IntegerPart> + dsl::opt(dsl::p<DecimalPart>));
            static constexpr auto value = lexy::callback<ast::Decimal>(
              [](int integer, lexy::nullopt) {
                  return integer;
              },
              [](auto integer, int decimal) {
                  const double numberOfDigits = decimal > 0 ? std::ceil(std::log10(decimal)) : 1;

                  return static_cast<double>(integer) + decimal * std::pow(10.0, -1 * numberOfDigits);
            });
        };

Any pointers?

Full code https://godbolt.org/z/5fGjT4Msb

[EmmanuelMess]

The problem here is that dsl::capture returns a lexme, changing the capture to dsl::capture(dsl::digits<>) works.