Вопрос Выражение не определяется константой

[k3ls]

namespace function_detail {
    template <typename Function, bool is_yielding>
    struct upvalue_free_function {
        typedef std::remove_pointer_t<std::decay_t<Function>> function_type;
        typedef meta::bind_traits<function_type> traits_type;

        static int real_call(lua_State* L) noexcept(traits_type::is_noexcept) {
            auto udata = stack::stack_detail::get_as_upvalues<function_type*>(L);
            function_type* fx = udata.first;
            return call_detail::call_wrapped<void, true, false>(L, fx);
        }

        static int call(lua_State* L) {
            int nr = detail::typed_static_trampoline<decltype(&real_call), (&real_call)>(L);
            if (is_yielding) {
                return lua_yield(L, nr);
            }
            else {
                return nr;
            }
        }

        int operator()(lua_State* L) {
            return call(L);
        }
    };

 

[Dimedrol]

namespace function_detail {
    template <typename Function, bool is_yielding>
    struct upvalue_free_function {
        typedef std::remove_pointer_t<std::decay_t<Function>> function_type;
        typedef meta::bind_traits<function_type> traits_type;

        static int real_call(lua_State* L) noexcept(traits_type::is_noexcept) {
            auto udata = stack::stack_detail::get_as_upvalues<function_type*>(L);
            function_type* fx = udata.first;
            return call_detail::call_wrapped<void, true, false>(L, fx);
        }

        static int call(lua_State* L) {
            int nr = detail::typed_static_trampoline<decltype(&real_call), (&real_call)>(L);
            if (is_yielding) {
                return lua_yield(L, nr);
            }
            else {
                return nr;
            }
        }

        int operator()(lua_State* L) {
            return call(L);
        }
    };

Посмотреть вложение 107055Посмотреть вложение 107056

#include <iterator>
#include <vector>
#include <utility>
#include <iostream>
using namespace std;