libcruft-util/test/tuple/type.cpp

#include "tap.hpp"

#include "tuple/type.hpp"

#include <typeindex>

template <typename T>
struct int_mapper
{
    typedef int type;
};


int
main (void)
{
    util::TAP::logger tap;

    {
        using tuple_t = std::tuple<float,int,void>;
        tap.expect_eq (util::tuple::type::index<tuple_t,int>::value, 1u, "tuple index extraction");
    }

    {
#if !defined(NO_RTTI)
        auto tuple = std::make_tuple (1u, 1, 1.f, 1.);
        std::vector<std::type_index> expected {
            std::type_index (typeid (1u)),
            std::type_index (typeid (1)),
            std::type_index (typeid (1.f)),
            std::type_index (typeid (1.))
        };

        std::vector<std::type_index> actual;
        util::tuple::type::each<decltype(tuple)> ([&actual] (auto i) {
            actual.push_back (typeid (typename decltype(i)::type));
        });

        tap.expect_eq (actual, expected, "type iteration");
#else
        tap.skip ("type iteration because no-rtti");
#endif
    }

    {

        using src_t = std::tuple<std::string>;
        using dst_t = typename util::tuple::type::map<src_t, int_mapper>::type;

        tap.expect (std::is_same<dst_t, std::tuple<int>>::value, "tuple type mapping");
    }

    return tap.status ();
}