static constexpr decltype(auto) visit(V&& v, ST&& st) noexcept
{
if (value_or_error::has_value(forward<ST>(st)))
return JASEL_INVOKE(forward<V>(v),value_or_error::deref(forward<ST>(st)));
return JASEL_INVOKE(forward<V>(v), value_or_error::error(forward<ST>(st)) );
}
BOOST_CXX14_CONSTEXPR
value_type_t<remove_cvref_t<N>>
resolve(N&& n, F&& f)
{
if (value_or_none::has_value(forward<N>(n)))
{
return value_or_none::deref(forward<N>(n));
}
return JASEL_INVOKE(std::forward<F>(f), value_or_none::none<remove_cvref_t<N>>() );
}
BOOST_CXX14_CONSTEXPR
value_type_t<meta::uncvref_t<N>>
apply_or(N&& n, F&& f, T&& v)
{
if (nullable::has_value(forward<N>(n)))
{
return JASEL_INVOKE(std::forward<F>(f), nullable::deref(forward<N>(n)));
}
return forward<T>(v);
}
