Function decorateExpected

source/MRPython/MRPython.h:253–266

template<typename R, typename E, typename... Args>
auto decorateExpected( std::function<Expected<R, E>( Args... )>&& f ) -> std::function<R( Args... )>
{
    return[fLocal = std::move( f )]( Args&&... args ) mutable -> R
    {
        auto res = fLocal(std::forward<Args>( args )...);
        if (!res.has_value())
            throwExceptionFromExpected(res.error());

        if constexpr (std::is_void<R>::value)
            return;
        else
            return res.value();
    };
}

template<typename F>
auto decorateExpected( F&& f )