Function throwExceptionFromExpected

source/MRPython/MRPython.h:227–233

// overload `toString` functoion to throw exception from custom `Expected::error` type
template<typename E>
[[noreturn]] void throwExceptionFromExpected(const E& err)
{
    if constexpr (std::is_nothrow_convertible<E, std::string>::value)
        throw std::runtime_error(err);
    else
        throw std::runtime_error(toString(err));
}

// Like `e.value()`, but throws using `throwExceptionFromExpected` (which is better, because it allows Python to see the proper error message), and also supports `T == void`.
template <typename T>