#include <iostream>
#include <sstream>
#include <stdexcept>
#include <iomanip>
 
class log_error
{
public:
    log_error() = default;
    log_error(log_error&& other) = default;
    ~log_error()
    {
        // Do whatever you want with the input
        // Add a timestamp, process/thread id
        // Write it to a file, send it to a server ...
        std::cerr << "[ERROR] " << ss.str() << std::endl;
        throw std::runtime_error(ss.str());
    }
 
    std::stringstream ss;
};
 
template<typename  T>
log_error operator<<(log_error&& le, const T& t)
{
    le.ss << t;
    return std::move(le);
}
 
// For basic usage, you don't need a non-move operator<< / constructor.
// For more complex use you may want to provide it.
int main()
{
    log_error() << "Ooops " << 23 << ", 0x" << std::setbase(16) << 23;
    return 0;
}

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