include/barrett/detail/os.h

#ifndef BARRETT_DETAIL_OS_H_
#define BARRETT_DETAIL_OS_H_


#include <string>
#include <boost/format.hpp>


namespace barrett {
namespace detail {


class LogFormatter : public boost::format {
public:
        LogFormatter(const std::string& fmt, bool outputToStderr) :
                boost::format(fmt), ose(outputToStderr), printed(false) {}
        ~LogFormatter() { print(); }

        template <typename ExceptionType>
        void raise(bool alsoPrint = false) {
                if (alsoPrint) {
                        print();
                } else {
                        printed = true;
                }

                // It's necessary to do this in a member function because it's unsafe to
                // throw exceptions from a dtor.
                throw ExceptionType(str());
        }


        // Reimplemented in order to return LogFormatter instead of boost::format
        template<class T>
        LogFormatter& operator%(const T& x) {
                boost::format::operator%(x);  // Call super
                return *this;
        }

protected:
        void print();

        bool ose;
        bool printed;
};


}
}


#endif /* BARRETT_DETAIL_OS_H_ */