fmt_guard.hpp

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#ifndef IOF_FMT_GUARD_HPP_
#define IOF_FMT_GUARD_HPP_

#include "iof/fmt_spec.hpp"


namespace iof 
{
    

class fmt_guard
{
    public:
        fmt_guard(std::ios& strm): my_fmt(strm), my_strm(strm) {}
        
        template <typename Stream>
        fmt_guard(Stream& strm, const fmt_spec& newFmt)
            : my_fmt(strm), my_strm(strm) {strm << newFmt;}
            
        template <typename Stream>
        fmt_guard(Stream& strm, const char* newFmt)
            : my_fmt(strm), my_strm(strm) {strm << fmt_spec(newFmt);}
            
       ~fmt_guard() { my_fmt.applyTo(my_strm); }
       
    private:
        const stream_fmt my_fmt;
        std::ios&        my_strm;
};

} // namespace iof

#endif // IOF_FMT_GUARD_HPP_

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