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#ifndef INCLUDED_LOG_
#define INCLUDED_LOG_
#include <iosfwd>
#include <fstream>
#include <string>
class Log
{
friend Log &nl(Log &log);
bool d_active;
unsigned d_begin;
unsigned d_end;
bool d_ignore; // log is ignored if in d_ignored
// g_log('X') calls are not logged
std::string d_ignored; // if X in d_ignored
std::ofstream d_logFile;
bool d_set;
public:
Log();
// only interpreted at the
// first call (in d_options)
void set(unsigned begin, unsigned end, std::string const &fname,
std::string const &ignored);
bool active() const; // true: logs are produced
void caseIdx(size_t idx); // sets d_active if nr in range
std::ofstream &out(); // d_logFile
Log &operator()(int ignore); // if ignored -> no log
};
inline bool Log::active() const
{
return d_active;
}
inline std::ofstream &Log::out() // d_logFile
{
return d_logFile;
}
Log &nl(Log &log);
inline Log &operator<<(Log &log, Log &(*nl)(Log &))
{
return nl(log);
}
template <typename Type>
Log &operator<<(Log &log, Type &&type)
{
if (log.active())
log.out() << std::forward<Type>(type);
return log;
}
extern Log g_log;
#endif
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