Program Listing for File log.h

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#ifndef f3d_log_h
#define f3d_log_h

#include "export.h"

#include <sstream>
#include <string>

namespace f3d
{
class F3D_EXPORT log
{
public:
  enum class VerboseLevel : unsigned char
  {
    DEBUG = 0,
    INFO,
    WARN,
    ERROR,
    QUIET
  };

  template<typename... Args>
  static void print(VerboseLevel level, Args... args)
  {
    std::stringstream ss;
    log::appendArg(ss, args...);
    log::printInternal(level, ss.str());
  }

  template<typename... Args>
  static void debug(Args... args)
  {
    std::stringstream ss;
    log::appendArg(ss, args...);
    log::debugInternal(ss.str());
  }

  template<typename... Args>
  static void info(Args... args)
  {
    std::stringstream ss;
    log::appendArg(ss, args...);
    log::infoInternal(ss.str());
  }

  template<typename... Args>
  static void warn(Args... args)
  {
    std::stringstream ss;
    log::appendArg(ss, args...);
    log::warnInternal(ss.str());
  }

  template<typename... Args>
  static void error(Args... args)
  {
    std::stringstream ss;
    log::appendArg(ss, args...);
    log::errorInternal(ss.str());
  }

  static void setUseColoring(bool use);

  static void setVerboseLevel(VerboseLevel level, bool forceStdErr = false);

protected:
  static void appendArg(std::stringstream&)
  {
  }

  template<typename T, typename... Args>
  static void appendArg(std::stringstream& ss, T value, Args... args)
  {
    ss << value;
    log::appendArg(ss, args...);
  }

  static void printInternal(VerboseLevel level, const std::string& msg);
  static void errorInternal(const std::string& msg);
  static void warnInternal(const std::string& msg);
  static void infoInternal(const std::string& msg);
  static void debugInternal(const std::string& msg);
};
}

#endif