log.h


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#pragma once

#include <iostream>
#include <ostream>
#include <sstream>
#include <string>

class log_stream
{
public:
  log_stream();

  void log_lines(int n);

  std::string get_log();

  // log to buffer
  void activate();

  // log to plain console
  void deactivate();

  template<typename T>
  log_stream& operator<<(const T& arg) {
    if (m_active) {
      m_buffer << arg;
      trim_buffer();
    }
    else
    {
      std::cout << arg;
    }
    return *this;
  }

  log_stream& operator<<(
    std::basic_ostream<char>& (*func)
        (std::basic_ostream<char>&) );

private:
  void trim_buffer();

  bool m_active;
  std::stringstream m_buffer;
  int m_log_lines;
};

extern log_stream log_cout;