debug.h


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#pragma once

#include <iostream>
#include <ostream>

class debug_ostream
{
public:
  debug_ostream(): m_active(false) {}

  void activate()
  {
    m_active = true;
  }

  void deactivate()
  {
    m_active = false;
  }

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

  debug_ostream& operator<<(
    std::basic_ostream<char>& (*func)
        (std::basic_ostream<char>&) ) {
    if (m_active)
      std::cout << *func;
    return *this;
  }

private:
  bool m_active;
};

extern debug_ostream debug_cout;