#pragma once

#ifndef TCG_FUNCTIONAL_H

#define TCG_FUNCTIONAL_H

#include "traits.h"

// std includes

#include <functional></functional>

//**********************************************************************************

//    Logical functor combinators

//**********************************************************************************

namespace tcg {

template <typename fn1,="" fn2="" typename=""></typename>

class unary_and

    : public std::unary_function<typename function_traits<fn1="">::arg_type,</typename>

                                 bool> {

  Fn1 m_fn1;

  Fn2 m_fn2;

public:

  unary_and(const Fn1 &fn1, const Fn2 &fn2) : m_fn1(fn1), m_fn2(fn2) {}

  bool operator()(const typename function_traits<fn1>::arg_type &t) const {</fn1>

    return m_fn1(t) && m_fn2(t);

  }

};

template <typename fn1,="" fn2="" typename=""></typename>

unary_and<fn1, fn2=""> and1(const Fn1 &fn1, const Fn2 &fn2) {</fn1,>

  return unary_and<fn1, fn2="">(fn1, fn2);</fn1,>

}

//----------------------------------------------------------------------------------

template <typename fn1,="" fn2="" typename=""></typename>

class unary_or

    : public std::unary_function<typename function_traits<fn1="">::arg_type,</typename>

                                 bool> {

  Fn1 m_fn1;

  Fn2 m_fn2;

public:

  unary_or(const Fn1 &fn1, const Fn2 &fn2) : m_fn1(fn1), m_fn2(fn2) {}

  bool operator()(const typename function_traits<fn1>::arg_type &t) const {</fn1>

    return m_fn1(t) || m_fn2(t);

  }

};

template <typename fn1,="" fn2="" typename=""></typename>

unary_or<fn1, fn2=""> or1(const Fn1 &fn1, const Fn2 &fn2) {</fn1,>

  return unary_or<fn1, fn2="">(fn1, fn2);</fn1,>

}

}  // namespace tcg

#endif  // TCG_FUNCTIONAL_H