functional_base.h

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#ifndef FUNCTIONAL_BASE_H
#define FUNCTIONAL_BASE_H
 
#include "Platform.h"
 
namespace dyno
{
    template <typename Argument, typename Result>
    struct unary_function
    {
        typedef Argument argument_type;
        typedef Result   result_type;
        DYN_FUNC unary_function() = default;
    };
 
 
    template <typename Argument1, typename Argument2, typename Result>
    struct binary_function
    {
        typedef Argument1 first_argument_type;
        typedef Argument2 second_argument_type;
        typedef Result    result_type;
        DYN_FUNC binary_function() = default;
    };
 
    template <typename T = void>
    struct less : public binary_function<T, T, bool>
    {
        DYN_FUNC constexpr bool operator()(const T& a, const T& b) const
        {
            return a < b;
        }
    };
 
    template <typename T = void>
    struct greater : public binary_function<T, T, bool>
    {
        DYN_FUNC constexpr bool operator()(const T& a, const T& b) const
        {
            return a > b;
        }
    };
    
    template <typename T = void>
    struct predicate : public binary_function<T, T, bool> {
        DYN_FUNC constexpr bool operator()(const T& a, const T& b) const
        {
            return a == b;
        }
    };
}
 
 
#endif // FUNCTIONAL_BASE