icomparable.h

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#pragma once
#include "interface.h"
#include "types.h"
 
namespace xtd {
  template <typename type_t>
  class icomparable interface_ {
  public:
    
    virtual int32 compare_to(const type_t& obj) const noexcept = 0;
    
    friend bool operator <(const type_t& a, const type_t& b) noexcept {return a.compare_to(b) < 0;}
    friend bool operator <=(const type_t& a, const type_t& b) noexcept {return a.compare_to(b) <= 0;}
    friend bool operator >(const type_t& a, const type_t& b) noexcept {return a.compare_to(b) > 0;}
    friend bool operator >=(const type_t& a, const type_t& b) noexcept {return a.compare_to(b) >= 0;}
    template<typename object_t>
    friend bool operator <(const type_t& a, const icomparable<object_t>& b) noexcept {return dynamic_cast<const type_t*>(&b) && a.compare_to(dynamic_cast<const type_t&>(b)) < 0;}
    template<typename object_t>
    friend bool operator <=(const type_t& a, const icomparable<object_t>& b) noexcept {return dynamic_cast<const type_t*>(&b) && a.compare_to(dynamic_cast<const type_t&>(b)) <= 0;}
    template<typename object_t>
    friend bool operator >(const type_t& a, const icomparable<object_t>& b) noexcept {return dynamic_cast<const type_t*>(&b) && a.compare_to(dynamic_cast<const type_t&>(b)) > 0;}
    template<typename object_t>
    friend bool operator >=(const type_t& a, const icomparable<object_t>& b) noexcept {return dynamic_cast<const type_t*>(&b) && a.compare_to(dynamic_cast<const type_t&>(b)) >= 0;}
  };
}