Comparisons.hh

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#ifndef CASM_Comparisons
#define CASM_Comparisons
 
#include "casm/misc/CRTPBase.hh"
 
namespace notstd {
 
template <typename Base>
struct Comparisons : public Base {
  using Base::derived;
  typedef typename Base::MostDerived MostDerived;
 
  bool operator>(const MostDerived &B) const { return B < derived(); };
 
  bool operator<=(const MostDerived &B) const { return !(B < derived()); };
 
  bool operator>=(const MostDerived &B) const { return !(derived() < B); };
 
  bool operator==(const MostDerived &B) const { return derived().eq_impl(B); };
 
  bool operator!=(const MostDerived &B) const { return derived().ne_impl(B); };
 
 protected:
  bool eq_impl(const MostDerived &B) const {
    return (!(derived() < B) && !(B < derived()));
  };
 
  bool ne_impl(const MostDerived &B) const { return !derived().eq_impl(B); };
};
 
}  // namespace notstd
 
namespace CASM {
template <typename Base>
using Comparisons = notstd::Comparisons<Base>;
}
 
#endif