operator_less_than.hpp

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#ifndef STAN__AGRAD__FWD__OPERATORS__OPERATOR_LESS_THAN_HPP
#define STAN__AGRAD__FWD__OPERATORS__OPERATOR_LESS_THAN_HPP

#include <stan/agrad/fwd/fvar.hpp>
#include <stan/meta/traits.hpp>

namespace stan {

  namespace agrad {

    template <typename T>
    inline bool operator<(const fvar<T>& x,
                          double y) {
      return x.val_ < y;
    }

    template <typename T>
    inline bool operator<(double x,
                          const fvar<T>& y) {
      return x < y.val_;
    }

    template <typename T>
    inline bool operator<(const fvar<T>& x,
                          const fvar<T>& y) {
      return x.val_ < y.val_;
    }
  }
}
#endif