step.hpp

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#ifndef __STAN__AGRAD__REV__STEP_HPP__
#define __STAN__AGRAD__REV__STEP_HPP__

#include <stan/agrad/rev/var.hpp>

namespace stan {
  namespace agrad {

    inline var step(const stan::agrad::var& a) {
      return var(new vari(a.vi_->val_ < 0.0 ? 0.0 : 1.0));
    }

  }
}
#endif