log1p_exp.hpp

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#ifndef STAN_MATH_FWD_FUN_LOG1P_EXP_HPP
#define STAN_MATH_FWD_FUN_LOG1P_EXP_HPP
 
#include <stan/math/fwd/meta.hpp>
#include <stan/math/fwd/core.hpp>
#include <stan/math/fwd/fun/inv_logit.hpp>
#include <stan/math/prim/fun/log1p_exp.hpp>
#include <cmath>
 
namespace stan {
namespace math {
 
template <typename T>
inline fvar<T> log1p_exp(const fvar<T>& x) {
  return fvar<T>(log1p_exp(x.val_), x.d_ * inv_logit(x.val_));
}
 
}  // namespace math
}  // namespace stan
#endif