log1m_inv_logit.hpp

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#ifndef STAN_MATH_REV_FUN_LOG1M_INV_LOGIT_HPP
#define STAN_MATH_REV_FUN_LOG1M_INV_LOGIT_HPP
 
#include <stan/math/rev/meta.hpp>
#include <stan/math/rev/fun/inv_logit.hpp>
#include <stan/math/rev/core.hpp>
#include <stan/math/prim/fun/log1m_inv_logit.hpp>
 
namespace stan {
namespace math {
 
template <typename T, require_stan_scalar_or_eigen_t<T>* = nullptr>
inline auto log1m_inv_logit(const var_value<T>& u) {
  auto precomp_inv_logit = to_arena(as_array_or_scalar(-inv_logit(u.val())));
  return make_callback_var(
      log1m_inv_logit(u.val()), [u, precomp_inv_logit](auto& vi) mutable {
        as_array_or_scalar(u.adj())
            += as_array_or_scalar(vi.adj()) * precomp_inv_logit;
      });
}
 
}  // namespace math
}  // namespace stan
#endif