Stan Math Library  2.8.0
reverse mode automatic differentiation
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inv_cloglog.hpp
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1 #ifndef STAN_MATH_REV_SCAL_FUN_INV_CLOGLOG_HPP
2 #define STAN_MATH_REV_SCAL_FUN_INV_CLOGLOG_HPP
3 
4 #include <stan/math/rev/core.hpp>
6 
7 namespace stan {
8  namespace math {
9 
10  namespace {
11  class inv_cloglog_vari : public op_v_vari {
12  public:
13  explicit inv_cloglog_vari(vari* avi) :
14  op_v_vari(stan::math::inv_cloglog(avi->val_), avi) {
15  }
16  void chain() {
17  avi_->adj_ += adj_ * std::exp(avi_->val_ - std::exp(avi_->val_));
18  }
19  };
20  }
21 
36  inline var inv_cloglog(const stan::math::var& a) {
37  return var(new inv_cloglog_vari(a.vi_));
38  }
39 
40  }
41 }
42 #endif
Independent (input) and dependent (output) variables for gradients.
Definition: var.hpp:32
fvar< T > exp(const fvar< T > &x)
Definition: exp.hpp:10
vari * vi_
Pointer to the implementation of this variable.
Definition: var.hpp:44
fvar< T > inv_cloglog(const fvar< T > &x)
Definition: inv_cloglog.hpp:15

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