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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>
5 #include <stan/math/prim/scal/fun/inv_cloglog.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(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 var& a) {
37 return var(new inv_cloglog_vari(a.vi_));
38 }
39
40 }
41 }
42 #endif
core.hpp
stan
Definition: log_sum_exp.hpp:8
inv_cloglog.hpp
stan::math::var
Independent (input) and dependent (output) variables for gradients.
Definition: var.hpp:30
stan::math::exp
fvar< T > exp(const fvar< T > &x)
Definition: exp.hpp:10
stan::math::var::vi_
vari * vi_
Pointer to the implementation of this variable.
Definition: var.hpp:42
stan::math::inv_cloglog
fvar< T > inv_cloglog(const fvar< T > &x)
Definition: inv_cloglog.hpp:14

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