Automatic Differentiation
 
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operator_unary_decrement.hpp
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1#ifndef STAN_MATH_REV_CORE_OPERATOR_UNARY_DECREMENT_HPP
2#define STAN_MATH_REV_CORE_OPERATOR_UNARY_DECREMENT_HPP
3
4#include <stan/math/prim/meta.hpp>
5#include <stan/math/rev/core/var.hpp>
6#include <stan/math/rev/core/callback_vari.hpp>
7#include <stan/math/prim/fun/constants.hpp>
8#include <stan/math/prim/fun/is_nan.hpp>
9
10namespace stan {
11namespace math {
12
26inline var& operator--(var& a) {
27 a = make_callback_var(a.val() - 1.0, [a](auto& vi) { a.adj() += vi.adj(); });
28 return a;
29}
30
42inline var operator--(var& a, int /*dummy*/) {
43 var temp(a);
44 a = make_callback_var(a.val() - 1.0, [a](auto& vi) { a.adj() += vi.adj(); });
45 return temp;
46}
47
48} // namespace math
49} // namespace stan
50#endif
callback_vari.hpp
stan::math::var_value< double >
stan::math::operator--
var & operator--(var &a)
Prefix decrement operator for variables (C++).
Definition operator_unary_decrement.hpp:26
stan::math::make_callback_var
var_value< plain_type_t< T > > make_callback_var(T &&value, F &&functor)
Creates a new var initialized with a callback_vari with a given value and reverse-pass callback funct...
Definition callback_vari.hpp:61
stan
The lgamma implementation in stan-math is based on either the reentrant safe lgamma_r implementation ...
Definition unit_vector_constrain.hpp:15
is_nan.hpp