1 #ifndef STAN_MATH_REV_CORE_OPERATOR_ADDITION_HPP
2 #define STAN_MATH_REV_CORE_OPERATOR_ADDITION_HPP
14 class add_vv_vari :
public op_vv_vari {
16 add_vv_vari(vari* avi, vari* bvi) :
17 op_vv_vari(avi->val_ + bvi->val_, avi, bvi) {
22 avi_->adj_ = std::numeric_limits<double>::quiet_NaN();
23 bvi_->adj_ = std::numeric_limits<double>::quiet_NaN();
31 class add_vd_vari :
public op_vd_vari {
33 add_vd_vari(vari* avi,
double b) :
34 op_vd_vari(avi->val_ + b, avi, b) {
39 avi_->adj_ = std::numeric_limits<double>::quiet_NaN();
85 return var(
new add_vv_vari(a.
vi_, b.
vi_));
102 return var(
new add_vd_vari(a.
vi_, b));
119 return var(
new add_vd_vari(b.
vi_, a));
Independent (input) and dependent (output) variables for gradients.
vari * vi_
Pointer to the implementation of this variable.
fvar< T > operator+(const fvar< T > &x1, const fvar< T > &x2)
int is_nan(const fvar< T > &x)
Returns 1 if the input's value is NaN and 0 otherwise.