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operator_subtraction.hpp
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1 #ifndef STAN_MATH_FWD_CORE_OPERATOR_SUBTRACTION_HPP
2 #define STAN_MATH_FWD_CORE_OPERATOR_SUBTRACTION_HPP
3
4 #include <stan/math/fwd/core/fvar.hpp>
5
6 namespace stan {
7 namespace math {
8
9 template <typename T>
10 inline
11 fvar<T>
12 operator-(const fvar<T>& x1, const fvar<T>& x2) {
13 return fvar<T>(x1.val_ - x2.val_, x1.d_ - x2.d_);
14 }
15
16 template <typename T>
17 inline
18 fvar<T>
19 operator-(const double x1, const fvar<T>& x2) {
20 return fvar<T>(x1 - x2.val_, -x2.d_);
21 }
22
23 template <typename T>
24 inline
25 fvar<T>
26 operator-(const fvar<T>& x1, const double x2) {
27 return fvar<T>(x1.val_ - x2, x1.d_);
28 }
29 }
30 }
31 #endif
stan::math::operator-
fvar< T > operator-(const fvar< T > &x1, const fvar< T > &x2)
Definition: operator_subtraction.hpp:12
stan::math::fvar::d_
T d_
Definition: fvar.hpp:14
stan
Definition: log_sum_exp.hpp:8
stan::math::fvar::val_
T val_
Definition: fvar.hpp:13
fvar.hpp
stan::math::fvar
Definition: fvar.hpp:12

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