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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
7 namespace stan {
8
9 namespace math {
10
11 template <typename T>
12 inline
13 fvar<T>
14 operator-(const fvar<T>& x1, const fvar<T>& x2) {
15 return fvar<T>(x1.val_ - x2.val_, x1.d_ - x2.d_);
16 }
17
18 template <typename T>
19 inline
20 fvar<T>
21 operator-(const double x1, const fvar<T>& x2) {
22 return fvar<T>(x1 - x2.val_, -x2.d_);
23 }
24
25 template <typename T>
26 inline
27 fvar<T>
28 operator-(const fvar<T>& x1, const double x2) {
29 return fvar<T>(x1.val_ - x2, x1.d_);
30 }
31 }
32 }
33 #endif
stan::math::operator-
fvar< T > operator-(const fvar< T > &x1, const fvar< T > &x2)
Definition: operator_subtraction.hpp:14
stan::math::fvar::d_
T d_
Definition: fvar.hpp:15
stan::math::fvar::val_
T val_
Definition: fvar.hpp:14
fvar.hpp
stan::math::fvar
Definition: fvar.hpp:13

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