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num_elements.hpp
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1 #ifndef STAN_MATH_PRIM_MAT_FUN_NUM_ELEMENTS_HPP
2 #define STAN_MATH_PRIM_MAT_FUN_NUM_ELEMENTS_HPP
3
4 #include <stan/math/prim/mat/fun/Eigen.hpp>
5 #include <vector>
6
7 namespace stan {
8 namespace math {
9
16 template <typename T>
17 inline int
18 num_elements(const T& x) {
19 return 1;
20 }
21
28 template <typename T, int R, int C>
29 inline int
30 num_elements(const Eigen::Matrix<T, R, C>& m) {
31 return m.size();
32 }
33
42 template <typename T>
43 inline int
44 num_elements(const std::vector<T>& v) {
45 if (v.size() == 0)
46 return 0;
47 return v.size() * num_elements(v[0]);
48 }
49
50 }
51 }
52 #endif
stan
Definition: log_sum_exp.hpp:8
Eigen.hpp
stan::math::num_elements
int num_elements(const T &x)
Returns 1, the number of elements in a primitive type.
Definition: num_elements.hpp:18

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