Automatic Differentiation
 
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tan.hpp
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1#ifndef STAN_MATH_PRIM_FUN_TAN_HPP
2#define STAN_MATH_PRIM_FUN_TAN_HPP
3
10#include <cmath>
11#include <complex>
12
13namespace stan {
14namespace math {
15
23template <typename T, require_arithmetic_t<T>* = nullptr>
24inline auto tan(T&& x) {
25 return std::tan(x);
26}
27
35template <typename T, require_complex_bt<std::is_arithmetic, T>* = nullptr>
36inline auto tan(T&& x) {
37 return std::tan(x);
38}
39
47struct tan_fun {
48 template <typename T>
49 static inline auto fun(T&& x) {
50 return tan(std::forward<T>(x));
51 }
52};
53
61template <typename Container, require_ad_container_t<Container>* = nullptr>
62inline auto tan(Container&& x) {
64 std::forward<Container>(x));
65}
66
75template <typename Container,
77inline auto tan(Container&& x) {
78 return apply_vector_unary<Container>::apply(
79 std::forward<Container>(x), [](auto&& v) { return v.array().tan(); });
80}
81
82namespace internal {
90template <typename V>
91inline std::complex<V> complex_tan(const std::complex<V>& z) {
92 return neg_i_times(tanh(i_times(z)));
93}
94} // namespace internal
95
96} // namespace math
97} // namespace stan
98
99#endif
require_t< container_type_check_base< is_container, base_type_t, TypeCheck, Check... > > require_container_bt
Require type satisfies is_container.
std::complex< V > complex_tan(const std::complex< V > &z)
Return the tangent of the complex argument.
Definition tan.hpp:91
std::complex< T > i_times(const std::complex< T > &z)
Return the specified complex number multiplied by i.
Definition i_times.hpp:20
std::complex< T > neg_i_times(const std::complex< T > &z)
Return the specified complex number multiplied by -i.
Definition i_times.hpp:36
fvar< T > tan(const fvar< T > &x)
Definition tan.hpp:16
fvar< T > tanh(const fvar< T > &x)
Definition tanh.hpp:15
The lgamma implementation in stan-math is based on either the reentrant safe lgamma_r implementation ...
Base template class for vectorization of unary scalar functions defined by a template class F to a sc...
static auto fun(T &&x)
Definition tan.hpp:49
Structure to wrap tan() so that it can be vectorized.
Definition tan.hpp:47