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fabs.hpp
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1#ifndef STAN_MATH_PRIM_FUN_FABS_HPP
2#define STAN_MATH_PRIM_FUN_FABS_HPP
3
8#include <cmath>
9
10namespace stan {
11namespace math {
12
13template <typename T, require_arithmetic_t<T>* = nullptr>
14inline auto fabs(T x) {
15 return std::abs(x);
16}
17
18template <typename T, require_complex_t<T>* = nullptr>
19inline auto fabs(T x) {
20 return std::hypot(x.real(), x.imag());
21}
22
30struct fabs_fun {
31 template <typename T>
32 static inline auto fun(const T& x) {
33 return fabs(x);
34 }
35};
36
45template <typename Container,
49 Container>* = nullptr,
51inline auto fabs(const Container& x) {
53}
54
63template <typename Container,
65inline auto fabs(const Container& x) {
67 x, [](const auto& v) { return v.array().abs(); });
68}
69
70} // namespace math
71} // namespace stan
72
73#endif
require_not_t< container_type_check_base< is_container, scalar_type_t, TypeCheck, Check... > > require_not_container_st
Require type does not satisfy is_container.
require_t< container_type_check_base< is_container, scalar_type_t, TypeCheck, Check... > > require_container_st
Require type satisfies is_container.
require_all_not_t< is_nonscalar_prim_or_rev_kernel_expression< std::decay_t< Types > >... > require_all_not_nonscalar_prim_or_rev_kernel_expression_t
Require none of the types satisfy is_nonscalar_prim_or_rev_kernel_expression.
require_not_t< is_stan_scalar< std::decay_t< T > > > require_not_stan_scalar_t
Require type does not satisfy is_stan_scalar.
require_not_t< is_var_matrix< std::decay_t< T > > > require_not_var_matrix_t
Require type does not satisfy is_var_matrix.
fvar< T > abs(const fvar< T > &x)
Definition abs.hpp:15
fvar< T > fabs(const fvar< T > &x)
Definition fabs.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(const T &x)
Definition fabs.hpp:32
Structure to wrap fabs() so that it can be vectorized.
Definition fabs.hpp:30