NumCpp  2.11.0
A Templatized Header Only C++ Implementation of the Python NumPy Library
expint.hpp
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1 #pragma once
29 
30 #include <cmath>
31 
32 #if defined(__cpp_lib_math_special_functions) || !defined(NUMCPP_NO_USE_BOOST)
33 
36 #include "NumCpp/NdArray.hpp"
37 
38 #ifndef __cpp_lib_math_special_functions
39 #include "boost/math/special_functions/expint.hpp"
40 #endif
41 
42 #include <type_traits>
43 
44 namespace nc::special
45 {
46  //============================================================================
47  // Method Description:
55  template<typename dtype>
56  auto expint(dtype inX)
57  {
59 
60 #ifdef __cpp_lib_math_special_functions
61  return std::expint(inX);
62 #else
63  return boost::math::expint(inX);
64 #endif
65  }
66 
67  //============================================================================
68  // Method Description:
76  template<typename dtype>
77  auto expint(const NdArray<dtype>& inArrayX)
78  {
79  NdArray<decltype(expint(dtype{ 0 }))> returnArray(inArrayX.shape());
80 
82  inArrayX.cbegin(),
83  inArrayX.cend(),
84  returnArray.begin(),
85  [](dtype inX) -> auto{ return expint(inX); });
86 
87  return returnArray;
88  }
89 } // namespace nc::special
90 
91 #endif // #if defined(__cpp_lib_math_special_functions) || !defined(NUMCPP_NO_USE_BOOST)
#define STATIC_ASSERT_ARITHMETIC(dtype)
Definition: StaticAsserts.hpp:39
Holds 1D and 2D arrays, the main work horse of the NumCpp library.
Definition: NdArrayCore.hpp:138
const_iterator cbegin() const noexcept
Definition: NdArrayCore.hpp:1318
const_iterator cend() const noexcept
Definition: NdArrayCore.hpp:1626
iterator begin() noexcept
Definition: NdArrayCore.hpp:1268
const Shape & shape() const noexcept
Definition: NdArrayCore.hpp:4464
Definition: airy_ai.hpp:39
auto expint(dtype inX)
Definition: expint.hpp:56
auto expint(const NdArray< dtype > &inArrayX)
Definition: expint.hpp:77
OutputIt transform(InputIt first, InputIt last, OutputIt destination, UnaryOperation unaryFunction)
Definition: StlAlgorithms.hpp:775