exprtk::rtl::vecops::sumk< T > Class Template Reference

#include <exprtk.hpp>

Inheritance diagram for exprtk::rtl::vecops::sumk< T >:

Collaboration diagram for exprtk::rtl::vecops::sumk< T >:

Public Types
typedef exprtk::igeneric_function< T >	igfun_t
typedef igfun_t::parameter_list_t	parameter_list_t
typedef igfun_t::generic_type	generic_type
typedef generic_type::scalar_view	scalar_t
typedef generic_type::vector_view	vector_t
Public Types inherited from exprtk::igeneric_function< T >
enum	return_type { e_rtrn_scalar = 0 , e_rtrn_string = 1 , e_rtrn_overload = 2 }
typedef T	type
typedef type_store< T >	generic_type
typedef generic_type::parameter_list	parameter_list_t

Public Member Functions
	sumk ()
T	operator() (const std::size_t &ps_index, parameter_list_t parameters)
Public Member Functions inherited from exprtk::igeneric_function< T >
	igeneric_function (const std::string &param_seq="", const return_type rtr_type=e_rtrn_scalar)
virtual	~igeneric_function ()
virtual T	operator() (parameter_list_t)
virtual T	operator() (std::string &, parameter_list_t)
virtual T	operator() (const std::size_t &, std::string &, parameter_list_t)
Public Member Functions inherited from exprtk::function_traits
	function_traits ()
bool &	allow_zero_parameters ()
bool &	has_side_effects ()
std::size_t &	min_num_args ()
std::size_t &	max_num_args ()

Additional Inherited Members
Static Public Member Functions inherited from exprtk::igeneric_function< T >
static std::string	generate_prefix_args (const std::string &prefix_args, std::size_t start=0, std::size_t end=10)
static std::string	generate_suffix_args (const std::string &suffix_args, std::size_t start=0, std::size_t end=10)
Public Attributes inherited from exprtk::igeneric_function< T >
std::string	parameter_sequence
return_type	rtrn_type

Detailed Description

template<typename T>
class exprtk::rtl::vecops::sumk< T >

Definition at line 45608 of file exprtk.hpp.

Member Typedef Documentation

generic_type

template<typename T >

typedef igfun_t::generic_type exprtk::rtl::vecops::sumk< T >::generic_type

Definition at line 45614 of file exprtk.hpp.

igfun_t

template<typename T >

typedef exprtk::igeneric_function<T> exprtk::rtl::vecops::sumk< T >::igfun_t

Definition at line 45612 of file exprtk.hpp.

parameter_list_t

template<typename T >

typedef igfun_t::parameter_list_t exprtk::rtl::vecops::sumk< T >::parameter_list_t

Definition at line 45613 of file exprtk.hpp.

scalar_t

template<typename T >

typedef generic_type::scalar_view exprtk::rtl::vecops::sumk< T >::scalar_t

Definition at line 45615 of file exprtk.hpp.

vector_t

template<typename T >

typedef generic_type::vector_view exprtk::rtl::vecops::sumk< T >::vector_t

Definition at line 45616 of file exprtk.hpp.

Constructor & Destructor Documentation

sumk()

template<typename T >

exprtk::rtl::vecops::sumk< T >::sumk ( )

inline

Definition at line 45620 of file exprtk.hpp.

      : exprtk::igeneric_function<T>("V|VTT|VTTT")
        /*
           Overloads:
           0. V    - vector
           1. VTT  - vector, r0, r1
           2. VTTT - vector, r0, r1, stride
        */
      {}

Member Function Documentation

operator()()

template<typename T >

T exprtk::rtl::vecops::sumk< T >::operator() ( const std::size_t &  ps_index, parameter_list_t  parameters  )

inlinevirtual

Reimplemented from exprtk::igeneric_function< T >.

Definition at line 45630 of file exprtk.hpp.

      {
         const vector_t vec(parameters[0]);
 
         const std::size_t stride = (2 != ps_index) ? 1 :
                                    static_cast<std::size_t>(scalar_t(parameters[3])());
 
         std::size_t r0 = 0;
         std::size_t r1 = vec.size() - 1;
 
         if (
              ((1 == ps_index) || (2 == ps_index)) &&
              !helper::load_vector_range<T>::process(parameters, r0, r1, 1, 2, 0)
            )
         {
            return std::numeric_limits<T>::quiet_NaN();
         }
 
         T result = T(0);
         T error  = T(0);
 
         for (std::size_t i = r0; i <= r1; i += stride)
         {
            details::kahan_sum(result, error, vec[i]);
         }
 
         return result;
      }

References exprtk::rtl::vecops::details::kahan_sum(), exprtk::rtl::vecops::helper::load_vector_range< T >::process(), and exprtk::type_store< T >::type_view< ViewType >::size().

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The documentation for this class was generated from the following file:

• exprtk/exprtk.hpp