Alternation< AFunctor1, AFunctor2 > Struct Template Reference

Generic functor to try to functors and choose the first to be applicable. More...

#include <Functional.h>

Public Member Functions
	operator FunctorTag ()
	Marker function for the isFunctor test.
	Alternation ()=default
	Allow default construction.
	Alternation (const AFunctor1 &functor1, const AFunctor2 &functor2=AFunctor2())
	Constructor from the nested functors.
template<class... T>
auto	impl (int favouredTag, T &&... t) const -> decltype(m_functor1(std::forward< T >(t)...))
	Implementation applying the first functor. Favoured option.
template<class... T>
auto	impl (long disfavouredTag, T &&... t) const -> decltype(m_functor2(std::forward< T >(t)...))
	Implementation applying the second functor. Disfavoured option.
template<class... T>
auto	operator() (T &&... t) const -> decltype(this->impl(0, std::forward< T >(t)...))
	Operator to dispatch to the two functors and returns the first applicable option.

Private Attributes
AFunctor1	m_functor1
	Memory for the first nested functor.
AFunctor2	m_functor2
	Memory for the second nested functor.

Detailed Description

template<class AFunctor1, class AFunctor2>
struct Belle2::TrackFindingCDC::Alternation< AFunctor1, AFunctor2 >

Generic functor to try to functors and choose the first to be applicable.

Definition at line 180 of file Functional.h.

Constructor & Destructor Documentation

Alternation()

Alternation ( const AFunctor1 &  functor1, const AFunctor2 &  functor2 = AFunctor2()  )

inlineexplicit

Constructor from the nested functors.

Definition at line 198 of file Functional.h.

        : m_functor1(functor1)
        , m_functor2(functor2)
      {
      }

Member Function Documentation

impl() [1/2]

auto impl ( int  favouredTag, T &&...  t  ) const -> decltype(m_functor1(std::forward<T>(t)...))

inline

Implementation applying the first functor. Favoured option.

Definition at line 207 of file Functional.h.

      {
        return m_functor1(std::forward<T>(t)...);
      }

impl() [2/2]

auto impl ( long  disfavouredTag, T &&...  t  ) const -> decltype(m_functor2(std::forward<T>(t)...))

inline

Implementation applying the second functor. Disfavoured option.

Definition at line 215 of file Functional.h.

      {
        return m_functor2(std::forward<T>(t)...);
      }

operator()()

auto operator() ( T &&...  t ) const -> decltype(this->impl(0, std::forward<T>(t)...))

inline

Operator to dispatch to the two functors and returns the first applicable option.

Definition at line 224 of file Functional.h.

      {
        int dispatchTag = 0;
        return impl(dispatchTag, std::forward<T>(t)...);
      }

Member Data Documentation

m_functor1

AFunctor1 m_functor1

private

Memory for the first nested functor.

Definition at line 188 of file Functional.h.

m_functor2

AFunctor2 m_functor2

private

Memory for the second nested functor.

Definition at line 191 of file Functional.h.

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

• tracking/trackFindingCDC/utilities/include/Functional.h