Common< AFunctor > Struct Template Reference

Adapter of a category function to find the common category of several objects. More...

#include <Common.h>

Public Member Functions
template<class Ts, class Category = decltype(m_functor(*std::declval<Ts>().begin()))>
std::optional< Category >	operator() (const Ts &ts) const
	Returns the common category value of a range.
template<class T1, class T2, class Category = decltype(m_functor(std::declval<T1>()))>
std::optional< Category >	operator() (const T1 &t1, const T2 &t2) const
	Returns the common category of two values.

Private Attributes
AFunctor	m_functor
	Memory for the nested functor.

Detailed Description

template<class AFunctor>
struct Belle2::TrackFindingCDC::Common< AFunctor >

Adapter of a category function to find the common category of several objects.

Definition at line 19 of file Common.h.

Member Function Documentation

operator()() [1/2]

template<class AFunctor>

template<class T1, class T2, class Category = decltype(m_functor(std::declval<T1>()))>

std::optional< Category > operator() ( const T1 & t1, const T2 & t2 ) const

inline

Returns the common category of two values.

In case the category value differ between the values return empty optional

Definition at line 50 of file Common.h.

      {
        Category cat1 = m_functor(t1);
        Category cat2 = m_functor(t2);
        if (cat1 == cat2) return {cat1};
        return {};
      }

operator()() [2/2]

template<class AFunctor>

template<class Ts, class Category = decltype(m_functor(*std::declval<Ts>().begin()))>

std::optional< Category > operator() ( const Ts & ts ) const

inline

Returns the common category value of a range.

In case the category value differ between the values return empty optional.

Definition at line 32 of file Common.h.

      {
        auto it = std::begin(ts);
        auto itEnd = std::end(ts);
        if (it == itEnd) return {}; // empty case
        Category category = m_functor(*it);
        for (; it != itEnd; ++it) {
          if (category != m_functor(*it)) return {};
        }
        return {category};
      }

Member Data Documentation

m_functor

template<class AFunctor>

AFunctor m_functor

private

Memory for the nested functor.

Definition at line 23 of file Common.h.

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

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