Belle II Software development
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.

51 {
52 Category cat1 = m_functor(t1);
53 Category cat2 = m_functor(t2);
54 if (cat1 == cat2) return {cat1};
55 return {};
56 }

◆ 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.

33 {
34 auto it = std::begin(ts);
35 auto itEnd = std::end(ts);
36 if (it == itEnd) return {}; // empty case
37 Category category = m_functor(*it);
38 for (; it != itEnd; ++it) {
39 if (category != m_functor(*it)) return {};
40 }
41 return {category};
42 }

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.


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