HLT::UniqueCombinationGenerator Class Reference

Generator of unique combinations (no indices are repeated) API description. More...

#include <Combinators.h>

Collaboration diagram for HLT::UniqueCombinationGenerator:

Public Member Functions
	UniqueCombinationGenerator (size_t nelems, size_t comblen)
void	reset ()
size_t	size () const
const std::vector< size_t > &	operator() () const
const std::vector< size_t > &	current () const
void	operator++ ()
	operator bool () const

Private Attributes
size_t	m_nElements
size_t	m_combLen
std::vector< size_t >	m_current
std::vector< bool >	m_bitmask

Detailed Description

Generator of unique combinations (no indices are repeated) API description.

See also

CombinationGenerator

Definition at line 51 of file TrigCompositeUtils/TrigCompositeUtils/Combinators.h.

Constructor & Destructor Documentation

UniqueCombinationGenerator()

UniqueCombinationGenerator::UniqueCombinationGenerator	(	size_t	nelems,
		size_t	comblen
	)

Definition at line 44 of file Combinators.cxx.

  : m_nElements(nelems),
  m_combLen(comblen),
  m_current(m_combLen) { 
    reset(); 
  }

Member Function Documentation

current()

const std::vector<size_t>& HLT::UniqueCombinationGenerator::current ( ) const

inline

Definition at line 57 of file TrigCompositeUtils/TrigCompositeUtils/Combinators.h.

{ return m_current; }

operator bool()

UniqueCombinationGenerator::operator bool

(

)

const

Definition at line 63 of file Combinators.cxx.

                                                {
  return not m_current.empty();
}

operator()()

const std::vector<size_t>& HLT::UniqueCombinationGenerator::operator() ( ) const

inline

Definition at line 56 of file TrigCompositeUtils/TrigCompositeUtils/Combinators.h.

{ return current(); }

operator++()

void UniqueCombinationGenerator::operator++

(

)

Definition at line 67 of file Combinators.cxx.

                                            {
  if ( m_current.empty() )  return;  
 
  const bool exists = std::prev_permutation( m_bitmask.begin(), m_bitmask.end());
  if ( exists ) {
    m_current.clear();
    for (size_t i = 0; i < m_nElements; ++i) {
      if ( m_bitmask[i] )
        m_current.push_back(i);
    }
    return;
  }
  m_current.clear();
}

reset()

void UniqueCombinationGenerator::reset

(

)

Definition at line 56 of file Combinators.cxx.

                                       {
  m_bitmask.resize(m_combLen, true);
  m_bitmask.resize(m_nElements, false);
  m_current.resize(m_combLen);
  std::iota(m_current.begin(), m_current.end(), 0);
}

size()

size_t HLT::UniqueCombinationGenerator::size ( ) const

inline

Definition at line 55 of file TrigCompositeUtils/TrigCompositeUtils/Combinators.h.

{ return m_combLen; }

Member Data Documentation

m_bitmask

std::vector<bool> HLT::UniqueCombinationGenerator::m_bitmask

private

Definition at line 65 of file TrigCompositeUtils/TrigCompositeUtils/Combinators.h.

m_combLen

size_t HLT::UniqueCombinationGenerator::m_combLen

private

Definition at line 63 of file TrigCompositeUtils/TrigCompositeUtils/Combinators.h.

m_current

std::vector<size_t> HLT::UniqueCombinationGenerator::m_current

private

Definition at line 64 of file TrigCompositeUtils/TrigCompositeUtils/Combinators.h.

m_nElements

size_t HLT::UniqueCombinationGenerator::m_nElements

private

Definition at line 62 of file TrigCompositeUtils/TrigCompositeUtils/Combinators.h.

---

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

• TrigCompositeUtils/TrigCompositeUtils/Combinators.h
• Combinators.cxx