PointerComparator< Cmp > Struct Template Reference

Wrapper that takes a comparator for `something' and makes a comparator for pointers to `something' out of it. Normally you should use the make-function pointerComparator() because then you do not need to specify the template arguments. More...

#include <OpenMS/KERNEL/ComparatorUtils.h>

Inheritance diagram for PointerComparator< Cmp >:

Collaboration diagram for PointerComparator< Cmp >:

Public Member Functions
	PointerComparator (PointerComparator const &pCmp)
	PointerComparator (Cmp const &cmp=Cmp())
template<typename T1 , typename T2 >
Cmp::result_type	operator() (T1 left, T2 right) const

Protected Attributes
const Cmp &	cmp_

Related Functions
(Note that these are not member functions.)
template<class Cmp >
PointerComparator< Cmp >	pointerComparator (Cmp const &cmp)
	Make-function to create a PointerComparator from another comparator without the need to specify the template arguments. More...

Detailed Description

template<class Cmp>
struct OpenMS::PointerComparator< Cmp >

Wrapper that takes a comparator for `something' and makes a comparator for pointers to `something' out of it. Normally you should use the make-function pointerComparator() because then you do not need to specify the template arguments.

This works by dereferencing the arguments (unary operator*) before comparing them.
E.g. you can use

PointerComparator<Peak1D::IntensityLess> to compare Peak1D* in the same way as Peak1D::IntensityLess works for Peak1D .

Constructor & Destructor Documentation

PointerComparator() [1/2]

PointerComparator ( PointerComparator< Cmp > const &  pCmp )

inline

PointerComparator() [2/2]

PointerComparator ( Cmp const &  cmp = Cmp() )

inline

Member Function Documentation

operator()()

Cmp::result_type operator() ( T1  left, T2  right  ) const

inline

References PointerComparator< Cmp >::cmp_.

Friends And Related Function Documentation

pointerComparator()

PointerComparator< Cmp > pointerComparator ( Cmp const &  cmp )

related

Make-function to create a PointerComparator from another comparator without the need to specify the template arguments.

For example,

int i = 88, j = 99;
if ( pointerComparator(std::less<int>())(&i,&j) )
{
  //    // yes, 88 < 99.
}

Member Data Documentation

cmp_

const Cmp& cmp_

protected

Referenced by PointerComparator< Cmp >::operator()().