count()

template<typename _InputIterator, typename _Tp, typename _Size>

void __gnu_cxx::count	(	_InputIterator	__first,
		_InputIterator	__last,
		const _Tp &	__value,
		_Size &	__n )

Definition at line 221 of file ext/algorithm.

    {
      // concept requirements
      __glibcxx_function_requires(_InputIteratorConcept<_InputIterator>)
      __glibcxx_function_requires(_EqualityComparableConcept<
          typename std::iterator_traits<_InputIterator>::value_type >)
      __glibcxx_function_requires(_EqualityComparableConcept<_Tp>)
      __glibcxx_requires_valid_range(__first, __last);
 
      for ( ; __first != __last; ++__first)
      if (*__first == __value)
        ++__n;
    }

References __glibcxx_function_requires, and __glibcxx_requires_valid_range.