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operator== (hash_multimap)

operator== (hash_multimap)

Note Note

This API is obsolete. The alternative is unordered_multimap Class.

Tests if the hash_multimap object on the left side of the operator is equal to the hash_multimap object on the right side.

bool operator==( 
   const hash_multimap <Key, Type, Traits, Allocator>& _Left, 
   const hash_multimap <Key, Type, Traits, Allocator>& _Right 
);

_Left

An object of type hash_multimap.

_Right

An object of type hash_multimap.

true if the hash_multimap on the left side of the operator is equal to the hash_multimap on the right side of the operator; otherwise false.

The comparison between hash_multimap objects is based on a pairwise comparison of their elements. Two hash_multimaps are equal if they have the same number of elements and their respective elements have the same values. Otherwise, they are unequal.

In Visual C++ .NET 2003, members of the <hash_map> and <hash_set> header files are no longer in the std namespace, but rather have been moved into the stdext namespace. See The stdext Namespace for more information.

// hash_multimap_op_eq.cpp
// compile with: /EHsc
#include <hash_map>
#include <iostream>

int main( )
{
   using namespace std;
   using namespace stdext;
   hash_multimap<int, int> hm1, hm2, hm3;
   int i;
   typedef pair<int, int> Int_Pair;

   for (i = 0; i < 3; i++)
   {
      hm1.insert(Int_Pair(i, i));
      hm2.insert(Int_Pair(i, i*i));
      hm3.insert(Int_Pair(i, i));
   }

   if ( hm1 == hm2 )
      cout << "The hash_multimaps hm1 and hm2 are equal." << endl;
   else
      cout << "The hash_multimaps hm1 and hm2 are not equal." << endl;

   if ( hm1 == hm3 )
      cout << "The hash_multimaps hm1 and hm3 are equal." << endl;
   else
      cout << "The hash_multimaps hm1 and hm3 are not equal." << endl;
}
The hash_multimaps hm1 and hm2 are not equal.
The hash_multimaps hm1 and hm3 are equal.

Header: <hash_map>

Namespace: stdext

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