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operator< (hash_multiset)

Tests if the hash_multiset object on the left side of the operator is less than the hash_multiset object on the right side.

bool operator<(
   const hash_multiset <Key, Traits, Allocator>& _Left,
   const hash_multiset <Key, Traits, Allocator>& _Right
);

Parameters

  • _Left
    An object of type hash_multiset.

  • _Right
    An object of type hash_multiset.

Return Value

true if the hash_multiset on the left side of the operator is strictly less than the hash_multiset on the right side of the operator; otherwise false.

Remarks

The comparison between hash_multiset objects is based on a pairwise comparison of their elements. The less-than relationship between two objects is based on a comparison of the first pair of unequal elements.

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.

Example

// hash_set_multiset_op_lt.cpp
// compile with: /EHsc
#define _DEFINE_DEPRECATED_HASH_CLASSES 0
#include <hash_set>
#include <iostream>

int main( ) 
{
   using namespace std;
   using namespace stdext;
   hash_multiset <int> hs1, hs2, hs3;
   int i;

   for ( i = 0 ; i < 3 ; i++ )
   {
      hs1.insert ( i );
      hs2.insert ( i * i );
      hs3.insert ( i - 1 );
   }

   if ( hs1 < hs2 )
      cout << "The hash_multiset hs1 is less than "
           << "the hash_multiset hs2." << endl;
   else
      cout << "The hash_multiset hs1 is not less than "
           << "the hash_multiset hs2." << endl;

   if ( hs1 < hs3 )
      cout << "The hash_multiset hs1 is less than "
           << "the hash_multiset hs3." << endl;
   else
      cout << "The hash_multiset hs1 is not less than "
           << "the hash_multiset hs3." << endl;
}

The hash_multiset hs1 is less than the hash_multiset hs2.
The hash_multiset hs1 is not less than the hash_multiset hs3.

Requirements

Header: <hash_set>

Namespace: stdext

See Also

Concepts

<hash_set> Members

Standard Template Library