operator<= (hash_map)

Tests if the hash_map object on the left side of the operator is less than or equal to the hash_map object on the right side.

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

Parameters

• _Left
  An object of type hash_map.

• _Right
  An object of type hash_map.

Return Value

true if the hash_map on the left side of the operator is less than or equal to the hash_map on the right side of the operator; otherwise false.

Remark

The comparison between hash_map objects is based on a pairwise comparison of their elements. The less than or equal to 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_map_op_le.cpp
// compile with: /EHsc
#define _DEFINE_DEPRECATED_HASH_CLASSES 0
#include <hash_map>
#include <iostream>

int main( )
{
   using namespace std;
   using namespace stdext;
   hash_map <int, int> hm1, hm2, hm3, hm4;
   int i;
   typedef pair <int, int> Int_Pair;

   for ( i = 1 ; i < 3 ; i++ )
   {
      hm1.insert ( Int_Pair ( i, i ) );
      hm2.insert ( Int_Pair ( i, i * i ) );
      hm3.insert ( Int_Pair ( i, i - 1 ) );
      hm4.insert ( Int_Pair ( i, i ) );
   }

   if ( hm1 <= hm2 )
      cout << "The hash_map hm1 is less than or equal to the hash_map hm2." << endl;
   else
      cout << "The hash_map hm1 is greater than the hash_map hm2." << endl;

   if ( hm1 <= hm3 )
      cout << "The hash_map hm1 is less than or equal to the hash_map hm3." << endl;
   else
      cout << "The hash_map hm1 is greater than the hash_map hm3." << endl;

   if ( hm1 <= hm4 )
      cout << "The hash_map hm1 is less than or equal to the hash_map hm4." << endl;
   else
      cout << "The hash_map hm1 is greater than the hash_map hm4." << endl;
}

The hash_map hm1 is less than or equal to the hash_map hm2.
The hash_map hm1 is greater than the hash_map hm3.
The hash_map hm1 is less than or equal to the hash_map hm4.

Requirements

Header: <hash_map>

Namespace: stdext

See Also

Concepts

<hash_map> Members

Standard Template Library