operator< (hash_multimap)
Tests if the hash_multimap object on the left side of the operator is less than 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
);
Parameters
_Left
An object of type hash_multimap._Right
An object of type hash_multimap.
Return Value
true if the hash_multimap on the left side of the operator is strictly less than the hash_multimap on the right side of the operator; otherwise false.
Remarks
The comparison between hash_multimap 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_multimap_op_lt.cpp
// compile with: /EHsc
#define _DEFINE_DEPRECATED_HASH_CLASSES 0
#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 = 1 ; i < 3 ; i++ )
{
hm1.insert ( Int_Pair ( i, i ) );
hm2.insert ( Int_Pair ( i, i * i ) );
hm3.insert ( Int_Pair ( i, i - 1 ) );
}
if ( hm1 < hm2 )
cout << "The hash_multimap hm1 is less than the hash_multimap hm2." << endl;
else
cout << "The hash_multimap hm1 is not less than the hash_multimap hm2." << endl;
if ( hm1 < hm3 )
cout << "The hash_multimap hm1 is less than the hash_multimap hm3." << endl;
else
cout << "The hash_multimap hm1 is not less than the hash_multimap hm3." << endl;
}
The hash_multimap hm1 is less than the hash_multimap hm2. The hash_multimap hm1 is not less than the hash_multimap hm3.
Requirements
Header: <hash_map>
Namespace: stdext