unordered_map::key_equal
The type of the comparison function.
typedef Pred key_equal;
Remarks
The type is a synonym for the template parameter Pred.
Example
// std_tr1__unordered_map__unordered_map_key_equal.cpp
// compile with: /EHsc
#include <unordered_map>
#include <iostream>
typedef std::unordered_map<char, int> Mymap;
int main()
{
Mymap c1;
Mymap::key_equal cmpfn = c1.key_eq();
std::cout << "cmpfn('a', 'a') == "
<< std::boolalpha << cmpfn('a', 'a') << std::endl;
std::cout << "cmpfn('a', 'b') == "
<< std::boolalpha << cmpfn('a', 'b') << std::endl;
return (0);
}
cmpfn('a', 'a') == true
cmpfn('a', 'b') == false
Requirements
Header: <unordered_map>
Namespace: std