public member function
std::map::get_allocator
<map>
allocator_type get_allocator() const;
Get allocator
Returns the allocator object used to construct the container.
Parameters
none
Return Value
The allocator.
Member type
allocator_type is defined to the same as the fourth template parameter used to instantitate this specific map class (its
Allocator type).
Example
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// map::get_allocator
#include <iostream>
#include <map>
using namespace std;
int main ()
{
int psize;
map<char,int> mymap;
pair<const char,int>* p;
// allocate an array of 5 elements using mymap's allocator:
p=mymap.get_allocator().allocate(5);
// assign some values to array
psize = (int) sizeof(map<char,int>::value_type)*5;
cout << "The allocated array has a size of " << psize << " bytes.\n";
mymap.get_allocator().deallocate(p,5);
return 0;
}
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The example shows an elaborate way to allocate memory for an array of pairs using the same allocator used by the container.
A possible output is:
The allocated array has a size of 40 bytes.
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Complexity
Constant.