On Sep 17, 1:06 pm, Gianni Mariani <gi3nos...@mariani.wswrote:
DaveJ wrote:
This is quite a simple question (hopefully).
If I create a vector (on any container) on the heap e.g.
std::vector<std::string* m_VectorOfStrings = new
vector<std::string>;
I know that the vector itself will be placed on the heap, but if I
just add strings to it such as:
m_VectorOfStrings.push_back("mystring1");
Note that this whould be:
m_VectorOfStrings->push_back("mystring1");
(I can't quite see why one would ever allocate a vector member
dynamically, however.)
Will the string also be stored on the heap? Or do I need to create a
string with the new operator as well?
The string will be allocated using the default allocator for
std::basic_string, which more than likely uses heap.
The strings themselves will be allocated using the allocator of
the vector (which by default uses global operator new). Any
additional dynamic memory needed by the string will be allocated
by the allocator of string.
I assummed that any data stored inside a container on the
heap would also be stored on the heap, but just wanted to
clarify this.
They are independant.
More to the point, of course: the container manages any memory
it might need. It's not really your problem, unless you want to
play around with allocators.
--
James Kanze (GABI Software) email:ja*********@gmail.com
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