"Thorsten Ottosen" <tottosen@dezide.com> wrote in message news:drsf4g$hob$1@sea.gmane.org...
Michael Goldshteyn wrote:
Thorsten, the biggest problem I have found with libraries that offer this optimization, and I am glad that VC++ 7.1's is one of them, is that the definition of "short" is non-configurable, except by changing a very important header file. Even if a change to that header file is made, there is no guarantee that the compiler actually reads the header file and does not have its contents hardcoded when an include directive for that header file is seen in source code, since the header file is a "standard" (i.e. included with the compiler) header file.
For example, in VC++, IIRC, it is set to somewhere in the neighborhood of 15. I would much rather that they upped this value to 31 or 63, or somewhere thereabouts.
maybe std::char_traits could container such a constant?
-Thorsten
It's hard to say, but whatever the place chosen it should be compatible with similar extensions to other containers: - vector (i.e. how does it scale as the reserve is exceeded?) - deque (i.e. how can the page size be set by the programmer?) - hash_* (i.e. how can an initial hash table size be reserved? how does it grow when the reserve is exceeded?) So, in this light, perhaps char_traits isn't the right place, but I am not sure what is, short of adding another template parameter to specify a growth/initial_size policy. Michael Goldshteyn