Chris Newbold skrev:
Greetings. I've been wrestling with some legacy C code which makes heavy use of raw arrays of pointers-- typically pointers to quasi-OO C structures which have specific "constructor" and "destructor" functions. The problem I'm having is how to couple ptr_vector to the legacy code which expects to use arrays of pointers. Here's what I'd like to do:
bool Wrapper(StuffVec_t& output, size_t count, ...) { // Won't work: resize() isn't supported output.resize(count);
This seems to be an oversight as the function should be available if the container allows nulls, as your's does. What you can do for now is to roll your own using push_back()/erase().
// Won't work: no way to get to raw storage return FiddleWithStuff(&output[0], count, ...); }
Well, it's ugly, but you can do something along
reinterpret_cast
As noted, this won't work for a couple of reasons. The pointer containers have an aversion to containing NULL pointers, which is why I imagine resize() isn't supported. And there's no way to get a pointer to the raw storage for the pointers to provide a buffer for the legacy code to write into.
I do understand why the pointer containers don't support what I'm trying to do here, and the restrictions are entirely reasonable to provide additional safety. But...
I'm working on better C-array integration for the next release. -Thorsten