How to create a variable length array/vector of String ^ in VC++

Question

I'm trying to create a vector of System::String ^, I tried using the straight up STL vector, but vector<String ^> my_vector gives a C4439 error (function needs to have a __clrcall calling convention.

So, I added __clrcall to my function prototype, and it still complained about my declaration of vector<String ^>.

I'm also reading through the MSDN pages on the VC++ library, but I haven't found what I need yet, anybody out there know what I need? Thanks.

Answer 1

You're trying to put a managed object (the String) under control of an unmanaged object, but the managed heap can move things around in memory and that's a problem for the vector. Basically, you can't stick managed objects into STL containers, though it may be allowed in managed C++ with pinning (I haven't tried that) and getting the actual char * out of it.

However, .NET provides similar classes such as the List<T> generic that will do the same thing for you, but in managed code. If you're on an older version of .NET, look at something like ArrayList, Stack, or Queue.