Re: STL removal algorithm question

From:
"Old Wolf" <oldwolf@inspire.net.nz>
Newsgroups:
comp.lang.c++
Date:
26 Apr 2006 20:19:47 -0700
Message-ID:
<1146107987.832724.250650@i39g2000cwa.googlegroups.com>
Dilip wrote:

Victor Bazarov wrote:

  struct MyStruct
  {
    BSTR somestring;
    BSTR someotherstring;
  };

vector<MyStruct> my_struct;


See, the problem is I simplified this struct a little too much. This
struct gets used across COM boundaries so I have to put it in a IDL
file and once I do that I don't think I can start adding ctors/dtors
and other stuff.


You will save a lot of headaches by not using this struct
anywhere, except in COM interface calls. If you need to
manipulate this data yourself, define your own struct, eg:
    struct ProperStruct { std::wstring some, someother; }
and include a functions to convert between a ProperStruct
and a MyStruct when it comes time to make an interface call.

I recommend this strategy for deleting strings: maintain a
separate container of all your BSTRs. When you've finished
with your vector, just destroy the vector normally. Then go
through the separate container and SysFreeString all of them.

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