Re: Accessing C++ class method from ObjC++ code
Re: Accessing C++ class method from ObjC++ code
- Subject: Re: Accessing C++ class method from ObjC++ code
- From: Charles Hamel <email@hidden>
- Date: Sun, 18 Nov 2007 14:50:40 -0500
The definition is exactly the same, I copied/pasted it just to be sure.
No namespaces involved.
I understand the nature of the error, it really looks like somehow the
linker doesn't see the analyze method implementation in Vision.mm,
even if it is included in the target.
What I don't get is that AppController.mm compiles fine, it even
highlights the vision->analyze(...) statement, so it knows it is a
valid symbol right ?
I have read the Apple doc many time now and I don't get what's
missing, is there a way to force the linker with some kind of extern
statement in my case ?
Thank you
Charles
On 18-Nov-07, at 1:43 PM, stephen joseph butler wrote:
On Nov 18, 2007 12:31 PM, Charles Hamel <email@hidden> wrote:
Sorry for the confusion
n/p
Get Info on Vision.mm, then Targets Tab, check the box.
Okay. Are namespaces involved? Are you sure the function signature
matches? If your header is this:
class Vision {
public: void analyze(NSMutableArray* a);
};
Then your implementation needs to be this:
void Vision::analyze(NSMutableArray* a);
Basically, your error message is telling us something quite simple.
The linker can't find the implementation of the function you declared
in the header. Usually this means one of two things:
1) The implementation file isn't in the target. But it looks like it
is.
2) The function signature for the implementation doesn't match the
declaration.
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