This code works for me. Can you see any fundamental difference between
it and what you have? It compiles with no error or warnings and it
logs "The list contains 1 items" when run.
//ObjCPPController.m
#import "ObjCPPController.h"
#import "SomeObjCPPClass.h"
@implementation ObjCPPController
- (IBAction) createACPPObject:(id)sender
{
SomeObjCPPClass* cppClass = [[SomeObjCPPClass alloc] init];
[cppClass release];
}
// SomeObjCPPClass.mm
#import "SomeObjCPPClass.h"
#include <list>
@implementation SomeObjCPPClass
- (id)init
{
self = [super init];
if (self)
{
std::list<int> temp;
temp.push_back(42);
NSLog(@"The list contains %d item(s)", temp.size());
}
return self;
}
On Feb 2, 2009, at 5:19 PM, James Trankelson wrote:
I guess I should have been more clear.
My Objective C++ file is named with an .mm extension. The
"sourcecode.cpp.objcpp" specification is the XCode setting that tells
the compiler how to treat the file.
jim
On Tue, Feb 3, 2009 at 2:16 AM, Wayne Packard <[email protected]>
wrote:
Hi,
The build system uses the file extension of the source file to
determine how
to treat the code in the file. .m files get treated as Objective-C
(by
default). .mm files get treated as Objective-C++. Try renaming
your source
code file from sourcecode.cpp.objcpp to sourcecode.mm and see if
you get
better results.
wp
On Feb 2, 2009, at 5:08 PM, James Trankelson wrote:
Hi,
For the majority of my OS X programming life, I've been using
Objective C exclusively. However, I now have a reason to want to use
some C++ standard template libraries, and have started looking into
Objective C++. I've found the documentation on Objective C++
lacking,
and was hoping if someone could just show me how I can accomplish
the
following:
From an Objective C class, allocate an object that can contain
references to C++ standard template libraries.
For example:
#include "OCPP_Class.h"
@implementation OC_Class
-(void) foo {
OCPP_Class *bar = [[OCPP_Class alloc] init];
}
@end
@implementation OCPP_Class
-(id) init
{
std::list<int> temp;
}
@end
When I try to compile this (with the latter compiled as
sourcecode.cpp.objcpp), the compiler complains about the reference
in
the OC_Class where I allocate my object. Something about the first
parameter being of the wrong pointer type.
While this sounds like something I might suspect with C++ trying to
send the this pointer, I have no idea how to get around this, or how
to fix it. Can anyone point me in the right direction?
Thanks.
-jim
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