Re: Objective C++ from Objective C
Re: Objective C++ from Objective C
- Subject: Re: Objective C++ from Objective C
- From: James Trankelson <email@hidden>
- Date: Tue, 3 Feb 2009 02:19:12 +0100
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@hidden> 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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