On Thu, May 6, 2010 at 2:19 AM, Barry Wark <barryw...@gmail.com> wrote:
> I'm no C++ guru, so I'm hoping someone can help me by explaining why
> the following gives a compiler error:
I'm no guru either, but my guess would be that the interaction between
synthesized ivars and C++ templates is rocky territory. I avoid going
down that path, declare the ivar as a pointer (with an #ifdef to
declare it as a void* for ObjC client code) and create the object with
new in +init. Here's a snippet from a random number generator class I
wrote, that uses Boost's random module "under the hood":
In SPRandom.h:
#ifdef __cplusplus
#import <boost/random.hpp>
#endif
typedef struct {
int min;
int max;
} SPRandomRange;
@interface SPRandom : NSObject {
#ifdef __cplusplus
boost::uniform_int<> *distribution;
boost::variate_generator<boost::lagged_fibonacci607&,
boost::uniform_int<> > *generator;
#else
void *distribution;
void *generator;
#endif
}
...
@end
In SPRandom.m:
static boost::lagged_fibonacci607 rng;
@implementation SPRandom
- (id) initWithRange:(SPRandomRange)range {
self = [super init];
if (self) {
distribution = new boost::uniform_int<>(range.min,range.max);
generator = new
boost::variate_generator<boost::lagged_fibonacci607&,
boost::uniform_int<> >(rng, *distribution);
}
return self;
}
- (void) dealloc {
delete generator;
delete distribution;
[super dealloc];
}
@end
sherm--
--
Cocoa programming in Perl:
http://www.camelbones.org
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