gistfile1.m

// clang -framework Foundation -fobjc-arc test.m

#include <Foundation/Foundation.h>


@interface Foo : NSObject @end
@implementation Foo

+ alloc
{
    NSLog(@"in Foo alloc");
    return (Foo *)@"yep";
}

@end

int main(int argc, char **argv)
{
    NSLog(@"%@", [Foo alloc]);
    return 0;
}