Re: [Boost-users] how can I return a 'null' smart pointer?

14 Jul 2008

      At 4:43 PM -0500 7/14/08, Meryl Silverburgh wrote:
...
Hi,
Can you please tell me how can I return a 'null' smart pointer?
typedef shared_ptr<MyA> MyAPtr;
typedef vector<MyAPtr>  MyAVector;
For example,I have this code, which return NULL in an error situation:
MyAPtr myfunction(MyAVector& v, int size) {
      if (index < v.size()) {
            return v[index];
       } else {
          // how can I return NULL here?
      }
}
How can I achieve that when I use boost smart pointer?
I suggest that you throw an exception here, rather than returning 
some bogus value.
-- 
-- Marshall

Marshall Clow     Idio Software   <mailto:marshall@idio.com>

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