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c++ template double nesting

Started by elijah Jun 2, 2003 at 5:53 AM 4 replies 500+ views

Original Post

Jun 2, 2003 at 5:53 AM

My question is how can I use a C++ template object that it's own template class is also defined as a template. I created two template classes:

 
template <class T>
class a
{....
};

template <class T>
class b
{....
};

and another class:

 
class c
{...
};

The following object definition is legal:

  
b<c> aObj;

But:

   
a<b> aObj;

Or:

a<b<c>> aObj;

is rejected by the compiler. Is there a way overcome this template's double nesting problem ? I would happy to know what you think. [edited by - elijah on June 2, 2003 6:59:12 AM] [edited by - elijah on June 2, 2003 7:02:48 AM] [edited by - elijah on June 2, 2003 7:04:50 AM]

sbennett

Jun 2, 2003 at 6:34 AM

Try
a<b<c> > aObj;

Note the space between the two >s. Without it, the compiler sees it as a >> bitshift operator, which is obviously illegal here.

elijah

Author

elijah

Jun 2, 2003 at 6:54 AM

quote:

Without it, the compiler sees it as a >> bitshift operator, which is obviously illegal here.

sbennett you are right, this was my problem, I didn''t have a space between the signs, this was the reason why the compiler rejected my code. Now it works,
thanks