Re: [Boost-users] [phoenix] Basic recursive function.

13 Apr 2011

      On Wed, Apr 13, 2011 at 8:04 PM, Thomas Heller
wrote:
...
Phoenix V3 (from trunk) has experimental support for recursing into itself:
#include 
#include 
#include 
#include 
#include 
#include 
#include <iostream>
int main()
{
   using boost::phoenix::_this;
   using boost::phoenix::arg_names::_1;
boost::function factorial
        = if_else(
           _1 <= 1
         , 1
         , _1 * _this(_1 - 1)
       );
   std::cout << factorial( 3 ) << std::endl;
}
Have fun playing with it ;)
I don't accept bugfixes for this feature cause i know it is not working in
every
case ... still needs a little work.
If you encounter compile errors, add some dummy phoenix expression at the
end of
the recursing branch.
Thanks Thomas - It's sufficient to know that what I'm trying to
do is a basic limitation of the library. Cutting edge experimental
stuff is fun for me, but not really an option at work!

Cheers, Rob.

Re: [Boost-users] [phoenix] Basic recursive function.

Robert Jones