Subj : Ping?
To   : Bo Simonsen
From : andrew clarke
Date : Thu Apr 30 2009 01:03:06

On Tue 2009-04-28 22:04, Bo Simonsen (2:236/100) wrote to Mike Luther:

 BS> Just thought of, are you guys also excited to see the final
 BS> version of the C++0x standard?

 BS> So far, I've experimented some, especially with the auto-keyword.
 BS> (It's in GCC 4.4)

 BS> Instead of writing:

 BS> std::set<int> cont;
 BS> cont.insert(5);
 BS> cont.insert(7);

 BS> for(typename std::set<int>::iterator it = cont.begin(); 
 BS>     it != cont.end();
 BS>     ++it) {
 BS>     // do something with *it
 BS> }

How does "typename" work here?  I'm not familiar with recent C++ developments...

 BS> We can simply write:

 BS> for(auto it=cont.begin(); it != cont.end(); ++it) {

 BS> }

Hmm.  I don't really know how that works, but I think I prefer this:

    typedef std::set<int> intset_t;
    intset_t cont;

    cont.insert(5);
    cont.insert(7);

    intset_t::iterator it = cont.begin();

    while (it != cont.end())
    {
        // do something with *it
        ++it;
    }

Having said that, my personal preference is a bit academic - as these days I spend most of my programming time writing code in Python :-)

  cont = set()
  cont.add(5)
  cont.add(7)

  for it in cont:
    print it

Regards
Andrew

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