Re: [Boost-users] BOOST_FOREACH with Index

Subject: Re: [Boost-users] BOOST_FOREACH with Index
From: Nat Goodspeed (nat_at_[hidden])
Date: 2009-12-13 20:41:24

Eric Niebler wrote:

>>>     Why not:
>>>
>>>      int index = 0;
>>>
>>>      BOOST_FOREACH(const Foo &f, foos)
>>>      {
>>>        // ... stuff ...
>>>        ++index;
>>>      }

> What value BOOST_FOREACH has comes 
> primarily from its ability to simplify something that's already pretty 
> darn simple -- a plain for(;;) loop. I strongly resist any effort to 
> make BOOST_FOREACH more complicated, unless the wins are truly 
> significant. In this case, I don't think they are.

Maybe this shouldn't be a BOOST_FOREACH feature at all. As with Python's 
builtin enumerate() function, maybe what we want here is an iterator 
adapter that dereferences to a std::pair<index_type, 
original_iterator_value_type>?