Re: [Boost-users] Re: interest in a glob_iterator? (directory_iterator with regex)

15 Jan 2004


      On Wednesday, January 14, 2004, at 10:32 PM, David Abrahams wrote:
...
Rich Johnson  writes:
...
O.K. I'll do it.  But my first task is to get a discussion going on
the developer's list.
I'd want to see it decomposed into the following components:
This was the approach I took.
1. A function which translates glob patterns into regexes
This is the non-trivial part.    I've opted to use a two-step process 
of:
     - regex_traits to map shell-style meta chars to regex syntax
                 where-ever there's a 1-1 mapping.
     - a minimal string transform to convert the glob pattern to a
                regex pattern corresponding to the above traits.
The specifics of this implementation are of course subject to debate.
...
2. A filter_iterator adaptor which uses a regex matching function
     to match the paths from a directory_iterator
This is the easy part--provide a predicate which encapsulates and
  invokes the regex produced above.

--rich