[Boost-bugs] [Boost C++ Libraries] #8729: Library Submission, working with pointer containers

Subject: [Boost-bugs] [Boost C++ Libraries] #8729: Library Submission, working with pointer containers
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-06-25 15:02:20

#8729: Library Submission, working with pointer containers
-------------------------------------------+--------------------------
 Reporter:  Charlie Page <charlie.page@…>  |      Owner:  dgregor
     Type:  Library Submissions            |     Status:  new
Milestone:  To Be Determined               |  Component:  function
  Version:  Boost 1.52.0                   |   Severity:  Optimization
 Keywords:                                 |
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 Hey All,

 I don't even know if this is the right place to submit this, but the
 website seems to indicate it is.

 I was reading a book which seems to suggest that working with pointers in
 containers is harder then it should be.  A couple of templates can make it
 much easier.  For instance, to work with pointers(this template assumes
 that T is derived from unary_function, as std::set Compare types are, and
 long typenames are there to be an example to make this more
 understandable, final form could cut back:

 template <typename T>
 struct dereference {
     typename T::result_type operator()(const typename
 T::first_argument_type* arg1, const typename T::second_argument_type*
 arg2) const {
         return T()(*arg1, *arg2);
     }
 };

 e.x.: std::set<string*, Dereference<std::less<string> > > myset;

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/8729>
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