Re: [Boost-bugs] [Boost C++ Libraries] #6278: mem_fn has a different result_type

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #6278: mem_fn has a different result_type
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2011-12-16 18:50:07

#6278: mem_fn has a different result_type
  Reporter: giecrilj@… | Owner: pdimov
      Type: Bugs | Status: new
 Milestone: To Be Determined | Component: bind
   Version: Boost 1.48.0 | Severity: Problem
Resolution: | Keywords:

Comment (by giecrilj@…):

 If result_type were plain, as it ''allegedly'' is, and the type of the
 member were noncopyable then returning it from a function would be a

 Specific problem:
   * you cannot copy into a `transform_iterator` when the transform selects
 a reference to a member by means of `mem_fn`.

 If I may digress a bit, I suppose that the reason why the standard does
 not provide an analogue for `mem_fun_ref` for data members is that
 accessing data members is discouraged in C++. Having come to that
 conclusion, I added the necessary accessors to the underlying class and
 used just `mem_fun_ref`, eradicating `mem_fn` completely.

Ticket URL: <>
Boost C++ Libraries <>
Boost provides free peer-reviewed portable C++ source libraries.

This archive was generated by hypermail 2.1.7 : 2017-02-16 18:50:08 UTC