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

Subject: [Boost-bugs] [Boost C++ Libraries] #6278: mem_fn has a different result_type
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2011-12-16 10:54:47

#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
 Keywords: |
 The following code does not compile:


    All function objects returned by mem_fn expose a result_type typedef
    that represents the return type of the member function. For data
    members, result_type is defined as the type of the member.


 typedef int type_of_the_member;

 struct U { type_of_the_member m; };

 template < class F >
 typename F ::result_type U_m (F const &t, U &u)
 { typedef typename F:: result_type r; typedef type_of_the_member r;
 typename F:: result_type r1; return t (u); }

 U u; int x ((U_m (::boost ::mem_fn (&U ::m), u)));

 [http://codepad.org/1op6p2Mc codepad] says: ''error: conflicting
 declaration 'typedef type_of_the_member r' ''

Ticket URL: <https://svn.boost.org/trac/boost/ticket/6278>
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