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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/56437] basic_string assumes that allocators are default-constructible
Date: Mon, 25 Feb 2013 00:12:00 -0000	[thread overview]
Message-ID: <bug-56437-4-HefRW3uWx3@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-56437-4@http.gcc.gnu.org/bugzilla/>


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56437

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> 2013-02-25 00:11:16 UTC ---
C++11 allocators are not required to define any of these:

   typedef T* pointer;
   typedef const T* const_pointer;
   typedef T& reference;
   typedef const T& const_reference;
   typedef unsigned size_type;
   typedef int difference_type;
   template <class U> struct rebind { typedef MyAllocator<U> other; };

But if your allocator fails to define any of them then std::string (and some of
the other containers) will fail to compile. This is a known issue.


  parent reply	other threads:[~2013-02-25  0:12 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-02-24 23:40 [Bug libstdc++/56437] New: " tneumann at pi3 dot informatik.uni-mannheim.de
2013-02-25  0:09 ` [Bug libstdc++/56437] " redi at gcc dot gnu.org
2013-02-25  0:12 ` redi at gcc dot gnu.org [this message]
2013-02-25  6:32 ` tneumann at pi3 dot informatik.uni-mannheim.de
2013-02-25 11:18 ` paolo.carlini at oracle dot com
2014-09-19 11:00 ` redi at gcc dot gnu.org
2014-12-22 13:50 ` redi at gcc dot gnu.org

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