[Bug libstdc++/11450] New: fpos problems

[peturr02 at ru dot is]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11450

           Summary: fpos problems
           Product: gcc
           Version: 3.4
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: libstdc++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: peturr02 at ru dot is
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu

fpos<StateT> fails to link for StateT other than mbstate_t. As noted in
DR 352, the standard doesn't give any requirements for StateT, but in
previous versions of gcc, fpos has worked for any type that is
DefaultConstuctable, CopyConstructable and Assignable.

Also, the comment

      // NB: The standard defines only the implicit copy ctor and the
      // previous two members.  The rest is a "conforming extension".

is incorrect, since almost all of what follows is required by the standard.