[Bug libstdc++/56267] [4.7/4.8/4.9 Regression] unordered containers require Assignable hash function

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56267

--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Mon Jan 20 15:49:39 2014
New Revision: 206834

URL: http://gcc.gnu.org/viewcvs?rev=206834&root=gcc&view=rev
Log:
    PR libstdc++/56267
    * include/bits/hashtable_policy.h (_Hash_code_base<... false>): Grant
    friendship to _Local_iterator_base<..., false>.
    (_Local_iterator_base): Give protected access to all existing members.
    (_Local_iterator_base::_M_curr()): New public accessor.
    (_Local_iterator_base::_M_get_bucket()): New public accessor.
    (_Local_iterator_base<..., false>::_M_init()): New function to manage
    the lifetime of the _Hash_code_base explicitly.
    (_Local_iterator_base<..., false>::_M_destroy()): Likewise.
    (_Local_iterator_base<..., false>): Define copy constructor and copy
    assignment operator that use new functions to manage _Hash_code_base.
    (operator==(const _Local_iterator_base&, const _Local_iterator_base&),
    operator==(const _Local_iterator_base&, const _Local_iterator_base&)):
    Use public API for _Local_iterator_base.
    * include/debug/safe_local_iterator.h (_Safe_local_iterator): Likewise.
    * include/debug/unordered_map (__debug::unordered_map::erase(),
    __debug::unordered_multimap::erase()): Likewise.
    * include/debug/unordered_set (__debug::unordered_set::erase(),
    __debug::unordered_multiset::erase()): Likewise.
    * testsuite/23_containers/unordered_set/56267-2.cc: New test.

Added:
    trunk/libstdc++-v3/testsuite/23_containers/unordered_set/56267-2.cc
Modified:
    trunk/libstdc++-v3/ChangeLog
    trunk/libstdc++-v3/include/bits/hashtable_policy.h
    trunk/libstdc++-v3/include/debug/safe_local_iterator.h
    trunk/libstdc++-v3/include/debug/unordered_map
    trunk/libstdc++-v3/include/debug/unordered_set