[PATCH] Fix libstdc++/7186

[Paolo Carlini]

Hi,

it turns out that the PR can be fixed exactly in the same way of 
libstdc++/6642. Of course, I have also verified that the behavior for 
reverse_iterator is not affected (perhaps we can consider adding a *neg 
test for reverse iterators, here and for 6642, reminding the open state 
of DR280). Tested i686-pc-linux-gnu.

Ok for trunk?

Ciao, Paolo.

////////////////////

2002-07-05  Paolo Carlini  <pcarlini@unitus.it>

        PR libstdc++/7186
        * include/bits/stl_deque.h (_Deque_iterator::operator-):
        Make non-member, as already happens for the comparison
        operators in accord with DR179 (Ready).
        * testsuite/23_containers/deque_operators.cc: Add test02.


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