[Bug libstdc++/31555] New: stable_partition assumes iterator difference type is always ptrdiff_t

[djg at cray dot com]

Instantiating stable_partition with an iterator where the difference_type is
something different than ptrdiff_t results in an error like this:

.../bits/stl_algo.h: In function `_ForwardIterator
std::stable_partition(_ForwardIterator, _ForwardIterator, _Predicate) [with
_ForwardIterator = my_iterator, _Predicate = bool (*)(double)]':
test.c:32:   instantiated from here
.../bits/stl_algo.h:2154: error: no matching function for call to
`__stable_partition_adaptive(my_iterator&, my_iterator&, bool (*&)(double),
short int, double*, ptrdiff_t)'

The __stable_parition_adaptive effectively requires the __len and __buffer_size
arguments to have the same type, and stable_parition calls it with one of them
always as ptrdiff_t.


-- 
           Summary: stable_partition assumes iterator difference type is
                    always ptrdiff_t
           Product: gcc
           Version: 4.1.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: djg at cray dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31555