On 10/09/20 5:19 pm, Jonathan Wakely wrote:
On 09/09/20 22:12 +0200, François Dumont via Libstdc++ wrote:
libstdc++: Add std::advance overload for ostreambuf_iterator

Implement std::advance overload for ostreambuf_iterator using basic_streambuf
pubseekof.

libstdc++-v3/ChangeLog:

        * include/bits/streambuf_iterator.h (ostreambuf_iterator): Add
        std::advance friend declaration.
        (advance(ostreambuf_iterator<>&, _Distance)): New.
        * testsuite/25_algorithms/advance/ostreambuf_iterator/char/1.cc:
        New test.
        * testsuite/25_algorithms/advance/ostreambuf_iterator/char/1_neg.cc:
        New test.
        * testsuite/25_algorithms/advance/ostreambuf_iterator/char/2.cc:
        New test.
        * testsuite/25_algorithms/advance/ostreambuf_iterator/char/2_neg.cc:
        New test.

Tested under Linux x85_64.

Ok to commit ?

I think relying on seeking here is a bad idea for the same reason as
in my previous email. We don't know what seek does for an arbitrary
derived streambuf, or even if it is possible at all.


Ok, I'll rework this one based on the others' feedback.

Thanks

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