[Bug libstdc++/105284] missing syncstream and spanstream forward decl. in

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105284

--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-12 branch has been updated by Jonathan Wakely
<r...@gcc.gnu.org>:

https://gcc.gnu.org/g:cc93971399ad9719b5bda878630e69c5914f2202

commit r12-8365-gcc93971399ad9719b5bda878630e69c5914f2202
Author: Jonathan Wakely <jwak...@redhat.com>
Date:   Tue May 10 13:06:47 2022 +0100

    libstdc++: Add <spanstream> declarations to <iosfwd> [PR105284]

    libstdc++-v3/ChangeLog:

            PR libstdc++/105284
            * include/std/iosfwd: Add declarations for <spanstream> class
            templates and typedefs.
            * include/std/spanstream (basic_spanbuf, basic_ispanstream)
            (basic_ospanstream, basic_spanstream): Remove default template
            arguments.
            * testsuite/27_io/headers/iosfwd/synopsis.cc: Add <spanstream>
            declarations.
            * testsuite/27_io/headers/iosfwd/types.cc: Check <spanstream>
            default arguments.

    (cherry picked from commit ca97c87758d450a946cac31b0db43da0039fabf1)