[PATCH] libstdc++: Fix mingw build by using _M_span [PR119970]

[Tomasz Kamiński]

The r16-142-g01e5ef3e8b9128 chagned return type of _Str_sink::view()
to basic_string_view<_CharT>. The mutable access is provided by _M_span
function, that is now used for mingw path.

libstdc++-v3/ChangeLog:

        * include/std/ostream (vprint_unicode) [_WIN32 && !__CYGWIN__]: Call
        _Str_sink::_M_span instead of view.
        * include/std/print (vprint_unicode) [_WIN32 && !__CYGWIN__]: Call
        _Str_sink::_M_span instead of view.
---
I do not have a way to test that configuration, but the fix seems
obvious in text. I have grepped, and the other file that uses _Str_sink
is bits/chrono_io.h.
OK for trunk?

 libstdc++-v3/include/std/ostream | 2 +-
 libstdc++-v3/include/std/print   | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/libstdc++-v3/include/std/ostream b/libstdc++-v3/include/std/ostream
index 644e568e882..3a0a0d35df1 100644
--- a/libstdc++-v3/include/std/ostream
+++ b/libstdc++-v3/include/std/ostream
@@ -193,7 +193,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       {
        __format::_Str_sink<char> __buf;
        std::vformat_to(__buf.out(), __os.getloc(), __fmt, __args);
-       auto __out = __buf.view();
+       auto __out = __buf._M_span();
 
        void* __open_terminal(streambuf*);
        error_code __write_to_terminal(void*, span<char>);
diff --git a/libstdc++-v3/include/std/print b/libstdc++-v3/include/std/print
index ea1aaac4389..92dbe118fc3 100644
--- a/libstdc++-v3/include/std/print
+++ b/libstdc++-v3/include/std/print
@@ -73,7 +73,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 #else
     __format::_Str_sink<char> __buf;
     std::vformat_to(__buf.out(), __fmt, __args);
-    auto __out = __buf.view();
+    auto __out = __buf._M_span();
 
     void* __open_terminal(FILE*);
     error_code __write_to_terminal(void*, span<char>);
-- 
2.49.0