[Bug libstdc++/123147] std::chrono::parse does not support wchar_t

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123147

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I think it should just be using basic_stringstream<char>:

--- a/libstdc++-v3/include/bits/chrono_io.h
+++ b/libstdc++-v3/include/bits/chrono_io.h
@@ -4976,14 +4976,14 @@ namespace __detail
                    }
                  else // Read fractional seconds
                    {
-                     basic_stringstream<_CharT> __buf;
+                     stringstream __buf;
                      auto __digit = _S_try_read_digit(__is, __err);
                      if (__digit != -1)
                        {
-                         __buf.put(_CharT('0') + __digit);
+                         __buf.put('0' + __digit);
                          __digit = _S_try_read_digit(__is, __err);
                          if (__digit != -1)
-                           __buf.put(_CharT('0') + __digit);
+                           __buf.put('0' + __digit);
                        }

                      auto __i = __is.peek();
@@ -5008,7 +5008,7 @@ namespace __detail
                                {
                                  __digit = _S_try_read_digit(__is, __err);
                                  if (__digit != -1)
-                                   __buf.put(_CharT('0') + __digit);
+                                   __buf.put('0' + __digit);
                                  else
                                    break;
                                }