1 files changed, 119 insertions, 0 deletions
diff --git a/libstdc++-v3/testsuite/27_io/headers/iosfwd/synopsis.cc b/libstdc++-v3/testsuite/27_io/headers/iosfwd/synopsis.cc
new file mode 100644
index 00000000000..48f733bf28a
--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/headers/iosfwd/synopsis.cc
@@ -0,0 +1,119 @@
+// { dg-do compile }
+
+#include <iosfwd>
+
+namespace std
+{
+  // [iosfwd.syn]
+
+  template<class charT> struct char_traits;
+  template<> struct char_traits<char>;
+#if __cplusplus >= 202002L
+  template<> struct char_traits<char8_t>;
+#endif
+#if __cplusplus >= 201103L
+  template<> struct char_traits<char16_t>;
+  template<> struct char_traits<char32_t>;
+#endif
+  template<> struct char_traits<wchar_t>;
+
+  template<class T> class allocator;
+
+  template<class charT, class traits>
+    class basic_ios;
+  template<class charT, class traits>
+    class basic_streambuf;
+  template<class charT, class traits>
+    class basic_istream;
+  template<class charT, class traits>
+    class basic_ostream;
+  template<class charT, class traits>
+    class basic_iostream;
+
+_GLIBCXX_BEGIN_NAMESPACE_CXX11
+  template<class charT, class traits, class Allocator>
+    class basic_stringbuf;
+  template<class charT, class traits, class Allocator>
+    class basic_istringstream;
+  template<class charT, class traits, class Allocator>
+    class basic_ostringstream;
+  template<class charT, class traits, class Allocator>
+    class basic_stringstream;
+_GLIBCXX_END_NAMESPACE_CXX11
+
+  template<class charT, class traits>
+    class basic_filebuf;
+  template<class charT, class traits>
+    class basic_ifstream;
+  template<class charT, class traits>
+    class basic_ofstream;
+  template<class charT, class traits>
+    class basic_fstream;
+
+#if __cplusplus >= 202002L && _GLIBCXX_USE_CXX11_ABI
+  template<class charT, class traits, class Allocator>
+    class basic_syncbuf;
+  template<class charT, class traits, class Allocator>
+    class basic_osyncstream;
+#endif
+
+  template<class charT, class traits>
+    class istreambuf_iterator;
+  template<class charT, class traits>
+    class ostreambuf_iterator;
+
+  typedef basic_ios<char>    ios;
+  typedef basic_ios<wchar_t> wios;
+
+  typedef basic_streambuf<char> streambuf;
+  typedef basic_istream<char>   istream;
+  typedef basic_ostream<char>   ostream;
+  typedef basic_iostream<char>  iostream;
+
+  typedef basic_stringbuf<char>     stringbuf;
+  typedef basic_istringstream<char> istringstream;
+  typedef basic_ostringstream<char> ostringstream;
+  typedef basic_stringstream<char>  stringstream;
+
+
+  typedef basic_filebuf<char>  filebuf;
+  typedef basic_ifstream<char> ifstream;
+  typedef basic_ofstream<char> ofstream;
+  typedef basic_fstream<char>  fstream;
+
+#if __cplusplus >= 202002L && _GLIBCXX_USE_CXX11_ABI
+  typedef basic_syncbuf<char>     syncbuf;
+  typedef basic_osyncstream<char> osyncstream;
+#endif
+
+  typedef basic_streambuf<wchar_t> wstreambuf;
+  typedef basic_istream<wchar_t>   wistream;
+  typedef basic_ostream<wchar_t>   wostream;
+  typedef basic_iostream<wchar_t>  wiostream;
+
+  typedef basic_stringbuf<wchar_t>     wstringbuf;
+  typedef basic_istringstream<wchar_t> wistringstream;
+  typedef basic_ostringstream<wchar_t> wostringstream;
+  typedef basic_stringstream<wchar_t>  wstringstream;
+
+  typedef basic_filebuf<wchar_t>  wfilebuf;
+  typedef basic_ifstream<wchar_t> wifstream;
+  typedef basic_ofstream<wchar_t> wofstream;
+  typedef basic_fstream<wchar_t>  wfstream;
+
+#if __cplusplus >= 202002L
+  typedef basic_syncbuf<wchar_t>     wsyncbuf;
+  typedef basic_osyncstream<wchar_t> wosyncstream;
+#endif
+
+  template<class state> class fpos;
+  typedef fpos<std::mbstate_t> streampos;
+  typedef fpos<std::mbstate_t> wstreampos;
+#if __cplusplus >= 202002L
+  typedef fpos<std::mbstate_t> u8streampos;
+#endif
+#if __cplusplus >= 201103L
+  typedef fpos<std::mbstate_t> u16streampos;
+  typedef fpos<std::mbstate_t> u32streampos;
+#endif
+}