Cleanups 8: Deprecate `<strstream>` classes instead of the entire header (#2680)

stl/inc/__msvc_all_public_headers.hpp

@@ -35,7 +35,6 @@
 #endif // TRANSITION, OS-17090155 (UCRT)
 
 #define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
-#define _SILENCE_CXX17_STRSTREAM_DEPRECATION_WARNING
 #define _SILENCE_EXPERIMENTAL_FILESYSTEM_DEPRECATION_WARNING
 #define _SILENCE_STDEXT_HASH_DEPRECATION_WARNINGS
 

stl/inc/strstream

@@ -18,11 +18,9 @@ _STL_DISABLE_CLANG_WARNINGS
 #undef new
 
 _STD_BEGIN
-
-_CXX17_DEPRECATE_STRSTREAM typedef int _Header_strstream;
-using _Hdr_strstream = _Header_strstream;
-
-class strstreambuf : public streambuf { // stream buffer associated with static or allocated character array
+_STL_DISABLE_DEPRECATED_WARNING
+class _CXX17_DEPRECATE_STRSTREAM strstreambuf : public streambuf {
+    // stream buffer associated with static or allocated character array
 public:
     using _Mysb = streambuf;
     enum { // constants for bits in stream state
@@ -423,7 +421,8 @@ inline void swap(strstreambuf& _Left, strstreambuf& _Right) {
     _Left.swap(_Right);
 }
 
-class istrstream : public istream { // input stream associated with a character array
+class _CXX17_DEPRECATE_STRSTREAM istrstream : public istream {
+    // input stream associated with a character array
 public:
     using _Mybase = istream;
     using _Mysb   = strstreambuf;
@@ -486,7 +485,8 @@ inline void swap(istrstream& _Left, istrstream& _Right) {
     _Left.swap(_Right);
 }
 
-class ostrstream : public ostream { // output stream associated with a character array
+class _CXX17_DEPRECATE_STRSTREAM ostrstream : public ostream {
+    // output stream associated with a character array
 public:
     using _Mybase = ostream;
     using _Mysb   = strstreambuf;
@@ -548,7 +548,8 @@ inline void swap(ostrstream& _Left, ostrstream& _Right) {
     _Left.swap(_Right);
 }
 
-class strstream : public iostream { // input/output stream associated with character array buffer
+class _CXX17_DEPRECATE_STRSTREAM strstream : public iostream {
+    // input/output stream associated with character array buffer
 public:
     using _Mybase = iostream;
     using _Mysb   = strstreambuf;
@@ -614,6 +615,7 @@ private:
 inline void swap(strstream& _Left, strstream& _Right) {
     _Left.swap(_Right);
 }
+_STL_RESTORE_DEPRECATED_WARNING
 _STD_END
 #pragma pop_macro("new")
 _STL_RESTORE_CLANG_WARNINGS

tests/std/tests/VSO_0000000_instantiate_iterators_misc/test.compile.pass.cpp

@@ -11,7 +11,6 @@
 #define _SILENCE_CXX17_NEGATORS_DEPRECATION_WARNING
 #define _SILENCE_CXX17_OLD_ALLOCATOR_MEMBERS_DEPRECATION_WARNING
 #define _SILENCE_CXX17_RAW_STORAGE_ITERATOR_DEPRECATION_WARNING
-#define _SILENCE_CXX17_STRSTREAM_DEPRECATION_WARNING
 #define _SILENCE_CXX17_TEMPORARY_BUFFER_DEPRECATION_WARNING
 #define _SILENCE_CXX20_ATOMIC_INIT_DEPRECATION_WARNING
 #define _SILENCE_CXX20_CODECVT_FACETS_DEPRECATION_WARNING

tests/std/tests/include_each_header_alone_matrix.lst

@@ -71,7 +71,7 @@ PM_CL="/DMEOW_HEADER=stop_token"
 PM_CL="/DMEOW_HEADER=streambuf"
 PM_CL="/DMEOW_HEADER=string"
 PM_CL="/DMEOW_HEADER=string_view"
-PM_CL="/DMEOW_HEADER=strstream /D_SILENCE_CXX17_STRSTREAM_DEPRECATION_WARNING"
+PM_CL="/DMEOW_HEADER=strstream"
 PM_CL="/DMEOW_HEADER=syncstream"
 PM_CL="/DMEOW_HEADER=system_error"
 PM_CL="/DMEOW_HEADER=thread"