Remove deprecated iostream members for C++17

	* include/bits/ios_base.h (ios_base::io_state, ios_base::open_mode)
	(ios_base::seek_dir): Remove for C++17.
	* include/std/streambuf (basic_streambuf::stossc): Remove for C++17.
	Add deprecated attribute for C++11 and C++14.
	* testsuite/27_io/types/1.cc: Don't run for C++17 and later.
	* testsuite/27_io/types/4.cc: New.

From-SVN: r250531

libstdc++-v3/ChangeLog

+2017-07-25  Jonathan Wakely  <jwakely@redhat.com>
+
+	* include/bits/ios_base.h (ios_base::io_state, ios_base::open_mode)
+	(ios_base::seek_dir): Remove for C++17.
+	* include/std/streambuf (basic_streambuf::stossc): Remove for C++17.
+	Add deprecated attribute for C++11 and C++14.
+	* testsuite/27_io/types/1.cc: Don't run for C++17 and later.
+	* testsuite/27_io/types/4.cc: New.
+
 2017-07-23  Michael Collison  <michael.collison@arm.com>
 
 	Add optimized implementation of mersenne twister for aarch64

libstdc++-v3/include/bits/ios_base.h

@@ -469,13 +469,15 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     /// Request a seek relative to the current end of the sequence.
     static const seekdir end =		_S_end;
 
-    // Annex D.6
+#if __cplusplus <= 201402L
+    // Annex D.6 (removed in C++17)
     typedef int io_state;
     typedef int open_mode;
     typedef int seek_dir;
 
     typedef std::streampos streampos;
     typedef std::streamoff streamoff;
+#endif
 
     // Callbacks;
     /**

libstdc++-v3/include/std/streambuf

@@ -768,8 +768,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       overflow(int_type __c  = traits_type::eof())
       { return traits_type::eof(); }
 
-#if _GLIBCXX_USE_DEPRECATED
-    // Annex D.6
+#if _GLIBCXX_USE_DEPRECATED && __cplusplus <= 201402L
+    // Annex D.6 (removed in C++17)
     public:
       /**
        *  @brief  Tosses a character.
@@ -779,6 +779,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
        *
        *  See http://gcc.gnu.org/ml/libstdc++/2002-05/msg00168.html
        */
+#if __cplusplus >= 201103L
+      [[__deprecated__("stossc is deprecated, use sbumpc instead")]]
+#endif
       void
       stossc()
       {

libstdc++-v3/testsuite/27_io/types/1.cc

@@ -15,6 +15,8 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
+// { dg-do compile { target c++14_down } }
+
 // 27.4.2.1 - Types [lib.ios.types]
 
 #include <ios>
@@ -27,9 +29,3 @@ void test01()
   typedef std::ios_base::streampos streampos_type;
   typedef std::ios_base::streamoff streamoff_type;
 }
-
-int main(void)
-{
-  test01();
-  return 0;
-}

libstdc++-v3/testsuite/27_io/types/4.cc

+// Copyright (C) 2017 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+// { dg-options "-std=gnu++17" }
+// { dg-do compile { target c++1z } }
+
+// In C++17 these names are not reserved by the library.
+#define io_state 1
+#define open_mode 2
+#define seek_dir 3
+#define stossc 4
+#include <streambuf>
+
+template class std::basic_streambuf<char>;
+template class std::basic_streambuf<wchar_t>;