gdbsupport: Remove gdb::string_view

Now that all places using gdb::string_view have been updated to use
std::string_view, this patch drops the gdb::string_view implementation
and the tests which came with it.

As this drops the unittests/string_view-selftests.c, this also
implicitly solves PR build/23676, as pointed-out by Tom Tromey.

Change-Id: Idf5479b09e0ac536917b3f0e13aca48424b90df0
Approved-By: Tom Tromey <tom@tromey.com>
Approved-By: Pedro Alves <pedro@palves.net>
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=23676

7 files changed, 0 insertions, 499 deletions

diff --git a/gdb/unittests/basic_string_view/inserters/char/1.cc b/gdb/unittests/basic_string_view/inserters/char/1.cc
deleted file mode 100644
index e0a33bf..0000000
--- a/gdb/unittests/basic_string_view/inserters/char/1.cc
+++ /dev/null
@@ -1,65 +0,0 @@
-// { dg-options "-std=gnu++17" }
-
-// Copyright (C) 2013-2023 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/>.
-
-// inserters
-
-// NB: This file is predicated on sstreams, istreams, and ostreams
-// working, not to mention other major details like char_traits, and
-// all of the string_view class.
-
-#include <string_view>
-#include <stdexcept>
-#include <sstream>
-#include <fstream>
-#include <iostream>
-#include <testsuite_hooks.h>
-
-void
-test01()
-{
-  typedef std::string_view::size_type csize_type;
-  typedef std::string_view::const_reference cref;
-  typedef std::string_view::reference ref;
-
-  const std::string_view str01("sailing grand traverse bay\n"
-	       "\t\t\t    from Elk Rapids to the point reminds me of miles");
-    
-  // ostream& operator<<(ostream&, const basic_string_view&)
-  std::ostringstream ostrs01;
-  try 
-    {
-      ostrs01 << str01;
-      VERIFY( ostrs01.str() == str01 );
-    }
-  catch(std::exception& fail) 
-    {
-      VERIFY( false );
-    }
-  
-  std::string_view hello_world;
-  std::cout << hello_world;
-}
-
-int
-main()
-{ 
-  test01();
-
-  return 0;
-}
diff --git a/gdb/unittests/basic_string_view/inserters/char/2.cc b/gdb/unittests/basic_string_view/inserters/char/2.cc
deleted file mode 100644
index 840f521..0000000
--- a/gdb/unittests/basic_string_view/inserters/char/2.cc
+++ /dev/null
@@ -1,91 +0,0 @@
-
-// Copyright (C) 2013-2023 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/>.
-
-// inserters
-
-// NB: This file is predicated on sstreams, ostreams
-// working, not to mention other major details like char_traits, and
-// all of the string_view class.
-
-// { dg-options "-std=gnu++17" }
-// { dg-require-fileio "" }
-
-namespace inserters_2 {
-
-// testing basic_filebuf::xsputn via stress testing with large string_views
-// based on a bug report libstdc++ 9
-// mode == out
-static void
-test05 (std::size_t size)
-{
-  bool test ATTRIBUTE_UNUSED = true;
-
-  const char filename[] = "inserters_extractors-2.txt";
-  const char fillc = 'f';
-  std::ofstream ofs(filename);
-  std::string str(size, fillc);
-  gdb::string_view strv{str};
-
-  // sanity checks
-  VERIFY( str.size() == size );
-  VERIFY( ofs.good() );
-
-  // stress test
-  ofs << str << std::endl;
-  if (!ofs.good()) 
-    test = false;
-
-  ofs << str << std::endl;
-  if (!ofs.good()) 
-    test = false;
-
-  VERIFY( str.size() == size );
-  VERIFY( ofs.good() );
-
-  ofs.close();
-
-  // sanity check on the written file
-  std::ifstream ifs(filename);
-  std::size_t count = 0;
-  char c;
-  while (count <= (2 * size) + 4)
-    {
-      ifs >> c;
-      if (ifs.good() && c == fillc)
-	{
-	  ++count;
-	  c = '0';
-	}
-      else 
-	break;
-    }
-
-  VERIFY( count == 2 * size );
-}
-
-static int
-main ()
-{
-  test05(1); 
-  test05(1000); 
-  test05(10000);
-
-  return 0;
-}
-
-} // namespace inserters_2
diff --git a/gdb/unittests/basic_string_view/inserters/char/3.cc b/gdb/unittests/basic_string_view/inserters/char/3.cc
deleted file mode 100644
index 43e3ae0..0000000
--- a/gdb/unittests/basic_string_view/inserters/char/3.cc
+++ /dev/null
@@ -1,54 +0,0 @@
-// { dg-options "-std=gnu++17" }
-
-// Copyright (C) 2013-2023 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/>.
-
-// inserters
-
-// NB: This file is predicated on sstreams, and ostreams
-// working, not to mention other major details like char_traits, and
-// all of the string_view class.
-
-#include <string_view>
-#include <sstream>
-#include <iomanip>
-#include <testsuite_hooks.h>
-
-// libstdc++/2830
-void
-test09()
-{
-  std::string_view foo{"peace\0\0\0& love"};
-
-  std::ostringstream oss1;
-  oss1 << foo;
-  VERIFY( oss1.str() == foo );
-
-  std::ostringstream oss2;
-  oss2.width(20);
-  oss2 << foo;
-  VERIFY( oss2.str() != foo );
-  VERIFY( oss2.str().size() == 20 );
-}
-
-int
-main()
-{ 
-  test09();
-
-  return 0;
-}
diff --git a/gdb/unittests/basic_string_view/inserters/pod/10081-out.cc b/gdb/unittests/basic_string_view/inserters/pod/10081-out.cc
deleted file mode 100644
index 4b5d81d..0000000
--- a/gdb/unittests/basic_string_view/inserters/pod/10081-out.cc
+++ /dev/null
@@ -1,75 +0,0 @@
-// { dg-options "-std=gnu++17" }
-
-// Copyright (C) 2013-2023 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/>.
-
-// class basic_istream::sentry
-
-#include <string_view>
-#include <ostream>
-#include <sstream>
-#include <locale>
-#include <typeinfo>
-#include <testsuite_hooks.h>
-#include <testsuite_character.h>
-
-void
-test01()
-{
-  using namespace std;
-
-  using __gnu_test::pod_ushort;
-  typedef basic_string_view<pod_ushort> 	string_type;
-  typedef basic_stringbuf<pod_ushort> 	stringbuf_type;
-  typedef basic_ostream<pod_ushort> 	ostream_type;
-
-  string_type str;
-  stringbuf_type strbuf01;
-  ostream_type stream(&strbuf01);
-
-  try
-    {
-      stream << str;
-    }
-  catch (std::bad_cast& obj)
-    {
-      // Ok, throws bad_cast because locale has no ctype facet.
-    }
-  catch (...)
-    {
-      VERIFY( false );
-    }
-
-  const std::locale loc(std::locale::classic(), new std::ctype<pod_ushort>);
-  stream.imbue(loc);
-  try
-    {
-      stream << str;
-    }
-  catch (...)
-    {
-      VERIFY( false );
-    }
-}
-
-int
-main()
-{
-  test01();
-
-  return 0;
-}
diff --git a/gdb/unittests/basic_string_view/inserters/wchar_t/1.cc b/gdb/unittests/basic_string_view/inserters/wchar_t/1.cc
deleted file mode 100644
index 6975425..0000000
--- a/gdb/unittests/basic_string_view/inserters/wchar_t/1.cc
+++ /dev/null
@@ -1,70 +0,0 @@
-// { dg-options "-std=gnu++17" }
-
-// Copyright (C) 2013-2023 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/>.
-
-// inserters
-
-// NB: This file is predicated on sstreams, and ostreams
-// working, not to mention other major details like char_traits, and
-// all of the string_view class.
-
-#include <string_view>
-#include <stdexcept>
-#include <sstream>
-#include <fstream>
-#include <iostream>
-#include <testsuite_hooks.h>
-
-void
-test01()
-{
-  typedef std::wstring_view::size_type csize_type;
-  typedef std::wstring_view::const_reference cref;
-  typedef std::wstring_view::reference ref;
-
-  const std::wstring_view str01(L"sailing grand traverse bay\n"
-	       L"\t\t\t    from Elk Rapids to the point reminds me of miles");
-  const std::wstring_view str02(L"sailing");
-  const std::wstring_view str03(L"grand");
-  const std::wstring_view str04(L"traverse");
-  const std::wstring_view str05;
-  std::wstring_view str10;
-
-  // ostream& operator<<(ostream&, const basic_string_view&)
-  std::wostringstream ostrs01;
-  try 
-    {
-      ostrs01 << str01;
-      VERIFY( ostrs01.str() == str01 );
-    }
-  catch(std::exception& fail) 
-    {
-      VERIFY( false );
-    }
-  
-  std::wstring_view hello_world;
-  std::wcout << hello_world;
-}
-
-int
-main()
-{ 
-  test01();
-
-  return 0;
-}
diff --git a/gdb/unittests/basic_string_view/inserters/wchar_t/2.cc b/gdb/unittests/basic_string_view/inserters/wchar_t/2.cc
deleted file mode 100644
index 5cc3e93..0000000
--- a/gdb/unittests/basic_string_view/inserters/wchar_t/2.cc
+++ /dev/null
@@ -1,91 +0,0 @@
-// { dg-options "-std=gnu++17" }
-
-// Copyright (C) 2013-2023 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/>.
-
-// inserters
-
-// NB: This file is predicated on sstreams, istreams, and ostreams
-// working, not to mention other major details like char_traits, and
-// all of the string_view class.
-
-#include <string_view>
-#include <string>
-#include <fstream>
-#include <iostream>
-#include <testsuite_hooks.h>
-
-// testing basic_filebuf::xsputn via stress testing with large string_views
-// based on a bug report libstdc++ 9
-// mode == out
-void
-test05(std::size_t size)
-{
-  bool test = true;
-
-  const char filename[] = "inserters_extractors-2.txt";
-  const wchar_t fillc = L'f';
-  std::wofstream ofs(filename);
-  std::wstring str(size, fillc);
-  std::wstring_view strv(str);
-
-  // sanity checks
-  VERIFY( str.size() == size );
-  VERIFY( ofs.good() );
-
-  // stress test
-  ofs << str << std::endl;
-  if (!ofs.good()) 
-    test = false;
-
-  ofs << str << std::endl;
-  if (!ofs.good()) 
-    test = false;
-
-  VERIFY( str.size() == size );
-  VERIFY( ofs.good() );
-
-  ofs.close();
-
-  // sanity check on the written file
-  std::wifstream ifs(filename);
-  std::size_t count = 0;
-  wchar_t c;
-  while (count <= (2 * size) + 4)
-    {
-      ifs >> c;
-      if (ifs.good() && c == fillc)
-	{
-	  ++count;
-	  c = '0';
-	}
-      else 
-	break;
-    }
-
-  VERIFY( count == 2 * size );
-}
-
-int
-main()
-{
-  test05(1); 
-  test05(1000); 
-  test05(10000);
-
-  return 0;
-}
diff --git a/gdb/unittests/basic_string_view/inserters/wchar_t/3.cc b/gdb/unittests/basic_string_view/inserters/wchar_t/3.cc
deleted file mode 100644
index 5eabf46..0000000
--- a/gdb/unittests/basic_string_view/inserters/wchar_t/3.cc
+++ /dev/null
@@ -1,53 +0,0 @@
-// { dg-options "-std=gnu++17" }
-
-// Copyright (C) 2013-2023 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/>.
-
-// inserters
-
-// NB: This file is predicated on sstreams, istreams, and ostreams
-// working, not to mention other major details like char_traits, and
-// all of the string_view class.
-
-#include <string_view>
-#include <sstream>
-#include <iomanip>
-#include <testsuite_hooks.h>
-
-void
-test09()
-{
-  std::wstring_view foo{L"peace\0\0\0& love"};
-  
-  std::wostringstream oss1;
-  oss1 << foo;
-  VERIFY( oss1.str() == foo );
-  
-  std::wostringstream oss2;
-  oss2.width(20);
-  oss2 << foo;
-  VERIFY( oss2.str() != foo );
-  VERIFY( oss2.str().size() == 20 );
-}
-
-int
-main()
-{ 
-  test09();
-
-  return 0;
-}