libstdc++: P1423R3 char8_t remediation (4/4)

New tests

This patch adds new tests to validate new deleted overloads of wchar_t,
char8_t, char16_t, and char32_t for ordinary and wide formatted character and
string ostream inserters.

Additionally, new tests are added to validate invocations of u8path with
sequences of char8_t for both the C++17 and filesystem TS implementations.

2019-11-29  Tom Honermann  <tom@honermann.net>

	New tests
	* testsuite/27_io/basic_ostream/inserters_character/char/deleted.cc:
	New test to validate deleted overloads of character and string
	inserters for narrow ostreams.
	* testsuite/27_io/basic_ostream/inserters_character/wchar_t/deleted.cc:
	New test to validate deleted overloads of character and string
	inserters for wide ostreams.
	* testsuite/27_io/filesystem/path/factory/u8path-char8_t.cc: New test
	to validate u8path invocations with sequences of char8_t.
	* testsuite/experimental/filesystem/path/factory/u8path-char8_t.cc:
	New test to validate u8path invocations with sequences of char8_t.

From-SVN: r278858

libstdc++-v3/ChangeLog

 2019-11-29  Tom Honermann  <tom@honermann.net>
 
+	New tests
+	* testsuite/27_io/basic_ostream/inserters_character/char/deleted.cc:
+	New test to validate deleted overloads of character and string
+	inserters for narrow ostreams.
+	* testsuite/27_io/basic_ostream/inserters_character/wchar_t/deleted.cc:
+	New test to validate deleted overloads of character and string
+	inserters for wide ostreams.
+	* testsuite/27_io/filesystem/path/factory/u8path-char8_t.cc: New test
+	to validate u8path invocations with sequences of char8_t.
+	* testsuite/experimental/filesystem/path/factory/u8path-char8_t.cc:
+	New test to validate u8path invocations with sequences of char8_t.
+
 	Updates to existing tests
 	* testsuite/experimental/feat-char8_t.cc: Updated the expected
 	__cpp_lib_char8_t feature test macro value.

libstdc++-v3/testsuite/27_io/basic_ostream/inserters_character/char/deleted.cc

+// Copyright (C) 2019 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/>.
+
+// 29.7.2 Header <ostream> synopsys; deleted character inserters.
+
+// Test character inserters defined as deleted by P1423.
+
+// { dg-options "-std=gnu++2a" }
+// { dg-do compile { target c++2a } }
+
+#include <ostream>
+
+void test_character_inserters(std::ostream &os)
+{
+  os << 'x';   // ok.
+  os << L'x';  // { dg-error "use of deleted function" }
+  os << u8'x'; // { dg-error "use of deleted function" }
+  os << u'x';  // { dg-error "use of deleted function" }
+  os << U'x';  // { dg-error "use of deleted function" }
+}
+
+void test_string_inserters(std::ostream &os)
+{
+  os << "text";  // ok.
+  os << L"text";  // { dg-error "use of deleted function" }
+  os << u8"text"; // { dg-error "use of deleted function" }
+  os << u"text";  // { dg-error "use of deleted function" }
+  os << U"text";  // { dg-error "use of deleted function" }
+}

libstdc++-v3/testsuite/27_io/basic_ostream/inserters_character/wchar_t/deleted.cc

+// Copyright (C) 2019 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/>.
+
+// 29.7.2 Header <ostream> synopsys; deleted character inserters.
+
+// Test wide character inserters defined as deleted by P1423.
+
+// { dg-options "-std=gnu++2a" }
+// { dg-do compile { target c++2a } }
+
+#include <ostream>
+
+void test_character_inserters(std::wostream &os)
+{
+  os << 'x';   // ok.
+  os << L'x';  // ok.
+  os << u8'x'; // { dg-error "use of deleted function" }
+  os << u'x';  // { dg-error "use of deleted function" }
+  os << U'x';  // { dg-error "use of deleted function" }
+}
+
+void test_string_inserters(std::wostream &os)
+{
+  os << "text";   // ok.
+  os << L"text";  // ok.
+  os << u8"text"; // { dg-error "use of deleted function" }
+  os << u"text";  // { dg-error "use of deleted function" }
+  os << U"text";  // { dg-error "use of deleted function" }
+}

libstdc++-v3/testsuite/27_io/filesystem/path/factory/u8path-char8_t.cc

+// Copyright (C) 2019 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 -fchar8_t" }
+// { dg-do run { target c++17 } }
+
+#include <filesystem>
+#include <string_view>
+#include <testsuite_hooks.h>
+
+namespace fs = std::filesystem;
+
+void
+test01()
+{
+  fs::path p = fs::u8path(u8"");
+  VERIFY( p.empty() );
+
+  p = fs::u8path(u8"filename1");
+  VERIFY( p.u8string() == u8"filename1" );
+
+  p = fs::u8path(u8"\xf0\x9d\x84\x9e");
+  VERIFY( p.u8string() == u8"\U0001D11E" );
+
+  std::u8string s1 = u8"filename2";
+  p = fs::u8path(s1);
+  VERIFY( p.u8string() == u8"filename2" );
+
+  std::u8string s2 = u8"filename3";
+  p = fs::u8path(s2.begin(), s2.end());
+  VERIFY( p.u8string() == u8"filename3" );
+
+  std::u8string_view sv1{ s1 };
+  p = fs::u8path(sv1);
+  VERIFY( p.u8string() == u8"filename2" );
+
+  std::u8string_view sv2{ s2 };
+  p = fs::u8path(sv2.begin(), sv2.end());
+  VERIFY( p.u8string() == u8"filename3" );
+}
+
+int
+main()
+{
+  test01();
+}

libstdc++-v3/testsuite/experimental/filesystem/path/factory/u8path-char8_t.cc

+// Copyright (C) 2019 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 "-lstdc++fs -fchar8_t" }
+// { dg-do run { target c++11 } }
+// { dg-require-filesystem-ts "" }
+
+#include <experimental/filesystem>
+#include <testsuite_hooks.h>
+
+namespace fs = std::experimental::filesystem;
+
+void
+test01()
+{
+  fs::path p = fs::u8path(u8"");
+  VERIFY( p.empty() );
+
+  p = fs::u8path(u8"filename1");
+  VERIFY( p.u8string() == u8"filename1" );
+
+  p = fs::u8path(u8"\xf0\x9d\x84\x9e");
+  VERIFY( p.u8string() == u8"\U0001D11E" );
+
+  std::u8string s1 = u8"filename2";
+  p = fs::u8path(s1);
+  VERIFY( p.u8string() == u8"filename2" );
+
+  std::u8string s2 = u8"filename3";
+  p = fs::u8path(s2.begin(), s2.end());
+  VERIFY( p.u8string() == u8"filename3" );
+}
+
+int
+main()
+{
+  test01();
+}