+2013-06-25 Paolo Carlini <paolo.carlini@oracle.com>
+
+ PR libstdc++/57704
+ * include/bits/char_traits.h (char_traits<char>::lt): Implement
+ LWG 467.
+ * testsuite/21_strings/char_traits/requirements/char/57704.cc: New.
+
2013-06-24 Bernd Edlinger <bernd.edlinger@hotmail.de>
PR libstdc++/57691
static _GLIBCXX_CONSTEXPR bool
lt(const char_type& __c1, const char_type& __c2) _GLIBCXX_NOEXCEPT
- { return __c1 < __c2; }
+ {
+ // LWG 467.
+ return (static_cast<unsigned char>(__c1)
+ < static_cast<unsigned char>(__c2));
+ }
static int
compare(const char_type* __s1, const char_type* __s2, size_t __n)
--- /dev/null
+// Copyright (C) 2013 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/>.
+
+#include <string>
+#include <testsuite_hooks.h>
+
+void test01()
+{
+ bool test __attribute__((unused)) = true;
+
+ char a = '\x7f';
+ char b = '\x80';
+
+ VERIFY( (std::char_traits<char>::lt(a, b)
+ == (static_cast<unsigned char>(a)
+ < static_cast<unsigned char>(b))) );
+}
+
+int main()
+{
+ test01();
+ return 0;
+}