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re PR libstdc++/57704 (std::char_traits<char>::lt is not standards-compliant)

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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.

From-SVN: r200392
This commit is contained in:
Paolo Carlini 2013-06-25 08:39:31 +00:00 committed by Paolo Carlini
parent 8a845901e4
commit 6cdbb7e8a1
3 changed files with 49 additions and 1 deletions
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7
libstdc++-v3/ChangeLog
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@ -1,3 +1,10 @@
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

6
libstdc++-v3/include/bits/char_traits.h
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@ -248,7 +248,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
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)

37
libstdc++-v3/testsuite/21_strings/char_traits/requirements/char/57704.cc Normal file
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@ -0,0 +1,37 @@
// 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;
}