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limits: Implement resolution of DR 559 (CD1) in C++0x mode. 

2010-02-17  Paolo Carlini  <paolo.carlini@oracle.com>

	* include/std/limits: Implement resolution of DR 559 (CD1) in
	C++0x mode.
	* testsuite/18_support/numeric_limits/dr559.cc: New.

From-SVN: r156830
This commit is contained in:
Paolo Carlini 2010-02-17 12:18:54 +00:00 committed by Paolo Carlini
parent 96e41f1611
commit ce4674f2a6
3 changed files with 125 additions and 5 deletions
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6
libstdc++-v3/ChangeLog
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@ -1,3 +1,9 @@
2010-02-17 Paolo Carlini <paolo.carlini@oracle.com>
* include/std/limits: Implement resolution of DR 559 (CD1) in
C++0x mode.
* testsuite/18_support/numeric_limits/dr559.cc: New.
2010-02-16 Benjamin Kosnik <bkoz@redhat.com>
* src/ios_locale.cc: Fixes for -pedantic.

24
libstdc++-v3/include/std/limits
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@ -45,10 +45,10 @@
//
// The numeric_limits<> traits document implementation-defined aspects
// of fundamental arithmetic data types (integers and floating points).
// From Standard C++ point of view, there are 13 such types:
// From Standard C++ point of view, there are 14 such types:
// * integers
// bool (1)
// char, signed char, unsigned char (3)
// char, signed char, unsigned char, wchar_t (4)
// short, unsigned short (2)
// int, unsigned (2)
// long, unsigned long (2)
@ -62,7 +62,7 @@
// * integer
// long long, unsigned long long (2)
//
// which brings us to 15 fundamental arithmetic data types in GNU C++.
// which brings us to 16 fundamental arithmetic data types in GNU C++.
//
//
// Since a numeric_limits<> is a bit tricky to get right, we rely on
@ -302,8 +302,22 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
static _Tp denorm_min() throw() { return static_cast<_Tp>(0); }
};
// Now there follow 15 explicit specializations. Yes, 15. Make sure
// you get the count right.
#ifdef __GXX_EXPERIMENTAL_CXX0X__
template<typename _Tp>
struct numeric_limits<const _Tp>
: public numeric_limits<_Tp> { };
template<typename _Tp>
struct numeric_limits<volatile _Tp>
: public numeric_limits<_Tp> { };
template<typename _Tp>
struct numeric_limits<const volatile _Tp>
: public numeric_limits<_Tp> { };
#endif
// Now there follow 16 explicit specializations. Yes, 16. Make sure
// you get the count right. (18 in c++0x mode)
/// numeric_limits<bool> specialization.
template<>

100
libstdc++-v3/testsuite/18_support/numeric_limits/dr559.cc Normal file
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@ -0,0 +1,100 @@
// { dg-options "-std=gnu++0x" }
// 2010-02-17 Paolo Carlini <paolo.carlini@oracle.com>
//
// Copyright (C) 2010 Free Software Foundation
//
// 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 <limits>
#include <type_traits>
#include <testsuite_hooks.h>
template<typename T>
void do_test_aux()
{
bool test __attribute__((unused)) = true;
typedef std::numeric_limits<T> cv_limits;
typedef std::numeric_limits<typename std::remove_cv<T>::type> limits;
VERIFY( cv_limits::is_specialized == limits::is_specialized );
VERIFY( cv_limits::min() == limits::min() );
VERIFY( cv_limits::max() == limits::max() );
VERIFY( cv_limits::digits == limits::digits );
VERIFY( cv_limits::digits10 == limits::digits10 );
VERIFY( cv_limits::is_signed == limits::is_signed );
VERIFY( cv_limits::is_integer == limits::is_integer );
VERIFY( cv_limits::is_exact == limits::is_exact );
VERIFY( cv_limits::radix == limits::radix );
VERIFY( cv_limits::epsilon() == limits::epsilon() );
VERIFY( cv_limits::round_error() == limits::round_error() );
VERIFY( cv_limits::min_exponent == limits::min_exponent );
VERIFY( cv_limits::min_exponent10 == limits::min_exponent10 );
VERIFY( cv_limits::max_exponent == limits::max_exponent );
VERIFY( cv_limits::max_exponent10 == limits::max_exponent10 );
VERIFY( cv_limits::has_infinity == limits::has_infinity );
VERIFY( cv_limits::has_quiet_NaN == limits::has_quiet_NaN );
VERIFY( cv_limits::has_signaling_NaN == limits::has_signaling_NaN );
VERIFY( cv_limits::has_denorm == limits::has_denorm );
VERIFY( cv_limits::has_denorm_loss == limits::has_denorm_loss );
VERIFY( cv_limits::infinity() == limits::infinity() );
if (!std::is_floating_point<T>::value)
{
VERIFY( cv_limits::quiet_NaN() == limits::quiet_NaN() );
VERIFY( cv_limits::signaling_NaN() == limits::signaling_NaN() );
}
VERIFY( cv_limits::denorm_min() == limits::denorm_min() );
VERIFY( cv_limits::is_iec559 == limits::is_iec559 );
VERIFY( cv_limits::is_bounded == limits::is_bounded );
VERIFY( cv_limits::is_modulo == limits::is_modulo );
VERIFY( cv_limits::traps == limits::traps );
VERIFY( cv_limits::tinyness_before == limits::tinyness_before );
VERIFY( cv_limits::round_style == limits::round_style );
}
template<typename T>
void
do_test()
{
do_test_aux<T>();
do_test_aux<const T>();
do_test_aux<volatile T>();
do_test_aux<const volatile T>();
}
// DR 559.
int main()
{
do_test<bool>();
do_test<char>();
do_test<signed char>();
do_test<unsigned char>();
do_test<wchar_t>();
do_test<char16_t>();
do_test<char32_t>();
do_test<short>();
do_test<unsigned short>();
do_test<int>();
do_test<unsigned int>();
do_test<long>();
do_test<unsigned long>();
do_test<long long>();
do_test<unsigned long long>();
do_test<float>();
do_test<double>();
do_test<long double>();
return 0;
}