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cmath (pow(float, int), [...]): Do not define in C++0x mode, per DR 550. 

2008-05-26  Paolo Carlini  <paolo.carlini@oracle.com>

	* include/c_global/cmath (pow(float, int), pow(double, int),
	pow(long double, int)): Do not define in C++0x mode, per DR 550.
	* include/tr1_impl/cmath (pow): Do not bring in unconditionally
	from namespace std.
	* include/tr1/cmath (pow(double, double), pow(float, float),
	pow(long double, long double), pow(_Tp, _Up)): Define.
	* include/tr1/complex (pow): Do not bring in from namespace std.
	(pow(const std::complex<_Tp>&, int), pow(const std::complex<_Tp>&,
	const _Tp&), pow(const _Tp&, const std::complex<_Tp>&),
	pow(const std::complex<_Tp>&, const std::complex<_Tp>&)): Define.
	* include/tr1_impl/complex (pow(const std::complex<_Tp>&,
	const _Up&), pow(const _Tp&, const std::complex<_Up>&),
	pow(const std::complex<_Tp>&, const std::complex<_Up>&)): Always
	define.
	* doc/xml/manual/intro.xml: Add an entry for DR 550.
	* testsuite/26_numerics/headers/cmath/dr550.cc: New.
	* testsuite/tr1/8_c_compatibility/cmath/overloads.cc: Adjust.

From-SVN: r135955
This commit is contained in:
Paolo Carlini 2008-05-26 19:18:24 +00:00 committed by Paolo Carlini
parent ba977e1ad9
commit 774c3d8647
9 changed files with 132 additions and 11 deletions
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20
libstdc++-v3/ChangeLog
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@ -1,3 +1,23 @@
2008-05-26 Paolo Carlini <paolo.carlini@oracle.com>
* include/c_global/cmath (pow(float, int), pow(double, int),
pow(long double, int)): Do not define in C++0x mode, per DR 550.
* include/tr1_impl/cmath (pow): Do not bring in unconditionally
from namespace std.
* include/tr1/cmath (pow(double, double), pow(float, float),
pow(long double, long double), pow(_Tp, _Up)): Define.
* include/tr1/complex (pow): Do not bring in from namespace std.
(pow(const std::complex<_Tp>&, int), pow(const std::complex<_Tp>&,
const _Tp&), pow(const _Tp&, const std::complex<_Tp>&),
pow(const std::complex<_Tp>&, const std::complex<_Tp>&)): Define.
* include/tr1_impl/complex (pow(const std::complex<_Tp>&,
const _Up&), pow(const _Tp&, const std::complex<_Up>&),
pow(const std::complex<_Tp>&, const std::complex<_Up>&)): Always
define.
* doc/xml/manual/intro.xml: Add an entry for DR 550.
* testsuite/26_numerics/headers/cmath/dr550.cc: New.
* testsuite/tr1/8_c_compatibility/cmath/overloads.cc: Adjust.
2008-05-25 Paolo Carlini <paolo.carlini@oracle.com>
* include/std/tuple: Ifndef __GXX_EXPERIMENTAL_CXX0X__ just error out.

6
libstdc++-v3/doc/xml/manual/intro.xml
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@ -611,6 +611,12 @@
<listitem><para>Follow the straightforward proposed resolution.
</para></listitem></varlistentry>
<varlistentry><term><ulink url="../ext/lwg-active.html#550">550</ulink>:
<emphasis>What should the return type of pow(float,int) be?</emphasis>
</term>
<listitem><para>In C++0x mode, remove the pow(float,int), etc., signatures.
</para></listitem></varlistentry>
<varlistentry><term><ulink url="../ext/lwg-defects.html#586">586</ulink>:
<emphasis>string inserter not a formatted function</emphasis>
</term>

5
libstdc++-v3/include/c_global/cmath
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@ -367,7 +367,9 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
pow(long double __x, long double __y)
{ return __builtin_powl(__x, __y); }
// DR 550.
#ifndef __GXX_EXPERIMENTAL_CXX0X__
// _GLIBCXX_RESOLVE_LIB_DEFECTS
// DR 550. What should the return type of pow(float,int) be?
inline double
pow(double __x, int __i)
{ return __builtin_powi(__x, __i); }
@ -379,6 +381,7 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
inline long double
pow(long double __x, int __n)
{ return __builtin_powil(__x, __n); }
#endif
template<typename _Tp, typename _Up>
inline

28
libstdc++-v3/include/tr1/cmath
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@ -56,6 +56,34 @@
# undef _GLIBCXX_INCLUDE_AS_TR1
#endif
namespace std
{
namespace tr1
{
// DR 550. What should the return type of pow(float,int) be?
// NB: C++0x and TR1 != C++03.
inline double
pow(double __x, double __y)
{ return std::pow(__x, __y); }
inline float
pow(float __x, float __y)
{ return std::pow(__x, __y); }
inline long double
pow(long double __x, long double __y)
{ return std::pow(__x, __y); }
template<typename _Tp, typename _Up>
inline typename __gnu_cxx::__promote_2<_Tp, _Up>::__type
pow(_Tp __x, _Up __y)
{
typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
return std::pow(__type(__x), __type(__y));
}
}
}
#include <bits/stl_algobase.h>
#include <limits>
#include <tr1/type_traits>

22
libstdc++-v3/include/tr1/complex
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@ -75,9 +75,27 @@ namespace tr1
}
using std::real;
using std::pow;
template<typename _Tp>
inline std::complex<_Tp>
pow(const std::complex<_Tp>& __x, int __n)
{ return std::pow(__x, __n); }
template<typename _Tp>
inline std::complex<_Tp>
pow(const std::complex<_Tp>& __x, const _Tp& __y)
{ return std::pow(__x, __y); }
template<typename _Tp>
inline std::complex<_Tp>
pow(const _Tp& __x, const std::complex<_Tp>& __y)
{ return std::pow(__x, __y); }
template<typename _Tp>
inline std::complex<_Tp>
pow(const std::complex<_Tp>& __x, const std::complex<_Tp>& __y)
{ return std::pow(__x, __y); }
}
}
#endif // _GLIBCXX_TR1_COMPLEX

4
libstdc++-v3/include/tr1_impl/cmath
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@ -763,7 +763,9 @@ _GLIBCXX_BEGIN_NAMESPACE_TR1
return nexttoward(__type(__x), __y);
}
using std::pow;
// DR 550. What should the return type of pow(float,int) be?
// NB: C++0x and TR1 != C++03.
// using std::pow;
inline float
remainder(float __x, float __y)

7
libstdc++-v3/include/tr1_impl/complex
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@ -301,12 +301,11 @@ _GLIBCXX_BEGIN_NAMESPACE_TR1
fabs(const std::complex<_Tp>& __z)
{ return std::abs(__z); }
/// Additional overloads [8.1.9].
#if (defined(_GLIBCXX_INCLUDE_AS_CXX0X) \
|| (defined(_GLIBCXX_INCLUDE_AS_TR1) \
&& !defined(__GXX_EXPERIMENTAL_CXX0X__)))
/// Additional overloads [8.1.9].
template<typename _Tp>
inline typename __gnu_cxx::__promote<_Tp>::__type
arg(_Tp __x)
@ -338,6 +337,8 @@ _GLIBCXX_BEGIN_NAMESPACE_TR1
real(_Tp __x)
{ return __x; }
#endif
template<typename _Tp, typename _Up>
inline std::complex<typename __gnu_cxx::__promote_2<_Tp, _Up>::__type>
pow(const std::complex<_Tp>& __x, const _Up& __y)
@ -363,7 +364,5 @@ _GLIBCXX_BEGIN_NAMESPACE_TR1
std::complex<__type>(__y));
}
#endif
_GLIBCXX_END_NAMESPACE_TR1
}

47
libstdc++-v3/testsuite/26_numerics/headers/cmath/dr550.cc Normal file
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@ -0,0 +1,47 @@
// { dg-options "-std=gnu++0x" }
// 2008-05-26 Paolo Carlini <paolo.carlini@oracle.com>
//
// Copyright (C) 2008 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 2, 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 COPYING. If not, write to the Free
// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
// USA.
#include <cmath>
#include <testsuite_hooks.h>
#include <testsuite_tr1.h>
// DR 550. What should the return type of pow(float,int) be?
void test01()
{
bool test __attribute__((unused)) = true;
using __gnu_test::check_ret_type;
const int i1 = 1;
const float f1 = 1.0f;
const double d1 = 1.0;
const long double ld1 = 1.0l;
check_ret_type<double>(std::pow(f1, i1));
VERIFY( std::pow(f1, i1) == std::pow(double(f1), double(i1)) );
check_ret_type<double>(std::pow(d1, i1));
check_ret_type<long double>(std::pow(ld1, i1));
}
int main()
{
test01();
return 0;
}

4
libstdc++-v3/testsuite/tr1/8_c_compatibility/cmath/overloads.cc
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@ -206,9 +206,7 @@ void test01()
check_ret_type<long double>(std::tr1::pow(ld0, d0));
check_ret_type<double>(std::tr1::pow(i0, i0));
check_ret_type<double>(std::tr1::pow(d0, i0));
// DR 550.
// check_ret_type<double>(std::tr1::pow(f0, i0));
check_ret_type<float>(std::tr1::pow(f0, i0));
check_ret_type<double>(std::tr1::pow(f0, i0));
check_ret_type<double>(std::tr1::remainder(d0, d0));
check_ret_type<double>(std::tr1::remainder(d0, f0));