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bitset (operator[](size_t) const): Declare constexpr.

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2011-11-19  Paolo Carlini  <paolo.carlini@oracle.com>

	* include/debug/bitset (operator[](size_t) const): Declare constexpr.
	* include/profile/bitset: Likewise.
	* testsuite/23_containers/bitset/operations/constexpr.cc: Split out
	non portable bits to...
	* testsuite/23_containers/bitset/operations/constexpr-2.cc: ... here.

From-SVN: r181506
This commit is contained in:
Paolo Carlini 2011-11-19 11:50:44 +00:00 • committed by Paolo Carlini
parent cf651ca2e5
commit fc09e5b6bd
5 changed files with 52 additions and 14 deletions
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8
libstdc++-v3/ChangeLog
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@ -1,3 +1,11 @@
2011-11-19 Paolo Carlini <paolo.carlini@oracle.com>
* include/debug/bitset (operator[](size_t) const): Declare constexpr.
* include/profile/bitset: Likewise.
* testsuite/23_containers/bitset/operations/constexpr.cc: Split out
non portable bits to...
* testsuite/23_containers/bitset/operations/constexpr-2.cc: ... here.
2011-11-18 Harti Brandt <hartmut.brandt@dlr.de>
PR libstdc++/51209

9
libstdc++-v3/include/debug/bitset
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@ -51,7 +51,7 @@ namespace __debug
public:
// In C++0x we rely on normal reference type to preserve the property
// of bitset to be use as a literal.
// TODO: Find an other solution.
// TODO: Find another solution.
#ifdef __GXX_EXPERIMENTAL_CXX0X__
typedef typename _Base::reference reference;
#else
@ -272,11 +272,14 @@ namespace __debug
// _GLIBCXX_RESOLVE_LIB_DEFECTS
// 11. Bitset minor problems
bool
_GLIBCXX_CONSTEXPR bool
operator[](size_t __pos) const
{
#ifndef __GXX_EXPERIMENTAL_CXX0X__
// TODO: Check in debug-mode too.
__glibcxx_check_subscript(__pos);
return _M_base()[__pos];
#endif
return _Base::operator[](__pos);
}
using _Base::to_ulong;

4
libstdc++-v3/include/profile/bitset
View file

@ -232,10 +232,10 @@ namespace __profile
// _GLIBCXX_RESOLVE_LIB_DEFECTS
// 11. Bitset minor problems
bool
_GLIBCXX_CONSTEXPR bool
operator[](size_t __pos) const
{
return _M_base()[__pos];
return _Base::operator[](__pos);
}
using _Base::to_ulong;

36
libstdc++-v3/testsuite/23_containers/bitset/operations/constexpr-2.cc Normal file
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@ -0,0 +1,36 @@
// { dg-do compile }
// { dg-require-normal-mode "" }
// { dg-options "-std=gnu++0x" }
// Copyright (C) 2011 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 <bitset>
int main()
{
// bitset base type
typedef std::_Base_bitset<6> bitset_base;
constexpr bitset_base base = bitset_base();
constexpr auto r1 __attribute__((unused)) = base._M_getword(2);
// constexpr auto r2 = base._M_getdata(); // error, pointer to this
auto r2 __attribute__((unused)) = base._M_getdata();
constexpr auto r3 __attribute__((unused)) = base._M_hiword();
return 0;
}

9
libstdc++-v3/testsuite/23_containers/bitset/operations/constexpr.cc
View file

@ -22,15 +22,6 @@
int main()
{
// bitset base type
typedef std::_Base_bitset<6> bitset_base;
constexpr bitset_base base = bitset_base();
constexpr auto r1 __attribute__((unused)) = base._M_getword(2);
// constexpr auto r2 = base._M_getdata(); // error, pointer to this
auto r2 __attribute__((unused)) = base._M_getdata();
constexpr auto r3 __attribute__((unused)) = base._M_hiword();
// bitset operators
typedef std::bitset<6> bitset_type;
constexpr bitset_type a = bitset_type();