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type_traits: Implement alignment_of and aligned_storage.

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2005-01-11  Paolo Carlini  <pcarlini@suse.de>

	* include/tr1/type_traits: Implement alignment_of and aligned_storage.
	* testsuite/tr1/4_metaprogramming/other_transformations/
	aligned_storage/aligned_storage.cc: New.
	* testsuite/tr1/4_metaprogramming/other_transformations/
	aligned_storage/typedefs.cc: Likewise.
	* testsuite/tr1/4_metaprogramming/type_properties/
	alignment_of/alignment_of.cc: Likewise.
	* testsuite/tr1/4_metaprogramming/type_properties/
	alignment_of/typedefs.cc: Likewise.

From-SVN: r93183
This commit is contained in:
Paolo Carlini 2005-01-11 12:29:31 +00:00 committed by Paolo Carlini
parent 6b78f6bee5
commit 464b277ba2
6 changed files with 269 additions and 5 deletions
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12
libstdc++-v3/ChangeLog
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@ -1,3 +1,15 @@
2005-01-11 Paolo Carlini <pcarlini@suse.de>
* include/tr1/type_traits: Implement alignment_of and aligned_storage.
* testsuite/tr1/4_metaprogramming/other_transformations/
aligned_storage/aligned_storage.cc: New.
* testsuite/tr1/4_metaprogramming/other_transformations/
aligned_storage/typedefs.cc: Likewise.
* testsuite/tr1/4_metaprogramming/type_properties/
alignment_of/alignment_of.cc: Likewise.
* testsuite/tr1/4_metaprogramming/type_properties/
alignment_of/typedefs.cc: Likewise.
2005-01-10 Paolo Carlini <pcarlini@suse.de>
* Makefile.in: Regenerate.

85
libstdc++-v3/include/tr1/type_traits
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@ -1,6 +1,6 @@
// TR1 type_traits -*- C++ -*-
// Copyright (C) 2004 Free Software Foundation, Inc.
// Copyright (C) 2004, 2005 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
@ -144,10 +144,10 @@ namespace tr1
// template<typename>
// struct is_member_function_pointer
// : public false_type { };
// _DEFINE_SPEC(2, is_member_function_pointer, _Tp _Cp::*,
// is_function<_Tp>::value)
// Ugly, temporary workaround for member functions with up to 15 arguments.
// _DEFINE_SPEC(2, is_member_function_pointer, _Tp _Cp::*,
// is_function<_Tp>::value)
//
// Temporary workaround for member functions with up to 15 arguments:
template<typename>
struct __is_mfp_helper
{ static const bool __value = false; };
@ -516,6 +516,10 @@ namespace tr1
template<typename>
struct has_virtual_destructor
: public false_type { };
template<typename _Tp>
struct alignment_of
: public integral_constant<std::size_t, __alignof__(_Tp)> { };
template<typename>
struct rank
@ -652,6 +656,77 @@ namespace tr1
{ typedef typename remove_reference<_Tp>::type* type; };
/// @brief other transformations [4.8].
// Due to c++/19163 and c++/17743, for the time being we cannot use
// the correct, neat implementation :-(
//
// template<std::size_t _Len, std::size_t _Align>
// struct aligned_storage
// { typedef char type[_Len] __attribute__((aligned(_Align))); }
//
// Temporary workaround, useful for Align up to 32:
template<std::size_t, std::size_t>
struct aligned_storage { };
template<std::size_t _Len>
struct aligned_storage<_Len, 1>
{
union type
{
unsigned char __data[_Len];
char __align __attribute__((aligned(1)));
};
};
template<std::size_t _Len>
struct aligned_storage<_Len, 2>
{
union type
{
unsigned char __data[_Len];
char __align __attribute__((aligned(2)));
};
};
template<std::size_t _Len>
struct aligned_storage<_Len, 4>
{
union type
{
unsigned char __data[_Len];
char __align __attribute__((aligned(4)));
};
};
template<std::size_t _Len>
struct aligned_storage<_Len, 8>
{
union type
{
unsigned char __data[_Len];
char __align __attribute__((aligned(8)));
};
};
template<std::size_t _Len>
struct aligned_storage<_Len, 16>
{
union type
{
unsigned char __data[_Len];
char __align __attribute__((aligned(16)));
};
};
template<std::size_t _Len>
struct aligned_storage<_Len, 32>
{
union type
{
unsigned char __data[_Len];
char __align __attribute__((aligned(32)));
};
};
#undef _DEFINE_SPEC_0_HELPER
#undef _DEFINE_SPEC_1_HELPER

63
libstdc++-v3/testsuite/tr1/4_metaprogramming/other_transformations/aligned_storage/aligned_storage.cc Normal file
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@ -0,0 +1,63 @@
// 2005-01-11 Paolo Carlini <pcarlini@suse.de>
//
// Copyright (C) 2005 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.
// 4.8 Other transformations
#include <tr1/type_traits>
#include <testsuite_hooks.h>
#include <testsuite_tr1.h>
void test01()
{
bool test __attribute__((unused)) = true;
using std::tr1::aligned_storage;
using std::tr1::alignment_of;
using namespace __gnu_test;
const std::size_t align_c = alignment_of<char>::value;
VERIFY( (sizeof(aligned_storage<4, align_c>::type) >= 4) );
VERIFY( (__alignof__(aligned_storage<4, align_c>::type) == align_c) );
const std::size_t align_s = alignment_of<short>::value;
VERIFY( (sizeof(aligned_storage<1, align_s>::type) >= 1) );
VERIFY( (__alignof__(aligned_storage<1, align_s>::type) == align_s) );
const std::size_t align_i = alignment_of<int>::value;
VERIFY( (sizeof(aligned_storage<7, align_i>::type) >= 7) );
VERIFY( (__alignof__(aligned_storage<7, align_i>::type) == align_i) );
const std::size_t align_d = alignment_of<double>::value;
VERIFY( (sizeof(aligned_storage<2, align_d>::type) >= 2) );
VERIFY( (__alignof__(aligned_storage<2, align_d>::type) == align_d) );
const std::size_t align_ai = alignment_of<int[4]>::value;
VERIFY( (sizeof(aligned_storage<20, align_ai>::type) >= 20) );
VERIFY( (__alignof__(aligned_storage<20, align_ai>::type) == align_ai) );
const std::size_t align_ct = alignment_of<ClassType>::value;
VERIFY( (sizeof(aligned_storage<11, align_ct>::type) >= 11) );
VERIFY( (__alignof__(aligned_storage<11, align_ct>::type) == align_ct) );
}
int main()
{
test01();
return 0;
}

33
libstdc++-v3/testsuite/tr1/4_metaprogramming/other_transformations/aligned_storage/typedefs.cc Normal file
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@ -0,0 +1,33 @@
// 2005-01-11 Paolo Carlini <pcarlini@suse.de>
//
// Copyright (C) 2005 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.
//
// NB: This file is for testing tr1/type_traits with NO OTHER INCLUDES.
#include <tr1/type_traits>
// { dg-do compile }
void test01()
{
// Check for required typedefs
typedef std::tr1::aligned_storage<1, 1> test_type;
typedef test_type::type type;
}

45
libstdc++-v3/testsuite/tr1/4_metaprogramming/type_properties/alignment_of/alignment_of.cc Normal file
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@ -0,0 +1,45 @@
// 2005-01-11 Paolo Carlini <pcarlini@suse.de>
//
// Copyright (C) 2005 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.
// 4.5.3 Type properties
#include <tr1/type_traits>
#include <testsuite_hooks.h>
#include <testsuite_tr1.h>
void test01()
{
bool test __attribute__((unused)) = true;
using std::tr1::alignment_of;
using namespace __gnu_test;
VERIFY( (test_property<alignment_of, char>(__alignof__(char))) );
VERIFY( (test_property<alignment_of, short>(__alignof__(short))) );
VERIFY( (test_property<alignment_of, int>(__alignof__(int))) );
VERIFY( (test_property<alignment_of, double>(__alignof__(double))) );
VERIFY( (test_property<alignment_of, int[4]>(__alignof__(int[4]))) );
VERIFY( (test_property<alignment_of, ClassType>(__alignof__(ClassType))) );
}
int main()
{
test01();
return 0;
}

36
libstdc++-v3/testsuite/tr1/4_metaprogramming/type_properties/alignment_of/typedefs.cc Normal file
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@ -0,0 +1,36 @@
// 2005-01-11 Paolo Carlini <pcarlini@suse.de>
//
// Copyright (C) 2005 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.
//
// NB: This file is for testing tr1/type_traits with NO OTHER INCLUDES.
#include <tr1/type_traits>
// { dg-do compile }
void test01()
{
// Check for required typedefs
typedef std::tr1::alignment_of<int> test_type;
typedef test_type::value_type value_type;
typedef test_type::type type;
typedef test_type::type::value_type type_value_type;
typedef test_type::type::type type_type;
}