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type_traits: Implement is_function.

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2004-12-16  Paolo Carlini  <pcarlini@suse.de>

	* include/tr1/type_traits: Implement is_function.
	(struct __sfinae_types, struct __is_function_helper): New.
	* testsuite/tr1/4_metaprogramming/composite_type_traits/
	is_object/is_object.cc: New.
	* testsuite/tr1/4_metaprogramming/composite_type_traits/
	is_object/typedefs.cc: Likewise.
	* testsuite/tr1/4_metaprogramming/primary_type_categories/
	is_function/is_function.cc: Likewise.
	* testsuite/tr1/4_metaprogramming/primary_type_categories/
	is_function/typedefs.cc: Likewise.

From-SVN: r92258
This commit is contained in:
Paolo Carlini 2004-12-16 11:35:56 +00:00 committed by Paolo Carlini
parent 8a784e4a17
commit cacd0a2ccf
6 changed files with 226 additions and 12 deletions
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13
libstdc++-v3/ChangeLog
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@ -1,3 +1,16 @@
2004-12-16 Paolo Carlini <pcarlini@suse.de>
* include/tr1/type_traits: Implement is_function.
(struct __sfinae_types, struct __is_function_helper): New.
* testsuite/tr1/4_metaprogramming/composite_type_traits/
is_object/is_object.cc: New.
* testsuite/tr1/4_metaprogramming/composite_type_traits/
is_object/typedefs.cc: Likewise.
* testsuite/tr1/4_metaprogramming/primary_type_categories/
is_function/is_function.cc: Likewise.
* testsuite/tr1/4_metaprogramming/primary_type_categories/
is_function/typedefs.cc: Likewise.
2004-12-13 Paolo Carlini <pcarlini@suse.de>
* include/tr1/type_traits (extent): Minor tweak (i.e., public).

52
libstdc++-v3/include/tr1/type_traits
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@ -28,21 +28,17 @@
#include <bits/c++config.h>
#include <cstddef>
//namespace std::tr1
// namespace std::tr1
namespace std
{
namespace tr1
{
/// @brief helper classes [4.3].
template<typename _Tp, _Tp __v>
struct integral_constant
{
static const _Tp value = __v;
typedef _Tp value_type;
typedef integral_constant<_Tp, __v> type;
};
typedef integral_constant<bool, true> true_type;
typedef integral_constant<bool, false> false_type;
// For use in is_function and elsewhere.
struct __sfinae_types
{
typedef char __one;
typedef struct { char __arr[2]; } __two;
};
#define _DEFINE_SPEC_HELPER(_Header, _Spec) \
template _Header \
@ -55,6 +51,17 @@ namespace tr1
_DEFINE_SPEC_HELPER(_Header, _Trait<_Type volatile>) \
_DEFINE_SPEC_HELPER(_Header, _Trait<_Type const volatile>)
/// @brief helper classes [4.3].
template<typename _Tp, _Tp __v>
struct integral_constant
{
static const _Tp value = __v;
typedef _Tp value_type;
typedef integral_constant<_Tp, __v> type;
};
typedef integral_constant<bool, true> true_type;
typedef integral_constant<bool, false> false_type;
/// @brief primary type categories [4.5.1].
template<typename>
struct is_void
@ -126,9 +133,30 @@ namespace tr1
template<typename _Tp>
struct is_class;
template<typename _Tp>
struct __is_function_helper
: public __sfinae_types
{
private:
template<typename>
static __one
__test(...);
template<typename _Up>
static __two
__test(_Up (*) [1]);
public:
static const bool __value = sizeof(__test<_Tp>(0)) == 1;
};
template<typename _Tp>
struct is_function;
struct is_function
: public integral_constant<bool, (__is_function_helper<_Tp>::__value
&& !is_reference<_Tp>::value
&& !is_void<_Tp>::value)>
{ };
/// @brief composite type traits [4.5.2].
template<typename _Tp>

50
libstdc++-v3/testsuite/tr1/4_metaprogramming/composite_type_traits/is_object/is_object.cc Normal file
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@ -0,0 +1,50 @@
// 2004-12-16 Paolo Carlini <pcarlini@suse.de>
//
// Copyright (C) 2004 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.
// 4.5.2 Composite type traits
#include <tr1/type_traits>
#include <testsuite_hooks.h>
#include <testsuite_tr1.h>
void test01()
{
bool test __attribute__((unused)) = true;
using std::tr1::is_object;
using namespace __gnu_test;
VERIFY( (test_category<is_object, int (int)>(false)) );
VERIFY( (test_category<is_object, ClassType (ClassType)>(false)) );
VERIFY( (test_category<is_object, float (int, float, int[], int&)>(false)) );
VERIFY( (test_category<is_object, int&>(false)) );
VERIFY( (test_category<is_object, ClassType&>(false)) );
VERIFY( (test_category<is_object, int(&)(int)>(false)) );
VERIFY( (test_category<is_object, void>(false)) );
VERIFY( (test_category<is_object, const void>(false)) );
// Sanity check.
VERIFY( (test_category<is_object, ClassType>(true)) );
}
int main()
{
test01();
return 0;
}

36
libstdc++-v3/testsuite/tr1/4_metaprogramming/composite_type_traits/is_object/typedefs.cc Normal file
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@ -0,0 +1,36 @@
// 2004-12-16 Paolo Carlini <pcarlini@suse.de>
//
// Copyright (C) 2004 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::is_object<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;
}

51
libstdc++-v3/testsuite/tr1/4_metaprogramming/primary_type_categories/is_function/is_function.cc Normal file
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@ -0,0 +1,51 @@
// 2004-12-16 Paolo Carlini <pcarlini@suse.de>
//
// Copyright (C) 2004 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.
// 4.5.1 Primary type categories
#include <tr1/type_traits>
#include <testsuite_hooks.h>
#include <testsuite_tr1.h>
void test01()
{
bool test __attribute__((unused)) = true;
using std::tr1::is_function;
using namespace __gnu_test;
// Positive tests.
VERIFY( (test_category<is_function, int (int)>(true)) );
VERIFY( (test_category<is_function, ClassType (ClassType)>(true)) );
VERIFY( (test_category<is_function, float (int, float, int[], int&)>(true)) );
// Negative tests.
VERIFY( (test_category<is_function, int&>(false)) );
VERIFY( (test_category<is_function, void>(false)) );
VERIFY( (test_category<is_function, const void>(false)) );
// Sanity check.
VERIFY( (test_category<is_function, ClassType>(false)) );
}
int main()
{
test01();
return 0;
}

36
libstdc++-v3/testsuite/tr1/4_metaprogramming/primary_type_categories/is_function/typedefs.cc Normal file
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@ -0,0 +1,36 @@
// 2004-12-16 Paolo Carlini <pcarlini@suse.de>
//
// Copyright (C) 2004 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::is_function<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;
}