libstdc++-v3/testsuite/util/testsuite_allocator.h - chromiumos/third_party/gcc - Git at Google

 // -*- C++ -*-
 // Testing allocator for the C++ library testsuite.
 //
 // Copyright (C) 2002-2013 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/>.
 //

 // This file provides an test instrumentation allocator that can be
 // used to verify allocation functionality of standard library
 // containers.  2002.11.25 smw

 #ifndef _GLIBCXX_TESTSUITE_ALLOCATOR_H
 #define _GLIBCXX_TESTSUITE_ALLOCATOR_H

 #include <tr1/unordered_map>
 #include <bits/move.h>
 #include <testsuite_hooks.h>

 namespace __gnu_test
 {
   class tracker_allocator_counter
   {
   public:
     typedef std::size_t    size_type;

     static void*
     allocate(size_type blocksize)
     {
       void* p = ::operator new(blocksize);
       allocationCount_ += blocksize;
       return p;
     }

     static void
     construct() { constructCount_++; }

     static void
     destroy() { destructCount_++; }

     static void
     deallocate(void* p, size_type blocksize)
     {
       ::operator delete(p);
       deallocationCount_ += blocksize;
     }

     static size_type
     get_allocation_count() { return allocationCount_; }

     static size_type
     get_deallocation_count() { return deallocationCount_; }

     static int
     get_construct_count() { return constructCount_; }

     static int
     get_destruct_count() { return destructCount_; }

     static void
     reset()
     {
       allocationCount_ = 0;
       deallocationCount_ = 0;
       constructCount_ = 0;
       destructCount_ = 0;
     }

  private:
     static size_type  allocationCount_;
     static size_type  deallocationCount_;
     static int        constructCount_;
     static int        destructCount_;
   };

   // A simple basic allocator that just forwards to the
   // tracker_allocator_counter to fulfill memory requests.  This class
   // is templated on the target object type, but tracker isn't.
   template<class T>
   class tracker_allocator
   {
   private:
     typedef tracker_allocator_counter counter_type;

   public:
     typedef T              value_type;
     typedef T*             pointer;
     typedef const T*       const_pointer;
     typedef T&             reference;
     typedef const T&       const_reference;
     typedef std::size_t    size_type;
     typedef std::ptrdiff_t difference_type;

     template<class U> struct rebind { typedef tracker_allocator<U> other; };

     pointer
     address(reference value) const _GLIBCXX_NOEXCEPT
     { return std::__addressof(value); }

     const_pointer
     address(const_reference value) const _GLIBCXX_NOEXCEPT
     { return std::__addressof(value); }

     tracker_allocator() _GLIBCXX_USE_NOEXCEPT
     { }

     tracker_allocator(const tracker_allocator&) _GLIBCXX_USE_NOEXCEPT
     { }

     template<class U>
       tracker_allocator(const tracker_allocator<U>&) _GLIBCXX_USE_NOEXCEPT
       { }

     ~tracker_allocator() _GLIBCXX_USE_NOEXCEPT
     { }

     size_type
     max_size() const _GLIBCXX_USE_NOEXCEPT
     { return size_type(-1) / sizeof(T); }

     pointer
     allocate(size_type n, const void* = 0)
     { return static_cast<pointer>(counter_type::allocate(n * sizeof(T))); }

 #if __cplusplus >= 201103L
     template<typename U, typename... Args>
       void
       construct(U* p, Args&&... args)
       {
 	::new((void *)p) U(std::forward<Args>(args)...);
 	counter_type::construct();
       }

     template<typename U>
       void
       destroy(U* p)
       {
 	p->~U();
 	counter_type::destroy();
       }
 #else
     void
     construct(pointer p, const T& value)
     {
       ::new ((void *)p) T(value);
       counter_type::construct();
     }

     void
     destroy(pointer p)
     {
       p->~T();
       counter_type::destroy();
     }
 #endif

     void
     deallocate(pointer p, size_type num)
     { counter_type::deallocate(p, num * sizeof(T)); }
   };

   template<class T1, class T2>
     bool
     operator==(const tracker_allocator<T1>&,
 	       const tracker_allocator<T2>&) throw()
     { return true; }

   template<class T1, class T2>
     bool
     operator!=(const tracker_allocator<T1>&,
 	       const tracker_allocator<T2>&) throw()
     { return false; }

   bool
   check_construct_destroy(const char* tag, int expected_c, int expected_d);

   template<typename Alloc>
     bool
     check_deallocate_null()
     {
       // Let's not core here...
       Alloc  a;
       a.deallocate(0, 1);
       a.deallocate(0, 10);
       return true;
     }

   template<typename Alloc>
     bool
     check_allocate_max_size()
     {
       Alloc a;
       try
 	{
 	  a.allocate(a.max_size() + 1);
 	}
       catch(std::bad_alloc&)
 	{
 	  return true;
 	}
       catch(...)
 	{
 	  throw;
 	}
       throw;
     }


   // A simple allocator which can be constructed endowed of a given
   // "personality" (an integer), queried in operator== to simulate the
   // behavior of realworld "unequal" allocators (i.e., not exploiting
   // the provision in 20.1.5/4, first bullet).  A global unordered_map,
   // filled at allocation time with (pointer, personality) pairs, is
   // then consulted to enforce the requirements in Table 32 about
   // deallocation vs allocator equality.  Note that this allocator is
   // swappable, not assignable, consistently with Option 3 of DR 431
   // (see N1599).
   struct uneq_allocator_base
   {
     typedef std::tr1::unordered_map<void*, int>   map_type;

     // Avoid static initialization troubles and/or bad interactions
     // with tests linking testsuite_allocator.o and playing globally
     // with operator new/delete.
     static map_type&
     get_map()
     {
       static map_type alloc_map;
       return alloc_map;
     }
   };

   template<typename Tp>
     class uneq_allocator
     : private uneq_allocator_base
     {
     public:
       typedef std::size_t                         size_type;
       typedef std::ptrdiff_t                      difference_type;
       typedef Tp*                                 pointer;
       typedef const Tp*                           const_pointer;
       typedef Tp&                                 reference;
       typedef const Tp&                           const_reference;
       typedef Tp                                  value_type;

 #if __cplusplus >= 201103L
       typedef std::true_type                      propagate_on_container_swap;
 #endif

       template<typename Tp1>
         struct rebind
 	{ typedef uneq_allocator<Tp1> other; };

       uneq_allocator() _GLIBCXX_USE_NOEXCEPT
       : personality(0) { }

       uneq_allocator(int person) _GLIBCXX_USE_NOEXCEPT
       : personality(person) { }

       template<typename Tp1>
         uneq_allocator(const uneq_allocator<Tp1>& b) _GLIBCXX_USE_NOEXCEPT
 	: personality(b.get_personality()) { }

       ~uneq_allocator() _GLIBCXX_USE_NOEXCEPT
       { }

       int get_personality() const { return personality; }

       pointer
       address(reference x) const _GLIBCXX_NOEXCEPT
       { return std::__addressof(x); }

       const_pointer
       address(const_reference x) const _GLIBCXX_NOEXCEPT
       { return std::__addressof(x); }

       pointer
       allocate(size_type n, const void* = 0)
       {
 	if (__builtin_expect(n > this->max_size(), false))
 	  std::__throw_bad_alloc();

 	pointer p = static_cast<Tp*>(::operator new(n * sizeof(Tp)));
 	try
 	  {
 	    get_map().insert(map_type::value_type(reinterpret_cast<void*>(p),
 						  personality));
 	  }
 	catch(...)
 	  {
 	    ::operator delete(p);
 	    __throw_exception_again;
 	  }
 	return p;
       }

       void
       deallocate(pointer p, size_type)
       {
 	bool test __attribute__((unused)) = true;

 	VERIFY( p );

 	map_type::iterator it = get_map().find(reinterpret_cast<void*>(p));
 	VERIFY( it != get_map().end() );

 	// Enforce requirements in Table 32 about deallocation vs
 	// allocator equality.
 	VERIFY( it->second == personality );

 	get_map().erase(it);
 	::operator delete(p);
       }

       size_type
       max_size() const _GLIBCXX_USE_NOEXCEPT
       { return size_type(-1) / sizeof(Tp); }

 #if __cplusplus >= 201103L
       template<typename U, typename... Args>
         void
         construct(U* p, Args&&... args)
 	{ ::new((void *)p) U(std::forward<Args>(args)...); }

       template<typename U>
 	void
 	destroy(U* p) { p->~U(); }

       // Not copy assignable...
       uneq_allocator&
       operator=(const uneq_allocator&) = delete;
 #else
       void
       construct(pointer p, const Tp& val)
       { ::new((void *)p) Tp(val); }

       void
       destroy(pointer p) { p->~Tp(); }

     private:
       // Not assignable...
       uneq_allocator&
       operator=(const uneq_allocator&);
 #endif

     private:

       // ... yet swappable!
       friend inline void
       swap(uneq_allocator& a, uneq_allocator& b)
       { std::swap(a.personality, b.personality); }

       template<typename Tp1>
         friend inline bool
         operator==(const uneq_allocator& a, const uneq_allocator<Tp1>& b)
         { return a.personality == b.personality; }

       template<typename Tp1>
         friend inline bool
         operator!=(const uneq_allocator& a, const uneq_allocator<Tp1>& b)
         { return !(a == b); }

       int personality;
     };

 #if __cplusplus >= 201103L
   // An uneq_allocator which can be used to test allocator propagation.
   template<typename Tp, bool Propagate>
     class propagating_allocator : public uneq_allocator<Tp>
     {
       typedef uneq_allocator<Tp> base_alloc;
       base_alloc& base() { return *this; }
       const base_alloc& base() const  { return *this; }
       void swap_base(base_alloc& b) { swap(b, this->base()); }

       typedef std::integral_constant<bool, Propagate> trait_type;

     public:
       // default allocator_traits::rebind_alloc would select
       // uneq_allocator::rebind so we must define rebind here
       template<typename Up>
 	struct rebind { typedef propagating_allocator<Up, Propagate> other; };

       propagating_allocator(int i) noexcept
       : base_alloc(i)
       { }

       template<typename Up>
 	propagating_allocator(const propagating_allocator<Up, Propagate>& a)
        	noexcept
 	: base_alloc(a)
 	{ }

       propagating_allocator() noexcept = default;

       propagating_allocator(const propagating_allocator&) noexcept = default;

       propagating_allocator&
       operator=(const propagating_allocator& a) noexcept
 	{
 	  static_assert(Propagate, "assigning propagating_allocator<T, true>");
 	  propagating_allocator(a).swap_base(*this);
 	  return *this;
 	}

       template<bool P2>
   	propagating_allocator&
   	operator=(const propagating_allocator<Tp, P2>& a) noexcept
   	{
 	  static_assert(P2, "assigning propagating_allocator<T, true>");
 	  propagating_allocator(a).swap_base(*this);
 	  return *this;
   	}

       // postcondition: a.get_personality() == 0
       propagating_allocator(propagating_allocator&& a) noexcept
       : base_alloc()
       { swap_base(a); }

       // postcondition: a.get_personality() == 0
       propagating_allocator&
       operator=(propagating_allocator&& a) noexcept
       {
 	propagating_allocator(std::move(a)).swap_base(*this);
 	return *this;
       }

       typedef trait_type propagate_on_container_copy_assignment;
       typedef trait_type propagate_on_container_move_assignment;
       typedef trait_type propagate_on_container_swap;

       propagating_allocator select_on_container_copy_construction() const
       { return Propagate ? *this : propagating_allocator(); }
     };

   // Class template supporting the minimal interface that satisfies the
   // Allocator requirements, from example in [allocator.requirements]
   template <class Tp>
     struct SimpleAllocator
     {
       typedef Tp value_type;

       SimpleAllocator() { }

       template <class T>
         SimpleAllocator(const SimpleAllocator<T>& other) { }

       Tp *allocate(std::size_t n)
       { return std::allocator<Tp>().allocate(n); }

       void deallocate(Tp *p, std::size_t n)
       { std::allocator<Tp>().deallocate(p, n); }
     };

   template <class T, class U>
     bool operator==(const SimpleAllocator<T>&, const SimpleAllocator<U>&)
     { return true; }
   template <class T, class U>
     bool operator!=(const SimpleAllocator<T>&, const SimpleAllocator<U>&)
     { return false; }

 #endif

   template<typename Tp>
     struct ExplicitConsAlloc : std::allocator<Tp>
     {
       ExplicitConsAlloc() { }

       template<typename Up>
         explicit
         ExplicitConsAlloc(const ExplicitConsAlloc<Up>&) { }

       template<typename Up>
         struct rebind
         { typedef ExplicitConsAlloc<Up> other; };
     };

 } // namespace __gnu_test

 #endif // _GLIBCXX_TESTSUITE_ALLOCATOR_H
	// -- C++ --
	// Testing allocator for the C++ library testsuite.
	//
	// Copyright (C) 2002-2013 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/>.
	//

	// This file provides an test instrumentation allocator that can be
	// used to verify allocation functionality of standard library
	// containers. 2002.11.25 smw

	#ifndef _GLIBCXX_TESTSUITE_ALLOCATOR_H
	#define _GLIBCXX_TESTSUITE_ALLOCATOR_H

	#include <tr1/unordered_map>
	#include <bits/move.h>
	#include <testsuite_hooks.h>

	namespace __gnu_test
	{
	class tracker_allocator_counter
	{
	public:
	typedef std::size_t size_type;

	static void*
	allocate(size_type blocksize)
	{
	void* p = ::operator new(blocksize);
	allocationCount_ += blocksize;
	return p;
	}

	static void
	construct() { constructCount_++; }

	static void
	destroy() { destructCount_++; }

	static void
	deallocate(void* p, size_type blocksize)
	{
	::operator delete(p);
	deallocationCount_ += blocksize;
	}

	static size_type
	get_allocation_count() { return allocationCount_; }

	static size_type
	get_deallocation_count() { return deallocationCount_; }

	static int
	get_construct_count() { return constructCount_; }

	static int
	get_destruct_count() { return destructCount_; }

	static void
	reset()
	{
	allocationCount_ = 0;
	deallocationCount_ = 0;
	constructCount_ = 0;
	destructCount_ = 0;
	}

	private:
	static size_type allocationCount_;
	static size_type deallocationCount_;
	static int constructCount_;
	static int destructCount_;
	};

	// A simple basic allocator that just forwards to the
	// tracker_allocator_counter to fulfill memory requests. This class
	// is templated on the target object type, but tracker isn't.
	template<class T>
	class tracker_allocator
	{
	private:
	typedef tracker_allocator_counter counter_type;

	public:
	typedef T value_type;
	typedef T* pointer;
	typedef const T* const_pointer;
	typedef T& reference;
	typedef const T& const_reference;
	typedef std::size_t size_type;
	typedef std::ptrdiff_t difference_type;

	template<class U> struct rebind { typedef tracker_allocator<U> other; };

	pointer
	address(reference value) const _GLIBCXX_NOEXCEPT
	{ return std::__addressof(value); }

	const_pointer
	address(const_reference value) const _GLIBCXX_NOEXCEPT
	{ return std::__addressof(value); }

	tracker_allocator() _GLIBCXX_USE_NOEXCEPT
	{ }

	tracker_allocator(const tracker_allocator&) _GLIBCXX_USE_NOEXCEPT
	{ }

	template<class U>
	tracker_allocator(const tracker_allocator<U>&) _GLIBCXX_USE_NOEXCEPT
	{ }

	~tracker_allocator() _GLIBCXX_USE_NOEXCEPT
	{ }

	size_type
	max_size() const _GLIBCXX_USE_NOEXCEPT
	{ return size_type(-1) / sizeof(T); }

	pointer
	allocate(size_type n, const void* = 0)
	{ return static_cast<pointer>(counter_type::allocate(n * sizeof(T))); }

	#if __cplusplus >= 201103L
	template<typename U, typename... Args>
	void
	construct(U* p, Args&&... args)
	{
	::new((void *)p) U(std::forward<Args>(args)...);
	counter_type::construct();
	}

	template<typename U>
	void
	destroy(U* p)
	{
	p->~U();
	counter_type::destroy();
	}
	#else
	void
	construct(pointer p, const T& value)
	{
	::new ((void *)p) T(value);
	counter_type::construct();
	}

	void
	destroy(pointer p)
	{
	p->~T();
	counter_type::destroy();
	}
	#endif

	void
	deallocate(pointer p, size_type num)
	{ counter_type::deallocate(p, num * sizeof(T)); }
	};

	template<class T1, class T2>
	bool
	operator==(const tracker_allocator<T1>&,
	const tracker_allocator<T2>&) throw()
	{ return true; }

	template<class T1, class T2>
	bool
	operator!=(const tracker_allocator<T1>&,
	const tracker_allocator<T2>&) throw()
	{ return false; }

	bool
	check_construct_destroy(const char* tag, int expected_c, int expected_d);

	template<typename Alloc>
	bool
	check_deallocate_null()
	{
	// Let's not core here...
	Alloc a;
	a.deallocate(0, 1);
	a.deallocate(0, 10);
	return true;
	}

	template<typename Alloc>
	bool
	check_allocate_max_size()
	{
	Alloc a;
	try
	{
	a.allocate(a.max_size() + 1);
	}
	catch(std::bad_alloc&)
	{
	return true;
	}
	catch(...)
	{
	throw;
	}
	throw;
	}


	// A simple allocator which can be constructed endowed of a given
	// "personality" (an integer), queried in operator== to simulate the
	// behavior of realworld "unequal" allocators (i.e., not exploiting
	// the provision in 20.1.5/4, first bullet). A global unordered_map,
	// filled at allocation time with (pointer, personality) pairs, is
	// then consulted to enforce the requirements in Table 32 about
	// deallocation vs allocator equality. Note that this allocator is
	// swappable, not assignable, consistently with Option 3 of DR 431
	// (see N1599).
	struct uneq_allocator_base
	{
	typedef std::tr1::unordered_map<void*, int> map_type;

	// Avoid static initialization troubles and/or bad interactions
	// with tests linking testsuite_allocator.o and playing globally
	// with operator new/delete.
	static map_type&
	get_map()
	{
	static map_type alloc_map;
	return alloc_map;
	}
	};

	template<typename Tp>
	class uneq_allocator
	: private uneq_allocator_base
	{
	public:
	typedef std::size_t size_type;
	typedef std::ptrdiff_t difference_type;
	typedef Tp* pointer;
	typedef const Tp* const_pointer;
	typedef Tp& reference;
	typedef const Tp& const_reference;
	typedef Tp value_type;

	#if __cplusplus >= 201103L
	typedef std::true_type propagate_on_container_swap;
	#endif

	template<typename Tp1>
	struct rebind
	{ typedef uneq_allocator<Tp1> other; };

	uneq_allocator() _GLIBCXX_USE_NOEXCEPT
	: personality(0) { }

	uneq_allocator(int person) _GLIBCXX_USE_NOEXCEPT
	: personality(person) { }

	template<typename Tp1>
	uneq_allocator(const uneq_allocator<Tp1>& b) _GLIBCXX_USE_NOEXCEPT
	: personality(b.get_personality()) { }

	~uneq_allocator() _GLIBCXX_USE_NOEXCEPT
	{ }

	int get_personality() const { return personality; }

	pointer
	address(reference x) const _GLIBCXX_NOEXCEPT
	{ return std::__addressof(x); }

	const_pointer
	address(const_reference x) const _GLIBCXX_NOEXCEPT
	{ return std::__addressof(x); }

	pointer
	allocate(size_type n, const void* = 0)
	{
	if (__builtin_expect(n > this->max_size(), false))
	std::__throw_bad_alloc();

	pointer p = static_cast<Tp>(::operator new(n sizeof(Tp)));
	try
	{
	get_map().insert(map_type::value_type(reinterpret_cast<void*>(p),
	personality));
	}
	catch(...)
	{
	::operator delete(p);
	__throw_exception_again;
	}
	return p;
	}

	void
	deallocate(pointer p, size_type)
	{
	bool test __attribute__((unused)) = true;

	VERIFY( p );

	map_type::iterator it = get_map().find(reinterpret_cast<void*>(p));
	VERIFY( it != get_map().end() );

	// Enforce requirements in Table 32 about deallocation vs
	// allocator equality.
	VERIFY( it->second == personality );

	get_map().erase(it);
	::operator delete(p);
	}

	size_type
	max_size() const _GLIBCXX_USE_NOEXCEPT
	{ return size_type(-1) / sizeof(Tp); }

	#if __cplusplus >= 201103L
	template<typename U, typename... Args>
	void
	construct(U* p, Args&&... args)
	{ ::new((void *)p) U(std::forward<Args>(args)...); }

	template<typename U>
	void
	destroy(U* p) { p->~U(); }

	// Not copy assignable...
	uneq_allocator&
	operator=(const uneq_allocator&) = delete;
	#else
	void
	construct(pointer p, const Tp& val)
	{ ::new((void *)p) Tp(val); }

	void
	destroy(pointer p) { p->~Tp(); }

	private:
	// Not assignable...
	uneq_allocator&
	operator=(const uneq_allocator&);
	#endif

	private:

	// ... yet swappable!
	friend inline void
	swap(uneq_allocator& a, uneq_allocator& b)
	{ std::swap(a.personality, b.personality); }

	template<typename Tp1>
	friend inline bool
	operator==(const uneq_allocator& a, const uneq_allocator<Tp1>& b)
	{ return a.personality == b.personality; }

	template<typename Tp1>
	friend inline bool
	operator!=(const uneq_allocator& a, const uneq_allocator<Tp1>& b)
	{ return !(a == b); }

	int personality;
	};

	#if __cplusplus >= 201103L
	// An uneq_allocator which can be used to test allocator propagation.
	template<typename Tp, bool Propagate>
	class propagating_allocator : public uneq_allocator<Tp>
	{
	typedef uneq_allocator<Tp> base_alloc;
	base_alloc& base() { return *this; }
	const base_alloc& base() const { return *this; }
	void swap_base(base_alloc& b) { swap(b, this->base()); }

	typedef std::integral_constant<bool, Propagate> trait_type;

	public:
	// default allocator_traits::rebind_alloc would select
	// uneq_allocator::rebind so we must define rebind here
	template<typename Up>
	struct rebind { typedef propagating_allocator<Up, Propagate> other; };

	propagating_allocator(int i) noexcept
	: base_alloc(i)
	{ }

	template<typename Up>
	propagating_allocator(const propagating_allocator<Up, Propagate>& a)
	noexcept
	: base_alloc(a)
	{ }

	propagating_allocator() noexcept = default;

	propagating_allocator(const propagating_allocator&) noexcept = default;

	propagating_allocator&
	operator=(const propagating_allocator& a) noexcept
	{
	static_assert(Propagate, "assigning propagating_allocator<T, true>");
	propagating_allocator(a).swap_base(*this);
	return *this;
	}

	template<bool P2>
	propagating_allocator&
	operator=(const propagating_allocator<Tp, P2>& a) noexcept
	{
	static_assert(P2, "assigning propagating_allocator<T, true>");
	propagating_allocator(a).swap_base(*this);
	return *this;
	}

	// postcondition: a.get_personality() == 0
	propagating_allocator(propagating_allocator&& a) noexcept
	: base_alloc()
	{ swap_base(a); }

	// postcondition: a.get_personality() == 0
	propagating_allocator&
	operator=(propagating_allocator&& a) noexcept
	{
	propagating_allocator(std::move(a)).swap_base(*this);
	return *this;
	}

	typedef trait_type propagate_on_container_copy_assignment;
	typedef trait_type propagate_on_container_move_assignment;
	typedef trait_type propagate_on_container_swap;

	propagating_allocator select_on_container_copy_construction() const
	{ return Propagate ? *this : propagating_allocator(); }
	};

	// Class template supporting the minimal interface that satisfies the
	// Allocator requirements, from example in [allocator.requirements]
	template <class Tp>
	struct SimpleAllocator
	{
	typedef Tp value_type;

	SimpleAllocator() { }

	template <class T>
	SimpleAllocator(const SimpleAllocator<T>& other) { }

	Tp *allocate(std::size_t n)
	{ return std::allocator<Tp>().allocate(n); }

	void deallocate(Tp *p, std::size_t n)
	{ std::allocator<Tp>().deallocate(p, n); }
	};

	template <class T, class U>
	bool operator==(const SimpleAllocator<T>&, const SimpleAllocator<U>&)
	{ return true; }
	template <class T, class U>
	bool operator!=(const SimpleAllocator<T>&, const SimpleAllocator<U>&)
	{ return false; }

	#endif

	template<typename Tp>
	struct ExplicitConsAlloc : std::allocator<Tp>
	{
	ExplicitConsAlloc() { }

	template<typename Up>
	explicit
	ExplicitConsAlloc(const ExplicitConsAlloc<Up>&) { }

	template<typename Up>
	struct rebind
	{ typedef ExplicitConsAlloc<Up> other; };
	};

	} // namespace __gnu_test

	#endif // _GLIBCXX_TESTSUITE_ALLOCATOR_H