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shared_ptr_base.h: Use noexcept.

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2011-05-18  Jonathan Wakely  <jwakely.gcc@gmail.com>

	* include/bits/shared_ptr_base.h: Use noexcept. Define special member
	functions as defaulted/deleted.
	* include/bits/shared_ptr.h: Use noexcept.
	* 20_util/shared_ptr/cons/43820_neg.cc: Adjust dg-error line numbers.
	* 20_util/weak_ptr/comparison/cmp_neg.cc: Likewise.

From-SVN: r173882
This commit is contained in:
Jonathan Wakely 2011-05-18 22:59:17 +00:00 committed by Jonathan Wakely
parent 31f9eb59e5
commit cf70f97b95
5 changed files with 141 additions and 127 deletions
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8
libstdc++-v3/ChangeLog
View File

@ -1,3 +1,11 @@
2011-05-18 Jonathan Wakely <jwakely.gcc@gmail.com>
* include/bits/shared_ptr_base.h: Use noexcept. Define special member
functions as defaulted/deleted.
* include/bits/shared_ptr.h: Use noexcept.
* 20_util/shared_ptr/cons/43820_neg.cc: Adjust dg-error line numbers.
* 20_util/weak_ptr/comparison/cmp_neg.cc: Likewise.
2011-05-18 Jonathan Wakely <jwakely.gcc@gmail.com>
* doc/xml/manual/bitmap_allocator.xml: Fix typos.

52
libstdc++-v3/include/bits/shared_ptr.h
View File

@ -73,7 +73,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
/// 2.2.3.10 shared_ptr get_deleter (experimental)
template<typename _Del, typename _Tp, _Lock_policy _Lp>
inline _Del*
get_deleter(const __shared_ptr<_Tp, _Lp>& __p)
get_deleter(const __shared_ptr<_Tp, _Lp>& __p) noexcept
{
#ifdef __GXX_RTTI
return static_cast<_Del*>(__p._M_get_deleter(typeid(_Del)));
@ -97,7 +97,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
* @brief Construct an empty %shared_ptr.
* @post use_count()==0 && get()==0
*/
constexpr shared_ptr()
constexpr shared_ptr() noexcept
: __shared_ptr<_Tp>() { }
/**
@ -201,7 +201,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
* @endcode
*/
template<typename _Tp1>
shared_ptr(const shared_ptr<_Tp1>& __r, _Tp* __p)
shared_ptr(const shared_ptr<_Tp1>& __r, _Tp* __p) noexcept
: __shared_ptr<_Tp>(__r, __p) { }
/**
@ -213,7 +213,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
*/
template<typename _Tp1, typename = typename
std::enable_if<std::is_convertible<_Tp1*, _Tp*>::value>::type>
shared_ptr(const shared_ptr<_Tp1>& __r)
shared_ptr(const shared_ptr<_Tp1>& __r) noexcept
: __shared_ptr<_Tp>(__r) { }
/**
@ -221,7 +221,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
* @param __r A %shared_ptr rvalue.
* @post *this contains the old value of @a __r, @a __r is empty.
*/
shared_ptr(shared_ptr&& __r)
shared_ptr(shared_ptr&& __r) noexcept
: __shared_ptr<_Tp>(std::move(__r)) { }
/**
@ -231,7 +231,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
*/
template<typename _Tp1, typename = typename
std::enable_if<std::is_convertible<_Tp1*, _Tp*>::value>::type>
shared_ptr(shared_ptr<_Tp1>&& __r)
shared_ptr(shared_ptr<_Tp1>&& __r) noexcept
: __shared_ptr<_Tp>(std::move(__r)) { }
/**
@ -261,12 +261,12 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
* @param __p A null pointer constant.
* @post use_count() == 0 && get() == nullptr
*/
constexpr shared_ptr(nullptr_t __p)
constexpr shared_ptr(nullptr_t __p) noexcept
: __shared_ptr<_Tp>(__p) { }
template<typename _Tp1>
shared_ptr&
operator=(const shared_ptr<_Tp1>& __r) // never throws
operator=(const shared_ptr<_Tp1>& __r) noexcept
{
this->__shared_ptr<_Tp>::operator=(__r);
return *this;
@ -283,7 +283,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
#endif
shared_ptr&
operator=(shared_ptr&& __r)
operator=(shared_ptr&& __r) noexcept
{
this->__shared_ptr<_Tp>::operator=(std::move(__r));
return *this;
@ -291,7 +291,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
template<class _Tp1>
shared_ptr&
operator=(shared_ptr<_Tp1>&& __r)
operator=(shared_ptr<_Tp1>&& __r) noexcept
{
this->__shared_ptr<_Tp>::operator=(std::move(__r));
return *this;
@ -425,23 +425,23 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
// 20.8.13.2.9 shared_ptr specialized algorithms.
template<typename _Tp>
inline void
swap(shared_ptr<_Tp>& __a, shared_ptr<_Tp>& __b)
swap(shared_ptr<_Tp>& __a, shared_ptr<_Tp>& __b) noexcept
{ __a.swap(__b); }
// 20.8.13.2.10 shared_ptr casts.
template<typename _Tp, typename _Tp1>
inline shared_ptr<_Tp>
static_pointer_cast(const shared_ptr<_Tp1>& __r)
static_pointer_cast(const shared_ptr<_Tp1>& __r) noexcept
{ return shared_ptr<_Tp>(__r, static_cast<_Tp*>(__r.get())); }
template<typename _Tp, typename _Tp1>
inline shared_ptr<_Tp>
const_pointer_cast(const shared_ptr<_Tp1>& __r)
const_pointer_cast(const shared_ptr<_Tp1>& __r) noexcept
{ return shared_ptr<_Tp>(__r, const_cast<_Tp*>(__r.get())); }
template<typename _Tp, typename _Tp1>
inline shared_ptr<_Tp>
dynamic_pointer_cast(const shared_ptr<_Tp1>& __r)
dynamic_pointer_cast(const shared_ptr<_Tp1>& __r) noexcept
{
if (_Tp* __p = dynamic_cast<_Tp*>(__r.get()))
return shared_ptr<_Tp>(__r, __p);
@ -458,22 +458,22 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
class weak_ptr : public __weak_ptr<_Tp>
{
public:
constexpr weak_ptr()
constexpr weak_ptr() noexcept
: __weak_ptr<_Tp>() { }
template<typename _Tp1, typename = typename
std::enable_if<std::is_convertible<_Tp1*, _Tp*>::value>::type>
weak_ptr(const weak_ptr<_Tp1>& __r)
weak_ptr(const weak_ptr<_Tp1>& __r) noexcept
: __weak_ptr<_Tp>(__r) { }
template<typename _Tp1, typename = typename
std::enable_if<std::is_convertible<_Tp1*, _Tp*>::value>::type>
weak_ptr(const shared_ptr<_Tp1>& __r)
weak_ptr(const shared_ptr<_Tp1>& __r) noexcept
: __weak_ptr<_Tp>(__r) { }
template<typename _Tp1>
weak_ptr&
operator=(const weak_ptr<_Tp1>& __r) // never throws
operator=(const weak_ptr<_Tp1>& __r) noexcept
{
this->__weak_ptr<_Tp>::operator=(__r);
return *this;
@ -481,14 +481,14 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
template<typename _Tp1>
weak_ptr&
operator=(const shared_ptr<_Tp1>& __r) // never throws
operator=(const shared_ptr<_Tp1>& __r) noexcept
{
this->__weak_ptr<_Tp>::operator=(__r);
return *this;
}
shared_ptr<_Tp>
lock() const // never throws
lock() const noexcept
{
#ifdef __GTHREADS
if (this->expired())
@ -511,7 +511,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
// 20.8.13.3.7 weak_ptr specialized algorithms.
template<typename _Tp>
inline void
swap(weak_ptr<_Tp>& __a, weak_ptr<_Tp>& __b)
swap(weak_ptr<_Tp>& __a, weak_ptr<_Tp>& __b) noexcept
{ __a.swap(__b); }
@ -538,12 +538,12 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
class enable_shared_from_this
{
protected:
constexpr enable_shared_from_this() { }
constexpr enable_shared_from_this() noexcept { }
enable_shared_from_this(const enable_shared_from_this&) { }
enable_shared_from_this(const enable_shared_from_this&) noexcept { }
enable_shared_from_this&
operator=(const enable_shared_from_this&)
operator=(const enable_shared_from_this&) noexcept
{ return *this; }
~enable_shared_from_this() { }
@ -560,14 +560,14 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
private:
template<typename _Tp1>
void
_M_weak_assign(_Tp1* __p, const __shared_count<>& __n) const
_M_weak_assign(_Tp1* __p, const __shared_count<>& __n) const noexcept
{ _M_weak_this._M_assign(__p, __n); }
template<typename _Tp1>
friend void
__enable_shared_from_this_helper(const __shared_count<>& __pn,
const enable_shared_from_this* __pe,
const _Tp1* __px)
const _Tp1* __px) noexcept
{
if (__pe != 0)
__pe->_M_weak_assign(const_cast<_Tp1*>(__px), __pn);

198
libstdc++-v3/include/bits/shared_ptr_base.h
View File

@ -61,7 +61,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
{
public:
virtual char const*
what() const throw();
what() const noexcept;
virtual ~bad_weak_ptr() throw();
};
@ -108,21 +108,21 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
: public _Mutex_base<_Lp>
{
public:
_Sp_counted_base()
_Sp_counted_base() noexcept
: _M_use_count(1), _M_weak_count(1) { }
virtual
~_Sp_counted_base() // nothrow
~_Sp_counted_base() noexcept
{ }
// Called when _M_use_count drops to zero, to release the resources
// managed by *this.
virtual void
_M_dispose() = 0; // nothrow
_M_dispose() noexcept = 0;
// Called when _M_weak_count drops to zero.
virtual void
_M_destroy() // nothrow
_M_destroy() noexcept
{ delete this; }
virtual void*
@ -136,7 +136,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
_M_add_ref_lock();
void
_M_release() // nothrow
_M_release() noexcept
{
// Be race-detector-friendly. For more info see bits/c++config.
_GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(&_M_use_count);
@ -166,11 +166,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
}
void
_M_weak_add_ref() // nothrow
_M_weak_add_ref() noexcept
{ __gnu_cxx::__atomic_add_dispatch(&_M_weak_count, 1); }
void
_M_weak_release() // nothrow
_M_weak_release() noexcept
{
// Be race-detector-friendly. For more info see bits/c++config.
_GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(&_M_weak_count);
@ -189,7 +189,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
}
long
_M_get_use_count() const // nothrow
_M_get_use_count() const noexcept
{
// No memory barrier is used here so there is no synchronization
// with other threads.
@ -197,8 +197,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
}
private:
_Sp_counted_base(_Sp_counted_base const&);
_Sp_counted_base& operator=(_Sp_counted_base const&);
_Sp_counted_base(_Sp_counted_base const&) = delete;
_Sp_counted_base& operator=(_Sp_counted_base const&) = delete;
_Atomic_word _M_use_count; // #shared
_Atomic_word _M_weak_count; // #weak + (#shared != 0)
@ -289,11 +289,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
: _M_ptr(__p) { }
virtual void
_M_dispose() // nothrow
_M_dispose() noexcept
{ delete _M_ptr; }
virtual void
_M_destroy() // nothrow
_M_destroy() noexcept
{ delete this; }
virtual void*
@ -309,15 +309,15 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
template<>
inline void
_Sp_counted_ptr<nullptr_t, _S_single>::_M_dispose() { }
_Sp_counted_ptr<nullptr_t, _S_single>::_M_dispose() noexcept { }
template<>
inline void
_Sp_counted_ptr<nullptr_t, _S_mutex>::_M_dispose() { }
_Sp_counted_ptr<nullptr_t, _S_mutex>::_M_dispose() noexcept { }
template<>
inline void
_Sp_counted_ptr<nullptr_t, _S_atomic>::_M_dispose() { }
_Sp_counted_ptr<nullptr_t, _S_atomic>::_M_dispose() noexcept { }
// Support for custom deleter and/or allocator
template<typename _Ptr, typename _Deleter, typename _Alloc, _Lock_policy _Lp>
@ -347,11 +347,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
: _M_ptr(__p), _M_del(__d, __a) { }
virtual void
_M_dispose() // nothrow
_M_dispose() noexcept
{ _M_del._M_del(_M_ptr); }
virtual void
_M_destroy() // nothrow
_M_destroy() noexcept
{
_My_alloc_type __a(_M_del);
this->~_Sp_counted_deleter();
@ -413,7 +413,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
// Override because the allocator needs to know the dynamic type
virtual void
_M_destroy() // nothrow
_M_destroy() noexcept
{
typedef typename _Alloc::template
rebind<_Sp_counted_ptr_inplace>::other _My_alloc_type;
@ -424,7 +424,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
// Sneaky trick so __shared_ptr can get the managed pointer
virtual void*
_M_get_deleter(const std::type_info& __ti)
_M_get_deleter(const std::type_info& __ti) noexcept
{
#ifdef __GXX_RTTI
return __ti == typeid(_Sp_make_shared_tag)
@ -444,7 +444,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
class __shared_count
{
public:
constexpr __shared_count() : _M_pi(0) // nothrow
constexpr __shared_count() noexcept : _M_pi(0)
{ }
template<typename _Ptr>
@ -545,21 +545,21 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
// Throw bad_weak_ptr when __r._M_get_use_count() == 0.
explicit __shared_count(const __weak_count<_Lp>& __r);
~__shared_count() // nothrow
~__shared_count() noexcept
{
if (_M_pi != 0)
_M_pi->_M_release();
}
__shared_count(const __shared_count& __r)
: _M_pi(__r._M_pi) // nothrow
__shared_count(const __shared_count& __r) noexcept
: _M_pi(__r._M_pi)
{
if (_M_pi != 0)
_M_pi->_M_add_ref_copy();
}
__shared_count&
operator=(const __shared_count& __r) // nothrow
operator=(const __shared_count& __r) noexcept
{
_Sp_counted_base<_Lp>* __tmp = __r._M_pi;
if (__tmp != _M_pi)
@ -574,7 +574,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
}
void
_M_swap(__shared_count& __r) // nothrow
_M_swap(__shared_count& __r) noexcept
{
_Sp_counted_base<_Lp>* __tmp = __r._M_pi;
__r._M_pi = _M_pi;
@ -582,28 +582,28 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
}
long
_M_get_use_count() const // nothrow
_M_get_use_count() const noexcept
{ return _M_pi != 0 ? _M_pi->_M_get_use_count() : 0; }
bool
_M_unique() const // nothrow
_M_unique() const noexcept
{ return this->_M_get_use_count() == 1; }
void*
_M_get_deleter(const std::type_info& __ti) const
_M_get_deleter(const std::type_info& __ti) const noexcept
{ return _M_pi ? _M_pi->_M_get_deleter(__ti) : 0; }
bool
_M_less(const __shared_count& __rhs) const
_M_less(const __shared_count& __rhs) const noexcept
{ return std::less<_Sp_counted_base<_Lp>*>()(this->_M_pi, __rhs._M_pi); }
bool
_M_less(const __weak_count<_Lp>& __rhs) const
_M_less(const __weak_count<_Lp>& __rhs) const noexcept
{ return std::less<_Sp_counted_base<_Lp>*>()(this->_M_pi, __rhs._M_pi); }
// Friend function injected into enclosing namespace and found by ADL
friend inline bool
operator==(const __shared_count& __a, const __shared_count& __b)
operator==(const __shared_count& __a, const __shared_count& __b) noexcept
{ return __a._M_pi == __b._M_pi; }
private:
@ -637,29 +637,31 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
class __weak_count
{
public:
constexpr __weak_count() : _M_pi(0) // nothrow
constexpr __weak_count() noexcept : _M_pi(0)
{ }
__weak_count(const __shared_count<_Lp>& __r) : _M_pi(__r._M_pi) // nothrow
__weak_count(const __shared_count<_Lp>& __r) noexcept
: _M_pi(__r._M_pi)
{
if (_M_pi != 0)
_M_pi->_M_weak_add_ref();
}
__weak_count(const __weak_count<_Lp>& __r) : _M_pi(__r._M_pi) // nothrow
__weak_count(const __weak_count<_Lp>& __r) noexcept
: _M_pi(__r._M_pi)
{
if (_M_pi != 0)
_M_pi->_M_weak_add_ref();
}
~__weak_count() // nothrow
~__weak_count() noexcept
{
if (_M_pi != 0)
_M_pi->_M_weak_release();
}
__weak_count<_Lp>&
operator=(const __shared_count<_Lp>& __r) // nothrow
operator=(const __shared_count<_Lp>& __r) noexcept
{
_Sp_counted_base<_Lp>* __tmp = __r._M_pi;
if (__tmp != 0)
@ -671,7 +673,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
}
__weak_count<_Lp>&
operator=(const __weak_count<_Lp>& __r) // nothrow
operator=(const __weak_count<_Lp>& __r) noexcept
{
_Sp_counted_base<_Lp>* __tmp = __r._M_pi;
if (__tmp != 0)
@ -683,7 +685,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
}
void
_M_swap(__weak_count<_Lp>& __r) // nothrow
_M_swap(__weak_count<_Lp>& __r) noexcept
{
_Sp_counted_base<_Lp>* __tmp = __r._M_pi;
__r._M_pi = _M_pi;
@ -691,20 +693,20 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
}
long
_M_get_use_count() const // nothrow
_M_get_use_count() const noexcept
{ return _M_pi != 0 ? _M_pi->_M_get_use_count() : 0; }
bool
_M_less(const __weak_count& __rhs) const
_M_less(const __weak_count& __rhs) const noexcept
{ return std::less<_Sp_counted_base<_Lp>*>()(this->_M_pi, __rhs._M_pi); }
bool
_M_less(const __shared_count<_Lp>& __rhs) const
_M_less(const __shared_count<_Lp>& __rhs) const noexcept
{ return std::less<_Sp_counted_base<_Lp>*>()(this->_M_pi, __rhs._M_pi); }
// Friend function injected into enclosing namespace and found by ADL
friend inline bool
operator==(const __weak_count& __a, const __weak_count& __b)
operator==(const __weak_count& __a, const __weak_count& __b) noexcept
{ return __a._M_pi == __b._M_pi; }
private:
@ -732,18 +734,18 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
void
__enable_shared_from_this_helper(const __shared_count<_Lp>&,
const __enable_shared_from_this<_Tp1,
_Lp>*, const _Tp2*);
_Lp>*, const _Tp2*) noexcept;
// Friend of enable_shared_from_this.
template<typename _Tp1, typename _Tp2>
void
__enable_shared_from_this_helper(const __shared_count<>&,
const enable_shared_from_this<_Tp1>*,
const _Tp2*);
const _Tp2*) noexcept;
template<_Lock_policy _Lp>
inline void
__enable_shared_from_this_helper(const __shared_count<_Lp>&, ...)
__enable_shared_from_this_helper(const __shared_count<_Lp>&, ...) noexcept
{ }
@ -753,8 +755,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
public:
typedef _Tp element_type;
constexpr __shared_ptr()
: _M_ptr(0), _M_refcount() // never throws
constexpr __shared_ptr() noexcept
: _M_ptr(0), _M_refcount()
{ }
template<typename _Tp1>
@ -795,20 +797,22 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
{ }
template<typename _Tp1>
__shared_ptr(const __shared_ptr<_Tp1, _Lp>& __r, _Tp* __p)
__shared_ptr(const __shared_ptr<_Tp1, _Lp>& __r, _Tp* __p) noexcept
: _M_ptr(__p), _M_refcount(__r._M_refcount) // never throws
{ }
// generated copy constructor, assignment, destructor are fine.
__shared_ptr(const __shared_ptr&) noexcept = default;
__shared_ptr& operator=(const __shared_ptr&) noexcept = default;
~__shared_ptr() = default;
template<typename _Tp1, typename = typename
std::enable_if<std::is_convertible<_Tp1*, _Tp*>::value>::type>
__shared_ptr(const __shared_ptr<_Tp1, _Lp>& __r)
: _M_ptr(__r._M_ptr), _M_refcount(__r._M_refcount) // never throws
__shared_ptr(const __shared_ptr<_Tp1, _Lp>& __r) noexcept
: _M_ptr(__r._M_ptr), _M_refcount(__r._M_refcount)
{ }
__shared_ptr(__shared_ptr&& __r)
: _M_ptr(__r._M_ptr), _M_refcount() // never throws
__shared_ptr(__shared_ptr&& __r) noexcept
: _M_ptr(__r._M_ptr), _M_refcount()
{
_M_refcount._M_swap(__r._M_refcount);
__r._M_ptr = 0;
@ -816,8 +820,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
template<typename _Tp1, typename = typename
std::enable_if<std::is_convertible<_Tp1*, _Tp*>::value>::type>
__shared_ptr(__shared_ptr<_Tp1, _Lp>&& __r)
: _M_ptr(__r._M_ptr), _M_refcount() // never throws
__shared_ptr(__shared_ptr<_Tp1, _Lp>&& __r) noexcept
: _M_ptr(__r._M_ptr), _M_refcount()
{
_M_refcount._M_swap(__r._M_refcount);
__r._M_ptr = 0;
@ -860,13 +864,13 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
#endif
/* TODO: use delegating constructor */
constexpr __shared_ptr(nullptr_t)
: _M_ptr(0), _M_refcount() // never throws
constexpr __shared_ptr(nullptr_t) noexcept
: _M_ptr(0), _M_refcount()
{ }
template<typename _Tp1>
__shared_ptr&
operator=(const __shared_ptr<_Tp1, _Lp>& __r) // never throws
operator=(const __shared_ptr<_Tp1, _Lp>& __r) noexcept
{
_M_ptr = __r._M_ptr;
_M_refcount = __r._M_refcount; // __shared_count::op= doesn't throw
@ -884,7 +888,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
#endif
__shared_ptr&
operator=(__shared_ptr&& __r)
operator=(__shared_ptr&& __r) noexcept
{
__shared_ptr(std::move(__r)).swap(*this);
return *this;
@ -892,7 +896,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
template<class _Tp1>
__shared_ptr&
operator=(__shared_ptr<_Tp1, _Lp>&& __r)
operator=(__shared_ptr<_Tp1, _Lp>&& __r) noexcept
{
__shared_ptr(std::move(__r)).swap(*this);
return *this;
@ -907,7 +911,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
}
void
reset() // never throws
reset() noexcept
{ __shared_ptr().swap(*this); }
template<typename _Tp1>
@ -931,36 +935,36 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
// Allow class instantiation when _Tp is [cv-qual] void.
typename std::add_lvalue_reference<_Tp>::type
operator*() const // never throws
operator*() const noexcept
{
_GLIBCXX_DEBUG_ASSERT(_M_ptr != 0);
return *_M_ptr;
}
_Tp*
operator->() const // never throws
operator->() const noexcept
{
_GLIBCXX_DEBUG_ASSERT(_M_ptr != 0);
return _M_ptr;
}
_Tp*
get() const // never throws
get() const noexcept
{ return _M_ptr; }
explicit operator bool() const // never throws
{ return _M_ptr == 0 ? false : true; }
bool
unique() const // never throws
unique() const noexcept
{ return _M_refcount._M_unique(); }
long
use_count() const // never throws
use_count() const noexcept
{ return _M_refcount._M_get_use_count(); }
void
swap(__shared_ptr<_Tp, _Lp>& __other) // never throws
swap(__shared_ptr<_Tp, _Lp>& __other) noexcept
{
std::swap(_M_ptr, __other._M_ptr);
_M_refcount._M_swap(__other._M_refcount);
@ -1033,14 +1037,14 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
private:
void*
_M_get_deleter(const std::type_info& __ti) const
_M_get_deleter(const std::type_info& __ti) const noexcept
{ return _M_refcount._M_get_deleter(__ti); }
template<typename _Tp1, _Lock_policy _Lp1> friend class __shared_ptr;
template<typename _Tp1, _Lock_policy _Lp1> friend class __weak_ptr;
template<typename _Del, typename _Tp1, _Lock_policy _Lp1>
friend _Del* get_deleter(const __shared_ptr<_Tp1, _Lp1>&);
friend _Del* get_deleter(const __shared_ptr<_Tp1, _Lp1>&) noexcept;
_Tp* _M_ptr; // Contained pointer.
__shared_count<_Lp> _M_refcount; // Reference counter.
@ -1151,7 +1155,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
struct _Sp_less : public binary_function<_Sp, _Sp, bool>
{
bool
operator()(const _Sp& __lhs, const _Sp& __rhs) const
operator()(const _Sp& __lhs, const _Sp& __rhs) const noexcept
{
typedef typename _Sp::element_type element_type;
return std::less<element_type*>()(__lhs.get(), __rhs.get());
@ -1166,7 +1170,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
// 2.2.3.8 shared_ptr specialized algorithms.
template<typename _Tp, _Lock_policy _Lp>
inline void
swap(__shared_ptr<_Tp, _Lp>& __a, __shared_ptr<_Tp, _Lp>& __b)
swap(__shared_ptr<_Tp, _Lp>& __a, __shared_ptr<_Tp, _Lp>& __b) noexcept
{ __a.swap(__b); }
// 2.2.3.9 shared_ptr casts
@ -1178,7 +1182,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
/// static_pointer_cast
template<typename _Tp, typename _Tp1, _Lock_policy _Lp>
inline __shared_ptr<_Tp, _Lp>
static_pointer_cast(const __shared_ptr<_Tp1, _Lp>& __r)
static_pointer_cast(const __shared_ptr<_Tp1, _Lp>& __r) noexcept
{ return __shared_ptr<_Tp, _Lp>(__r, static_cast<_Tp*>(__r.get())); }
// The seemingly equivalent code:
@ -1188,7 +1192,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
/// const_pointer_cast
template<typename _Tp, typename _Tp1, _Lock_policy _Lp>
inline __shared_ptr<_Tp, _Lp>
const_pointer_cast(const __shared_ptr<_Tp1, _Lp>& __r)
const_pointer_cast(const __shared_ptr<_Tp1, _Lp>& __r) noexcept
{ return __shared_ptr<_Tp, _Lp>(__r, const_cast<_Tp*>(__r.get())); }
// The seemingly equivalent code:
@ -1198,7 +1202,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
/// dynamic_pointer_cast
template<typename _Tp, typename _Tp1, _Lock_policy _Lp>
inline __shared_ptr<_Tp, _Lp>
dynamic_pointer_cast(const __shared_ptr<_Tp1, _Lp>& __r)
dynamic_pointer_cast(const __shared_ptr<_Tp1, _Lp>& __r) noexcept
{
if (_Tp* __p = dynamic_cast<_Tp*>(__r.get()))
return __shared_ptr<_Tp, _Lp>(__r, __p);
@ -1212,11 +1216,13 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
public:
typedef _Tp element_type;
constexpr __weak_ptr()
: _M_ptr(0), _M_refcount() // never throws
constexpr __weak_ptr() noexcept
: _M_ptr(0), _M_refcount()
{ }
// Generated copy constructor, assignment, destructor are fine.
__weak_ptr(const __weak_ptr&) noexcept = default;
__weak_ptr& operator=(const __weak_ptr&) noexcept = default;
~__weak_ptr() = default;
// The "obvious" converting constructor implementation:
//
@ -1234,19 +1240,19 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
// in multithreaded programs __r._M_ptr may be invalidated at any point.
template<typename _Tp1, typename = typename
std::enable_if<std::is_convertible<_Tp1*, _Tp*>::value>::type>
__weak_ptr(const __weak_ptr<_Tp1, _Lp>& __r)
: _M_refcount(__r._M_refcount) // never throws
__weak_ptr(const __weak_ptr<_Tp1, _Lp>& __r) noexcept
: _M_refcount(__r._M_refcount)
{ _M_ptr = __r.lock().get(); }
template<typename _Tp1, typename = typename
std::enable_if<std::is_convertible<_Tp1*, _Tp*>::value>::type>
__weak_ptr(const __shared_ptr<_Tp1, _Lp>& __r)
: _M_ptr(__r._M_ptr), _M_refcount(__r._M_refcount) // never throws
__weak_ptr(const __shared_ptr<_Tp1, _Lp>& __r) noexcept
: _M_ptr(__r._M_ptr), _M_refcount(__r._M_refcount)
{ }
template<typename _Tp1>
__weak_ptr&
operator=(const __weak_ptr<_Tp1, _Lp>& __r) // never throws
operator=(const __weak_ptr<_Tp1, _Lp>& __r) noexcept
{
_M_ptr = __r.lock().get();
_M_refcount = __r._M_refcount;
@ -1255,7 +1261,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
template<typename _Tp1>
__weak_ptr&
operator=(const __shared_ptr<_Tp1, _Lp>& __r) // never throws
operator=(const __shared_ptr<_Tp1, _Lp>& __r) noexcept
{
_M_ptr = __r._M_ptr;
_M_refcount = __r._M_refcount;
@ -1263,7 +1269,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
}
__shared_ptr<_Tp, _Lp>
lock() const // never throws
lock() const noexcept
{
#ifdef __GTHREADS
// Optimization: avoid throw overhead.
@ -1291,11 +1297,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
} // XXX MT
long
use_count() const // never throws
use_count() const noexcept
{ return _M_refcount._M_get_use_count(); }
bool
expired() const // never throws
expired() const noexcept
{ return _M_refcount._M_get_use_count() == 0; }
template<typename _Tp1>
@ -1309,11 +1315,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
{ return _M_refcount._M_less(__rhs._M_refcount); }
void
reset() // never throws
reset() noexcept
{ __weak_ptr().swap(*this); }
void
swap(__weak_ptr& __s) // never throws
swap(__weak_ptr& __s) noexcept
{
std::swap(_M_ptr, __s._M_ptr);
_M_refcount._M_swap(__s._M_refcount);
@ -1322,7 +1328,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
private:
// Used by __enable_shared_from_this.
void
_M_assign(_Tp* __ptr, const __shared_count<_Lp>& __refcount)
_M_assign(_Tp* __ptr, const __shared_count<_Lp>& __refcount) noexcept
{
_M_ptr = __ptr;
_M_refcount = __refcount;
@ -1340,7 +1346,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
// 20.8.13.3.7 weak_ptr specialized algorithms.
template<typename _Tp, _Lock_policy _Lp>
inline void
swap(__weak_ptr<_Tp, _Lp>& __a, __weak_ptr<_Tp, _Lp>& __b)
swap(__weak_ptr<_Tp, _Lp>& __a, __weak_ptr<_Tp, _Lp>& __b) noexcept
{ __a.swap(__b); }
template<typename _Tp, typename _Tp1>
@ -1374,12 +1380,12 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
class __enable_shared_from_this
{
protected:
constexpr __enable_shared_from_this() { }
constexpr __enable_shared_from_this() noexcept { }
__enable_shared_from_this(const __enable_shared_from_this&) { }
__enable_shared_from_this(const __enable_shared_from_this&) noexcept { }
__enable_shared_from_this&
operator=(const __enable_shared_from_this&)
operator=(const __enable_shared_from_this&) noexcept
{ return *this; }
~__enable_shared_from_this() { }
@ -1396,14 +1402,14 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
private:
template<typename _Tp1>
void
_M_weak_assign(_Tp1* __p, const __shared_count<_Lp>& __n) const
_M_weak_assign(_Tp1* __p, const __shared_count<_Lp>& __n) const noexcept
{ _M_weak_this._M_assign(__p, __n); }
template<typename _Tp1>
friend void
__enable_shared_from_this_helper(const __shared_count<_Lp>& __pn,
const __enable_shared_from_this* __pe,
const _Tp1* __px)
const _Tp1* __px) noexcept
{
if (__pe != 0)
__pe->_M_weak_assign(const_cast<_Tp1*>(__px), __pn);

4
libstdc++-v3/testsuite/20_util/shared_ptr/cons/43820_neg.cc
View File

@ -32,9 +32,9 @@ void test01()
{
X* px = 0;
std::shared_ptr<X> p1(px); // { dg-error "here" }
// { dg-error "incomplete" "" { target *-*-* } 766 }
// { dg-error "incomplete" "" { target *-*-* } 768 }
std::shared_ptr<X> p9(ap()); // { dg-error "here" }
// { dg-error "incomplete" "" { target *-*-* } 858 }
// { dg-error "incomplete" "" { target *-*-* } 862 }
}

6
libstdc++-v3/testsuite/20_util/weak_ptr/comparison/cmp_neg.cc
View File

@ -45,9 +45,9 @@ main()
// { dg-warning "note" "" { target *-*-* } 370 }
// { dg-warning "note" "" { target *-*-* } 365 }
// { dg-warning "note" "" { target *-*-* } 357 }
// { dg-warning "note" "" { target *-*-* } 1099 }
// { dg-warning "note" "" { target *-*-* } 1094 }
// { dg-warning "note" "" { target *-*-* } 1086 }
// { dg-warning "note" "" { target *-*-* } 1103 }
// { dg-warning "note" "" { target *-*-* } 1098 }
// { dg-warning "note" "" { target *-*-* } 1090 }
// { dg-warning "note" "" { target *-*-* } 485 }
// { dg-warning "note" "" { target *-*-* } 479 }
// { dg-warning "note" "" { target *-*-* } 469 }