std::experimental::weak_ptr<T>:: weak_ptr
From cppreference.com
<
cpp
|
experimental
|
weak ptr
|
constexpr
weak_ptr
(
)
noexcept
;
|
(1) | (library fundamentals TS) |
|
weak_ptr
(
const
weak_ptr
&
r
)
noexcept
;
|
(2) | (library fundamentals TS) |
|
template
<
class
Y
>
weak_ptr ( const weak_ptr < Y > & r ) noexcept ; |
(2) | (library fundamentals TS) |
|
template
<
class
Y
>
weak_ptr ( const std:: experimental :: shared_ptr < Y > & r ) noexcept ; |
(2) | (library fundamentals TS) |
|
weak_ptr
(
weak_ptr
&&
r
)
noexcept
;
|
(3) | (library fundamentals TS) |
|
template
<
class
Y
>
weak_ptr ( weak_ptr < Y > && r ) noexcept ; |
(3) | (library fundamentals TS) |
Constructs a new
weak_ptr
that potentially shares an object with
r
.
1)
Default constructor. Constructs empty
weak_ptr
.
2)
Constructs new
weak_ptr
which shares an object managed by
r
. If
r
manages no object,
*
this
manages no object too. The templated overloads don't participate in overload resolution unless either
Y*
is implicitly convertible to
T*
, or
Y
is the type "array of
N
U
" for some type
U
and some number
N
, and
T
is the type "array of unknown bound of (possibly cv-qualified)
U
".
3)
Move constructors. Moves a
weak_ptr
instance from
r
into
*
this
. After this,
r
is empty and
r.
use_count
(
)
==
0
. The templated overload doesn't participate in overload resolution unless either
Y*
is implicitly convertible to
T*
, or
Y
is the type "array of
N
U
" for some type
U
and some number
N
, and
T
is the type "array of unknown bound of (possibly cv-qualified)
U
".
Parameters
| r | - | a std::experimental::shared_ptr or std::experimental::weak_ptr that will be viewed by this std::experimental::weak_ptr |
Exceptions
noexcept
specification:
noexcept
Example
|
This section is incomplete
Reason: no example |
See also
creates a new
weak_ptr
(public member function of
std::weak_ptr<T>
)
|
|
assigns the
weak_ptr
(public member function of
std::weak_ptr<T>
)
|