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boost :: scoped_ptr的和std ::的unique_ptr的区别 是之间的唯一不同boost::scoped_ptr<T>和std::unique_ptr<T>的事实std::uni

2017-09-14 17:34 435 查看


boost :: scoped_ptr的和std ::的unique_ptr的区别

是之间的唯一不同
boost::scoped_ptr<T>
std::unique_ptr<T>
的事实
std::unique_ptr<T>
有移动的语义,而
boost::scoped_ptr<T>
只是一个GET
/重置智能指针?

--------------解决方案-------------

A unique_ptr is also known as std::unique_ptr. Before C++11 it was boost::unique_ptr, but became a part of STD library in C++11 and is now called
std::unique_ptr.

A scoped_ptr is generally known as boost::scoped_ptr, and is from the “ancient” ages before C++11 came along with the <memory> header with std::unique_ptr (and std::shared_ptr). Note
that there is NO such thing as std::scoped_ptr! Only boost::scoped_ptr and std::unique_ptr. Generally, its std::unique_ptr you should use.

If you’ve been using boost, and have any 
scoped_ptr
 lying around, you
can (almost always) safely replace them with 
std::unique_ptr
. There
are a few subtle differences between scoped_ptr and unique_ptr, but they are mostly an artifact on how “old” they are.
 boost::scoped_ptrconst std::unique_ptr
CopyableNoNo
 Movable No Yes
Related: Memory leak
with scoped_ptr

If you want to disallow moving with 
std::unique_ptr
, use 
const
std::unique_ptr
.
 boost::scoped_ptrconst std::unique_ptr
CopyableNoNo
 Movable No No
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