Question

我正试图使用<代码>std:共享_ptr。我已经看到了关于这个问题的其他问题,但我仍在发现汇编错误。我是否接受适当的资格和设置?

我做了些什么:

我试图将我的代码与两位标题分别汇编成册:<memory>和<tr1/memory>,但在这两种情况下仍然有以下错误。

我使用的缩略语版本是

gcc --version
gcc (GCC) 4.3.2

When I include <memory> header I use std::shared_ptr and with the <tr1/memory> header I use std::tr1::shared_ptr? Is this correct?

I have set up the shared_ptr as follows:

std::shared_ptr<A*> ptr_A = shared_ptr( new A() );

我发现的错误如下:

src/WH.cxx:156: error:  shared_ptr  is not a member of  std 
src/WH.cxx:162: error:  shared_ptr  was not declared in this scope

when I try the <tr1/memory> header

src/WH.cxx:156: error:  std::tr1  has not been declared
src/WH.cxx:162: error:  shared_ptr  was not declared in this scope

象我这样看不出什么是正确的。任何想法?

我知道,增强图书馆有<条码>共享_ptr,但这些图书馆目前不是我的选择。

EDIT: Just to add, my compiler options are as follows: g++ -O3 -g3 -m32 -fPIC -Wno-deprecated -pthread -m32 Am I missing anything?

P.S. 是否有任何关于 st点的有用文献?

Answer 1

std::tr1::shared_ptr is part of the TR1 additions to the C++ STL.
With GCC, it is available either through #include <tr1/memory> (GCC 4.1) or #include <memory> (GCC 4.3)

Answer 2

你也要求参考或文献......

我发现3条可能有助于:

An article on Smart Pointers, which is an overview good for a general understanding.
An actual reference for std::shared_ptr.
A great tutorial discussing every method of TR1 shared_ptr along with sample code.

并对你的守则实例发表评论:

std::shared_ptr<A*> ptr_A = shared_ptr( new A() );

模板论点应当是A而不是A*:

std::shared_ptr<A> ptr_A = shared_ptr( new A() );

Answer 3

如果在座各位没有<代码>共享_ptr<>/code>,你可以加以利用。

#include <boost/shared_ptr.hpp>

boost::shared_ptr<A> ptr_A( new A() );

友情链接