English 中文(简体)
是否有一位聪明的协调人通过一名协调人援引某一成员的职能?
原标题:Does a smart pointer support invoking a member function via a pointer?
  • 时间:2012-04-16 11:34:19
  •  标签:
  • c++
#include <iostream>
#include <boost/shared_ptr.hpp>
#include <boost/make_shared.hpp>

class BASE
{
public:
    int fun1(int i){return i * 1;}
};

int main(){
    int (BASE::*pf2)(int);
    boost::shared_ptr<BASE> pB = boost::make_shared<BASE>();
    pf2 = &BASE::fun1;
    std::cout << (pB->*pf2)(3) << std::endl; // compile wrong: error: no match for  operator->*  in  pB ->* pf2 |
}

这是否意味着布恩斯特图书馆没有实施,而且不执行;* 经营者支持使用它来援引成员的职能点?

问题回答

请写:

std::cout << ((*pB).*pf2)(3) << std::endl;

如我检查的那样,Boost没有界定操作人<代码>->*,但可以确定(见C++标准,第5.5和13.5节)。

另外,C++11标准没有界定C++11智能点工的操作者。

我想你应该这样做:

std::cout << ((*pB).*pf2)(3) << std::endl;

although it s not tested.





相关问题
Undefined reference

I m getting this linker error. I know a way around it, but it s bugging me because another part of the project s linking fine and it s designed almost identically. First, I have namespace LCD. Then I ...

C++ Equivalent of Tidy

Is there an equivalent to tidy for HTML code for C++? I have searched on the internet, but I find nothing but C++ wrappers for tidy, etc... I think the keyword tidy is what has me hung up. I am ...

Template Classes in C++ ... a required skill set?

I m new to C++ and am wondering how much time I should invest in learning how to implement template classes. Are they widely used in industry, or is this something I should move through quickly?

Print possible strings created from a Number

Given a 10 digit Telephone Number, we have to print all possible strings created from that. The mapping of the numbers is the one as exactly on a phone s keypad. i.e. for 1,0-> No Letter for 2->...

typedef ing STL wstring

Why is it when i do the following i get errors when relating to with wchar_t? namespace Foo { typedef std::wstring String; } Now i declare all my strings as Foo::String through out the program, ...

C# Marshal / Pinvoke CBitmap?

I cannot figure out how to marshal a C++ CBitmap to a C# Bitmap or Image class. My import looks like this: [DllImport(@"test.dll", CharSet = CharSet.Unicode)] public static extern IntPtr ...

Window iconification status via Xlib

Is it possible to check with the means of pure X11/Xlib only whether the given window is iconified/minimized, and, if it is, how?

热门标签