bind is not a member of std

Question

I am using netbeans 7.2.1 with minwg compiler. I am getting the following error messages when trying to build the application:

error: 'function' in namespace 'std' does not name a type

error: 'bind' is not a member of 'std'

although I included functional.h in the begining of the file, and I am using 'function' and 'bind' in the form of: std::function and std::bind

Where is the problem? Is it in the compiler or there is something missing? I remember that I compiled and ran the same application successfully on visual studio 2010.

Answer 1

It is not functional.h , it is just functional .

#include <functional> //without .h

Note that std::function and std::bind come with C++11 only. So you might have to upgrade your compiler in case you have not done yet.

Also, compile your code with -std=c++11 option:

$ g++ -std=c++11 file.cpp

That should work if you've upgraded your compiler. If your compiler is a bit old, you can also try -std=c++0x instead.

Answer 2

You need to include the header functional . It is available in C++11 . If you are still having problems, then your compiler may not support C++11 yet. Try upgrading.

Answer 3

你也可以使用boost :: bind：

#include <boost/bind.hpp>