我自己的copy（）函数与std :: copy（）冲突

Question

I have a header file. In this header I want to use a map for a class. But after I include I get a no matching function error , because I have a copy() function in the project(really big project). I saw on this website http://www.sgi.com/tech/stl/download.html that map contains a using std::copy so I guess it collides with that.

I cannot make any changes to the copy function, so is there a way I can use map in this header file ? (no other place). Is there a way so my copy functions don't collide ?

I use Visual Studio 2008 on Windows 7.

Answer 1

The error message suggests that your function is not visible to the translation unit, so make sure you include the header.

Also, I doubt <map> has anything like using std::copy . You sure about this one?

In algobase.h (which is not standard C++), the using directives are parsed only if __STL_USE_NAMESPACES is defined. You should undefine it before including the header:

#undef __STL_USE_NAMESPACES
#include "algobase.h"
#endif

Answer 2

You should be able to wrape the map include in a namespace ie

    namespace StopCollision
    { #include <map> }

Then the map copy function would be available via StopCollision::std::copy . This is very crude, but would solve your problem.

Answer 3

To the best of my knowledge the map stl class doesn't have a copy function. It is probably an include issue, you could try using a forward reference to the class that contains the map and copy function.