Question

If I have multiple class and I want to have them all come under the same namespace and in my project I just want to have one include and that will give me all of the classes how would I go about doing this? I have played around with this but keep hitting a dead end.

Thanks in advance.

Answer 1

If you want only one include, namespaces have nothing to do with this.

You can create a file that only contains #include statements.

Something like this:

//classes file
#include "classA"
#include "classB"
#include "classC"

And the include all of them with only one include

#include "classes"

A real example can be found in the STL.

Take vector for instance:

#ifndef _GLIBCXX_VECTOR
#define _GLIBCXX_VECTOR 1

#pragma GCC system_header

#include <bits/stl_algobase.h>
#include <bits/allocator.h>
#include <bits/stl_construct.h>
#include <bits/stl_uninitialized.h>
#include <bits/stl_vector.h>
#include <bits/stl_bvector.h> 

#ifndef _GLIBCXX_EXPORT_TEMPLATE
# include <bits/vector.tcc>
#endif

#ifdef _GLIBCXX_DEBUG
# include <debug/vector>                                                        
#endif

#endif /* _GLIBCXX_VECTOR */

You get all of this by just doing #include <vector>