hiding type in class declaration

[Lukasz Slusarczyk]

I'm writting sth.h file like that:

class sth {
public:
...
private:
list<sthelse> somevariable
};

and implement it in file sth.cpp,
but I have to write #include <list> in sth.h

I wold rather have something like that:

in sth.h:
class sth {
public:
...
private:
sth_type somevariable;
};

and the line
#include <list>
only in sth.cpp file

What's the way I should write sth.h and sth.cpp to gain that?
Great thanks for any answer to this basic question

 

[Antonio]

I'm writting sth.h file like that:

in .h:

struct PRIVATESTRUCT;

class sth {
public:
...
private: PRIVATESTRUCT *struct;
};

and in .cpp
struct PRIVATESTRUCT
{
list <blablabla> list;
};

 

[Jonathan Mcdougall]

I'm writting sth.h file like that:

class sth {
public:
...
private:
list<sthelse> somevariable
};

and implement it in file sth.cpp,
but I have to write #include <list> in sth.h

So what ?

I wold rather have something like that:

in sth.h:
class sth {
public:
...
private:
sth_type somevariable;
};

Make sth_type another class, but you'll have to include the class's
header in order to use it, and that header would include <list>
anyways. The solution would be to make 'somevariable' an opaque
pointer to that class, but then that would be quite inneficient.

What is the problem? Maybe we'll find another way.


Jonathan