用C ++方法创建模板类？

Question

How can I do the following, without having to include every class T in this file?:

// ComponentMan.h
class ComponentMan
{
public:
    template<class T>
    void CreateComponent<T>()
    {
        T* temp = new T();
    }
}

Basically, I want a generic class instantiater. How can I achieve this without including headers everywhere?

Answer 1

You do it the other way round; you include "ComponentMan.h" everywhere you want to use it. eg:

foo.h

class Foo {
    ...
};

blah.cpp

#include "foo.h"
#include "ComponentMan.h"

void bar() {
    ComponentMan man;
    man.CreateComponent<Foo>();
}