Re: templates and abstract base classes

From:

Victor Bazarov <v.Abazarov@comAcast.net>

Newsgroups:

comp.lang.c++

Date:

Thu, 19 Jun 2008 10:33:39 -0400

Message-ID:

<g3dqo4$qbr$1@news.datemas.de>

Dan Smithers wrote:

Is it possible to realise an abstract base class with a template?

"Realise"? Do you mean instantiate or implement?

> The

reason that I'm considering this is that I would like to present a fixed
interface that I realise

Ah... You probably mean "implement".

> using a completely independent implementation

module and avoid including the template code in the client code.

Why is it a template?

I want something like this:

interface.

ILog
{
public:
virtual void method() = 0;
virtual ~ILog;

virtual ~ILog();

  static ILog& create();
protected:
  ILog();
};

realisation:

template <typename T>
class CLog:ILog
{
public:
  virtual void method();
  virtual ~CLog;

virtual ~CLog();

static CLog& create();
protected:
CLog();
}

;

Am I actually trying to make this more complicated than it needs to be?

"More complicated" - in what sense? I don't see the use of 'T' anywhere
in your 'CLog'. What would be the point? How would you use your 'CLog'
template?

V
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