-/* $Id$
-
-This file is part of libmspcore
-Copyright © 2006-2008, 2011 Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
#ifndef MSP_CORE_APPLICATION_H_
#define MSP_CORE_APPLICATION_H_
namespace Msp {
/**
-Base class for applications. Inherit the main class from this and add a static
-member of type RegApp<MainClass>.
+Base class for applications. See also RegisteredApplication.
*/
class Application
{
protected:
- class RegBase
+ class Starter
{
- public:
- virtual Application *create_app(int, char **)=0;
- virtual void usage(const char *, const char *, bool)=0;
- virtual ~RegBase() { }
protected:
- RegBase();
- };
-
- template<typename T>
- class RegApp: public RegBase
- {
+ Starter();
public:
- Application *create_app(int argc, char **argv) { return new T(argc, argv); }
- void usage(const char *r, const char *a, bool b) { T::usage(r, a, b); }
+ virtual ~Starter() { }
+
+ virtual Application *create_app(int, char **) = 0;
};
bool done;
int exit_code;
private:
- static RegBase *reg_app_;
+ static Starter *starter_;
static Application *app_;
static void *data_;
+ Application(const Application &);
+ Application &operator=(const Application &);
protected:
Application();
public:
virtual ~Application() { }
static int run(int, char **, void * =0);
- static void usage(const char *, const char *, bool);
static void *get_data() { return data_; }
protected:
virtual void sighandler(int) { }
private:
static void sighandler_(int);
+};
- Application(const Application &);
- Application &operator=(const Application &);
+
+/**
+Registers the class to be used for program startup. The main application class
+should be derived from this.
+*/
+template<typename T>
+class RegisteredApplication: public Application
+{
+private:
+ class Starter: public Application::Starter
+ {
+ public:
+ Application *create_app(int argc, char **argv) { return new T(argc, argv); }
+ };
+
+ static Starter starter_;
+
+protected:
+ // Force the starter into existence
+ RegisteredApplication() { (void)starter_; }
};
+template<typename T>
+typename RegisteredApplication<T>::Starter RegisteredApplication<T>::starter_;
+
} // namespace Msp
#endif