object.dc

Object-Oriented Programming With ANSI-C这本书中的源代码!找了很久

#include <stdlib.h>
#include <string.h>

//	Object

% Object ctor {
	return _self;
}

% Object dtor {
	return _self;
}

% Object differ {
	return _self != b;
}

% Object puto {
	const struct Class * class = classOf(_self);

	return fprintf(fp, "%s at %p\n", class -> name, _self);
}

% delete {
	if (_self)
		free(dtor(_self));
}

% classOf {
%casts
	assert(self -> class);
	return self -> class;
}

% sizeOf {
	const struct Class * class = classOf(_self);

	return class -> size;
}

//	Class

% Class dtor {
%casts
	fprintf(stderr, "%s: cannot destroy class\n", self -> name);
	return 0;
}

% new {
	struct Object * object;
	va_list ap;
%casts
	assert(self -> size);
	object = calloc(1, self -> size);
	assert(object);
	object -> class = self;
	va_start(ap, _self);
	object = ctor(object, & ap);
	va_end(ap);
	return object;
}

% super {
%casts
	assert(self -> super);
	return self -> super;
}

//	initialization
//    _Class and _Object are statically initialized structures

extern const struct Class _Object;
extern const struct Class _Class;

%init

static const struct Class _Object = {
	{ & _Class },
	"Object", & _Object, sizeof(struct Object),
	Object_ctor, Object_dtor, Object_differ, Object_puto
};

static const struct Class _Class = {
	{ & _Class },
	"Class", & _Object, sizeof(struct Class),
	Class_ctor, Class_dtor, Object_differ, Object_puto
};

const void * Object = & _Object;
const void * Class = & _Class;