-#include <cll1h>
+#include "cll1.h"
-def_community(Drawable_object,Actions);
+/* This is example of advanced C<<1 object oriented features... */
-def_mem(Actions)
+def_type(Shape);
+
+def_mem(Interface)
{
- void method(init) (Drawable_object self, ...);
- void method(draw) (Drawable_object self);
- int method(desc) (Drawable_object self,int something);
+ void method(draw) (Shape self);
+ void method(move) (Shape self, int x, int y);
+ str method(desc) (Shape self);
+ void method(rename) (Shape self, str name);
+ void method(reset) (Shape self, int x1, int y1, int x2, int y2, int x3, int y3);
+ int method(area) (Shape self);
+ int count;
};
+/* We intentionaly define heterogenous objects, which share only the interface
+ binding. Not only we can use different order of variables, and different
+ names - but we can even store these data on remote systems, etc. */
+
def_mem(Tri)
{
- interface(Actions);
+ interface(Interface);
int x1, y1, x2, y2, x3, y3;
+ str name;
};
def_mem(Rect)
{
- interface(Actions);
+ interface(Interface);
+ str desc;
int x1, y1, x2, y2;
};
-construct_obj(Tri,Actions);
+def_mem(Circ)
+{
+ interface(Interface);
+ int x1, y1;
+ str comment;
+ int r;
+};
-construct_obj(Rect,Actions);
+def_community(Shape, Interface);
+/* Note: interface(Interface); has to be at first position in all objects asociated in community */
def_mem(Object_list)
{
- Drawable_object object;
+ Shape object;
list(Object_list);
};
-Actions init_tri_interface(Actions this)
-{
- this->init = init_tri;
- this->draw = draw_tri;
- this->desc = desc_tri;
-
- return this;
-}
-
-Actions init_rect_interface(Actions this)
-{
- this->init = init_tri;
- this->draw = draw_rect;
- this->desc = desc_rect;
- return this;
-}
+/* implementation of methods */
-void draw_tri(Drawable_object community)
+void drawTri(Shape community)
{
I_am(Tri);
- printf("imagine I am drawing %d,%d - %d,%d - %d,%d\n",
- self->x1,self->y1,self->x2,self->y2,self->x3,self->y3);
+ printf("Drawing %s: %d,%d - %d,%d - %d,%d .\n",
+ self->name, self->x1, self->y1, self->x2, self->y2, self->x3, self->y3);
};
-void draw_rect(Drawable_object community)
+void drawRect(Shape community)
{
I_am(Rect);
- printf("imagine I am drawing %d,%d - %d,%d\n",
- self->x1,self->y1,self->x2,self->y2);
+ printf("Drawing %s: %d,%d - %d,%d .\n",
+ self->desc, self->x1, self->y1, self->x2, self->y2);
};
-int desc_tri(Drawable_object community,int something)
+void drawCirc(Shape community)
{
- I_am(Tri);
+ I_am(Circ);
- printf("I am triangle %d,%d - %d,%d - %d,%d, method draw called with argument: %d\n",
- self->x1,self->y1,self->x2,self->y2,self->x3,self->y3,something);
+ printf("Drawing %s: %d,%d - r=%d .\n",
+ self->comment, self->x1, self->y1, self->r);
+};
- return something;
+void moveTri(Shape community, int x, int y)
+{
+ I_am(Tri);
+
+ self->x1 += x;
+ self->y1 += y;
+ self->x2 += x;
+ self->y2 += y;
+ self->x3 += x;
+ self->y3 += y;
};
-int desc_rect(Drawable_object community,int something)
+void moveRect(Shape community, int x, int y)
{
I_am(Rect);
- printf("I am rectangle %d,%d - %d,%d, method draw called with argument: %d\n",
- self->x1,self->y1,self->x2,self->y2,something);
+ self->x1 += x;
+ self->y1 += y;
+ self->x2 += x;
+ self->y2 += y;
+};
- return something;
+void moveCirc(Shape community, int x, int y)
+{
+ I_am(Circ);
+
+ self->x1 += x;
+ self->y1 += y;
};
-Tri init_tri(Drawable_object self, int x1, int y1, int x2, int y2, int x3, int y3)
+str descTri(Shape community)
+{
+ return "";
+}
+
+str descRect(Shape community)
+{
+ return "";
+}
+
+str descCirc(Shape community)
+{
+ return "";
+}
+
+int calcAreaTri(Shape community)
+{
+ return 0;
+}
+
+int calcAreaRect(Shape community)
+{
+ return 0;
+}
+
+int calcAreaCirc(Shape community)
+{
+ return 0;
+}
+
+void setTri(Shape community, int x1, int y1, int x2, int y2, int x3, int y3)
{
I_am(Tri);
-
+
self->x1 = x1;
self->y1 = y1;
self->x2 = x2;
self->y2 = y2;
self->x3 = x3;
self->y3 = y3;
-
- return self;
}
-Rect init_rect(Drawable_object self, int x1, int y1, int x2, int y2)
+void setRect(Shape community, int x1, int y1, int x2, int y2, int dummy1, int dummy2)
{
I_am(Rect);
self->y1 = y1;
self->x2 = x2;
self->y2 = y2;
+}
+
+void setCirc(Shape community, int x1, int y1, int r, int dummy1, int dummy2, int dummy3)
+{
+ I_am(Circ);
+
+ self->x1 = x1;
+ self->y1 = y1;
+ self->r = r;
+}
+
+void nameRect(Shape community, str name)
+{
+ I_am(Rect);
+
+ self->desc = name;
+}
+
+/* Example of using object interface methods from inside constructor methods */
+
+construct(Tri) (Tri self, int x1, int y1, int x2, int y2, int x3, int y3)
+{
+ self->name = "TRIANGLE";
+ interface_of(self)->count++;
+ _(reset, self, x1, y1, x2, y2, x3, y3);
+
+ return self;
+}
+
+construct(Rect) (Rect self, int x1, int y1, int x2, int y2)
+{
+ self->desc = "rectangle";
+ interface_of(self)->count++;
+ _(reset, self, x1, y1, x2, y2, 0, 0);
+
+ return self;
+}
+
+construct(Circ) (Circ self, int x1, int y1, int r)
+{
+ self->comment = "Circle";
+ interface_of(self)->count++;
+ _(reset, self, x1, y1, r, 0, 0, 0);
return self;
}
+/* registration of implemented methods to three interfaces of the same type */
+
+Interface triInterface(void)
+{
+ Get_mem(this, Interface);
+
+ this->draw = drawTri;
+ this->move = moveTri;
+ this->desc = descTri;
+ this->rename = NULL;
+ this->reset = setTri;
+ this->area = calcAreaTri;
+ this->count = 0;
+
+ return this;
+}
+
+Interface rectInterface(void)
+{
+ Get_mem(this, Interface);
+
+ this->draw = drawRect;
+ this->move = moveRect;
+ this->desc = descRect;
+ this->rename = nameRect;
+ this->reset = setRect;
+ this->area = calcAreaRect;
+ this->count = 0;
+
+ return this;
+}
+
+Interface circInterface(void)
+{
+ Get_mem(this, Interface);
+
+ this->draw = drawCirc;
+ this->move = moveCirc;
+ this->desc = descCirc;
+ this->rename = NULL;
+ this->reset = setCirc;
+ this->area = calcAreaCirc;
+ this->count = 0;
+
+ return this;
+}
+
+/* usage of objects inside C<<1 program */
+
program
{
- Init_mem(tri_interface,Actions,init_tri_interface);
- Init_mem(rect_interface,Actions,init_rect_interface);
- Object_list all = NULL, one = get_mem(Object_list);
+ Interface triangles = triInterface();
+ Interface rectangles = rectInterface();
+ Interface circles = circInterface();
+ Object_list all = NULL, one;
- one->object = init_obj_as(Drawable_data, Rect, rect_interface, 0, 10, 1, 11);
- append(one,all);
- one->object = init_obj_as(Drawable_data, Tri, tri_interface, 0, 0, 0, 4, 3, 0);
- append(one,all);
- one->object = init_obj_as(Drawable_data, Rect, rect_interface, 10, 0, 11, 1);
- append(one,all);
-
- for_each(one,all)
+ one = get_mem(Object_list);
+ one->object = get_obj_as(Shape, Rect, rectangles, 0, 10, 1, 11);
+ append(one, all);
+
+ one = get_mem(Object_list);
+ one->object = get_obj_as(Shape, Tri, triangles, 0, 0, 0, 4, 3, 0);
+ append(one, all);
+
+ one = get_mem(Object_list);
+ one->object = get_obj_as(Shape, Rect, rectangles, 10, 0, 11, 1);
+ append(one, all);
+
+ one = get_mem(Object_list);
+ one->object = get_obj_as(Shape, Circ, circles, 10, 0, 5);
+ append(one, all);
+
+ printf("We have created %d triangles, %d rectangles and %d circles:\n",
+ triangles->count, rectangles->count, circles->count);
+
+ for_each(one, all)
{
- printf("(return value %d)\n", _(one->object,desc));
- _(one->object,draw);
+ _(draw, one->object);
+ printf("Area of this %s is %d (square pixels).\n", _(desc, one->object), _(area, one->object));
+ printf("We have created %d instances of this type of object.\n", interface_of(one->object)->count);
+
+ if(interface_of(one->object) == rectangles)
+ {
+ _(reset, one->object, 0, 0, 1, 1, 0, 0);
+ _(rename, one->object, "Renamed rectangle");
+ }
+ else
+ {
+ _(move, one->object, 10, 10);
+ }
}
+
+ print("Rectangles were reset to new size and renamed, other objects were moved:");
+ for_each(one, all)
+ {
+ _(draw, one->object);
+ }
}
GIT.Harvie.CZ / svn / Cll1h / .git / blobdiff