Re: Quick question on Glib style/design

[muppet <scott asofyet org>]

On Aug 3, 2004, at 10:16 PM, Ryan McDougall wrote:

> On Tue, 2004-03-08 at 07:46 -0400, muppet wrote:
>
> [snip]
> > but this is also, in general, Not A Good Thing as you have totally 
> > sidestepped the compiler's type checking.  for example, image 
> > somebody
>
> But to me it seems as if Glib totally side-stepped C type checking 
> anyways, since everything needs to be cast anyways.

not quite.  notice that most gtk+ constructors return GtkWidget*?

  GtkWidget * foo;
  GtkContainer * container;

  container = (GtkContainer*) gtk_window_new (GTK_WINDOW_TOPLEVEL);

  /* no casts necessary here */
  foo = gtk_button_new ();
  gtk_widget_show (foo);
  gtk_container_add (container, foo);
  gtk_container_set_border_width (container, 6);

and the compiler will warn me if i do the wrong thing, such as trying 
to pass container to gtk_widget_show().  thus, you use the cast macro, 
which usually expands to a run-time type check:

  gtk_widget_show (GTK_WIDGET (container));


--
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