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Comment by flohofwoe

10 hours ago

The usual solution for this is:

    typedef struct bla_s { ... } bla_t;

Now you have a struct named 'bla_s' and a type alias 'bla_t'. For the forward declaration you'd use 'bla_s'.

Using the same name also works just fine, since structs and type aliases live in different namespaces:

    typedef struct bla_t { ... } bla_t;

...also before that topic comes up again: the _t postfix is not reserved in the C standard :)

3 comments

flohofwoe

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apaprocki  6 hours ago

Yes, using the same Gtk example, the way you’d forward declare GtkLabel without including gtklabel.h in your header would be:

    struct _GtkLabel;
    typedef struct _GtkLabel GtkLabel;
    // Use GtkLabel* in declarations

  • 1718627440  4 hours ago

    Why are you complicating things? Struct and Unions are different namespaces for a reason.

        typedef struct GtkLabel GtkLabel;

    works just fine.

warmwaffles  6 hours ago

People getting hung up on `_t` usage being reserved for posix need to lighten up. I doubt they'll clash with my definitions and if does happen in the future, I'll change the typedef name.