[Seed7-users] Forward declarations

[Conrad S. <con...@gm...>]

Hi

Learning seed7, so please be gentle :-)

I'm trying to implement a struct containing elements that are pointers
to (or references of) the same struct.

Something like
const type: tn is new struct
    var ptr struct tn: left is NIL;
    var ptr struct tn: right is NIL;
    var integer: item is 0;
end struct;

In C it would look like this:
typedef struct tn {
    struct tn*    left;
    struct tn*    right;
    int           item;
}

Is there a way to achieve this? FWIW this is for a binary tree with
integer items.

Thanks,
Conrad

-- 
-----------------------------------------------------------------------------
Conrad D. Steenberg Ph.D.            con...@ca...
Scientific Software Engineer         http://www.nupack.org
Pierce Bio-Engineering Lab           Mail Code 114-96
California Institute of Technology   Pasadena, CA, 91125