Struct within struct?

[VeryGary]

I'm playing around with creating a UI for engines built using the Checkerboard API, but I'm having difficulty creating the struct required for calls to the .dll. The API documentation defines the C++ struct:

struct CBmove
{
int jumps; // number of jumps in this move
int newpiece; // moving piece after jump
int oldpiece; // moving piece before jump
struct coor from,to; // from,to squares of moving piece
struct coor path[12]; // intermediate squares to jump to
struct coor del[12]; // squares where men are removed
int delpiece[12]; // piece type which is removed
}

How do i go about creating a substruct within my DllStructCreate( "Struct" )? Do I somehow use Arrays in their place?

Edited November 26, 2011 by VeryGary

[martin]

You can just break the struct into its components and add then in sequence in the 'parent struct' in th ecorrect position. So if you have a struct like this

struct str1

{int a1, a2;

char dummy[80];

}

and you had it in a struct like this

Struct2

{int bb;

struct str1;

int figs[20];

}

then this is equivalent to

Struct2

{int BB;

int a1;

int a2;

char dummy[80];

int figs[20];

}

I think that transexx has a udf in example scripts for structs in structs. Definitely worth looking for.

[VeryGary]

Thanks.

[jchd]

You can also download the beta which introduces support for nested structs.

It seems stable enough now but of course it's still a beta.

[VeryGary]

The coord struct was just a "int; int". I ended up doing the following:

$a = "int; "
Const $JUMPS = 1; number of jumps in this move
$a &= "int; "
Const $NEWPIECE = 2; moving piece after jump
$a &= "int; "
Const $OLDPIECE = 3; moving piece before jump
$a &= "int; int; int; int; "
Dim Const $FROM[2] = [4,5] ; from,to squares of moving piece
Dim Const $TO[2] = [6,7]
For $t = 1 to 24
$a &= "int; "
Next
Dim Const $PATH[12][2] = [  [8,9],[10,11],[12,13],[14,15],[16,17],[18,19], _
[20,21],[22,23],[24,25],[26,27],[28,29],[30,31] ] ; intermediate squares to jump to
For $t = 1 to 24
$a &= "int; "
Next
Dim Const $DEL[12][2] = [ [32,33],[34,35],[36,37],[38,39],[40,41],[42,43], _
[44,45],[46,47],[48,49],[50,51],[52,53],[54,55] ] ; squares where men are removed
For $t = 1 to 12
$a &= "int"
If $t < 12 Then
$a &= "; "
EndIf
Next
Dim Const $DELPIECE[12] = [56,57,58,59,60,61,62,63,64,65,66,67]

Using the Const's for index values within the struct instead of the parameter name.

Edited November 27, 2011 by VeryGary