On Fri, 22 Feb 2013, dhkblas...@zeelandnet.nl wrote:
Hi,
I'm porting a piece of software to FPC but I got stuck at a forward struct
declaration. The situation is as folows.
Header 1 declares:
struct TaskHandle__;
typedef void (*CallBackProcPtr)(struct TaskHandle__ *task);
And Header2 provdes:
typedef struct TaskHandle__ { int unused; } *TaskHandle
However header 2 already references header 1 because it already contains
some other type definitions, so I cannot reference header 2 in header 1
because of a circular dependency. Can FPC do something similar to C and
define a forward record?
No. What you can do is merge the headers in a single unit:
PTaskHandle__ = ^TTaskHandle__;
and define TTaskHandle__ in the same block
The CallBackProcPtr only needs a pointer, so you could also simply define a
pointer.
Michael.
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