On 22.02.2013 09:57, 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?
A: You could move the declaration of TaskHandle__ to a common unit which is used by the other two units.
B: As the TaskHandle__ type seems rather simple move it to the Header 1 unit with a comment "was originally declared in Header 1" (because Header 2 already uses Header 1)
C: You could treat the "task" parmeter for the callback simply as a pointer... (of course you reduce static typing with this)
Regards, Sven _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
