Re: Function pointer in Ada?

["Marin David Condic" <dont.bother.mcondic.auntie.spam@[acm.org>]

Yes Ada (at least Ada95) can create pointers to functions. (General advice:
Think long and hard about why you want to use access to functions and ask
yourself if there is a more Ada-ish way to do the same thing - like using
tagged types with dispatching) Look at ARM 3.10 for the syntax, etc. An
example can be found in ARM 3.10(26) which for your convenience is:

26 type Message_Procedure is access procedure (M : in String := "Error!");
procedure Default_Message_Procedure(M : in String);
Give_Message : Message_Procedure := Default_Message_Procedure'Access;
...
procedure Other_Procedure(M : in String);
...
Give_Message := Other_Procedure'Access;
...
Give_Message("File not found."); -- call with parameter (.all is optional)
Give_Message.all; -- call with no parameters


MDC
--
Marin David Condic
Senior Software Engineer
Pace Micro Technology Americas    www.pacemicro.com
Enabling the digital revolution
e-Mail:    marin.condic@pacemicro.com


"Henrik Quintel" <henrik.quintel@gmx.de> wrote in message
news:5f4adaeaa2a7b35810acd4e20fb98b25.86200@mygate.mailgate.org...
> Hi, as the most people know, in C there is the possibility to make use
> of a function pointer. In Ada this not possible. Does someone knows how
> is it possible to make use of such a feature like a function pointer in
> Ada? I know it is difficult but perhaps someone knows.
>