Michael Van Canneyt via fpc-pascal <fpc-pascal@lists.freepascal.org> schrieb am Di., 15. Feb. 2022, 15:29:
> > > On Tue, 15 Feb 2022, Ryan Joseph via fpc-pascal wrote: > > > > > > >> On Feb 15, 2022, at 8:26 PM, Sven Barth via fpc-pascal < > fpc-pascal@lists.freepascal.org> wrote: > >> > >> It's relatively "easy" to implement assigning a nested function to > function references. However assigning a nested function variable to a > function reference is much harder. > >> Assigning a function reference to a nested function variable is hard as > well. > >> > > > > I'm getting lost with the terms now I think. > > If your function takes a function reference parameter and you assign it > a nested function pointer, > > this is difficult? I believe this was Michaels request in that code > snippet. > > Sven will need to confirm, but as I understand it: > > Procedure DoDemo(aTest : TProc); > > Procedure MyTest; > > Procedure DoSub; > begin > end; > > begin > DoDemo(DoSub) > end; > > is easy. > > but > > Procedure DoDemo(aTest : TProc); > > Procedure MyTest; > > Var > ASub : procedure is nested; > > begin > aSub:=SomeFunctionThatReturnsANestedProc; > DoDemo(aSub); > end; > > is difficult. > Correct (yes, I saw your addendum). Regards, Sven >
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