----- Original Message ----- From: "Michael Van Canneyt" <[EMAIL PROTECTED]> To: "FPC-Pascal users discussions" <fpc-pascal@lists.freepascal.org> Sent: Thursday, March 09, 2006 9:36 AM Subject: Re: [fpc-pascal] Variable arguments, different types?
> > > On Thu, 9 Mar 2006, L505 wrote: > > > > > > >> > >>> I have also read people stating things like this before: > >>> > >>> "you can use array of const but you can't make functions like writeln > >>> because writeln accepts multiple types". > >> > >> Usually the statement is about different _numbers_ of arguments, not > >> different types. Writing subroutine which accept different types for > >> their arguments has never been a problem in Pascal. > > > > I was talking specifically about array of const, not Pascal in general. The docs > > do not make it clear that array of const can accept different types in "one > > call". We are talking purely about "array of const" here, not the Pascal > > language in general. Of course I know the Pascal language can accept multiple > > types in one call. > > > >> > >>> But in fact, with array of const, you can use multiple types. > >> > >> You can, just as you can use different types in record types. > >> Still, the actual argument type would be the type of the record or, as in > >> your case "array of const" then. Don't confuse that. > > > > Well you are nitpicking my email :-). I'm not confused at all - the docs are. > > As the author of the docs, I feel compelled to protest: > > "This is a special case of the Open array construction, where it is > allowed to pass any expression in an array to a function or procedure." > > The "any expression" is the keyword here... > > But, to make it more explicit, I have added > "Each element of the array can have a different type." > > And have added some examples where the elements have different types. Sorry Michael, my emails sound a bit harsh some times. I was just wondering if this was actually supposed to be possible? I don't think I've ever seen anyone use this trick before. It's kind of like Perl. Dangerous, weak typing. I wonder how slow it is since it is a run time check :-) _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
