On Thursday 09 March 2006 16:23, L505 wrote:
> Well you are nitpicking my email :-).
Maybe. I'm known for doing that sometimes. I also even tend to write
"SizeOf (byte)" instead of "1".
> I'm not confused at all - the docs are.
Are they?
"My" Free Pascal: Reference Guide states:
|10.3.6 Array of const
[...]
|Inside the procedure body, the array of const is equivalent to an open
|array of TVarRec:
|
|Procedure Testit (Args: Array of const);
|
|Var I : longint;
|
|begin
[...]
| For i:=0 to High(Args) do
| begin
| write ('Argument ',i,' has type ');
| case Args[i].vtype of
| vtinteger :
| Writeln ('Integer, Value :',args[i].vinteger);
| vtboolean :
| Writeln ('Boolean, Value :',args[i].vboolean);
| vtchar :
| Writeln ('Char, value : ',args[i].vchar);
| vtextended :
| Writeln ('Extended, value : ',args[i].VExtended^);
| vtString :
| Writeln ('ShortString, value :',args[i].VString^);
[...]
> All I was asking was why specifically in array of const's
> case, the docs did not make it clear I could pass multiple types in
> the same call. If you look in the examples in the docs page, all the
> examples show the programmer passing arguments of the same type in
> one call.
That's true. But looking at - for instance - SysUtils.Format should make
it clear, that an "array of const" is not limited to that.
> They only make it clear that you can pass multiple types in separate
> calls, not in the same call.
So you propose, the examples and maybe the text
|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.
^^^^^^^^^^^^^^
should be changed then? :-)
> > And you still can't just pass two arguments when the subroutine
> > expects only one
>
> Isn't this exactly what array of const is for? It allows you to use
> anywhere from 1 to unlimited parameters.
Yes. Still, it's only one argument. You can't just suddenly pass two
"array of const", can you?
Vin"Nitpicker"zent.
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