>Why you can't check it as
>if hb_IsBlock( oClass:bDraw )
> Eval( oClass:bDraw )
>endif
Hi Petr,
This is exactly the problem: I have a codeblock, but sometimes I need
set it to nil and I can´t due data type protection. So now I´m
converting all calls to:
oClass:bDraw = {||nil}
and always I
Hi again,
- Original Message -
From: "Petr Chornyj" <[EMAIL PROTECTED]>
To:
Sent: Tuesday, October 14, 2008 6:48 PM
Subject: Re: Re: [Harbour] Inconsistency in DATA Types
[EMAIL PROTECTED] wrote:
BTW I can change empty codeblock datas from nil to {||nil} an
[EMAIL PROTECTED] wrote:
>
>
> BTW I can change empty codeblock datas from nil to {||nil} and eval it
> always, instead check it.
>
>
Why you can't check it as
if hb_IsBlock( oClass:bDraw )
Eval( oClass:bDraw )
endif
Regards,
Petr
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Hi Przemek,
>Think about it but base type checking should not be touched.
>Otherwise IMO we should remove it at all because it stops to
>give expected RT protection and we can keep it as source code
>decoration just like in xHarbour.
Remove no. This is a nice feature and help me to find some hidd
so I'd prefer sth different what will keep current PP syntax.
Even such minor modification resolved the problem.
DATA bDraw AS ?CODEBLOCK INIT nil
But we can also use sth what will allow to mix types, f.e.:
DATA bDraw AS CODEBLOCK | NIL
or we can support additionally: AS { [,]}, f.e.:
DATA
On Tue, 14 Oct 2008, [EMAIL PROTECTED] wrote:
Hi Toninho,
> I don´t know if this is an feature or a problem. If I have
> DATA bDraw AS CODEBLOCK INIT nil
INIT clause is unprotected and allow to assign any value with
declared type respecting.
> bDraw accept NIL without problem, but I can´t set i
[EMAIL PROTECTED] wrote:
IMHO codeblock types can receive nil to easy checking, like:
if !( oClass:bDraw == nil )
Eval( oClass:bDraw )
endif
I agree with you, but I also think other "types" of variables should
accept NIL as well.
Regards
Alex
Hi Toninho, and all
to elaborate on this, it might be a good idea to introduce syntax for
nullable (nilable) types, just like in C#
it would suffice to assert a declaration with type info, followed by a
question mark
DATA bDraw AS CODEBLOCK? INIT nil
Then this var can be set to a CODEBLOCK or
