How to control error when using an unknown variable

[Alain Aupeix]

Hi,

In my main prg, I declare buildate as memvar, and as public.

In a function, I have something like this line :

result=iif(buildate != NIL,"     Compilation : "+buildate+chr(10),"")

It works fine if the variable is defined as public. but I want, if the
variable isn't declared, to affect "" to result and continue without crash.

Is-it possible using this, and how ?

   #xcommand TRY              => s_bError := errorBlock( {|oErr| break(
oErr ) } ) ;;

                                 BEGIN SEQUENCE
   #xcommand CATCH [<!oErr!>] => errorBlock( s_bError ) ;;
                                 RECOVER [USING <oErr>] <-oErr-> ;;
                                 errorBlock( s_bError )
   #command FINALLY           => ALWAYS

Thanks
A+
--
------------------------------------------------------------------------
*Alain Aupeix*
Sites web : JujuLand <http://jujuland.pagesperso-orange.fr/> |
Pissobi-Lacassagne <http://pissobi-lacassagne.pagesperso-orange.fr/> |
Gadel <https://www.gadel-environnement.org/>
------------------------------------------------------------------------
X.ubuntu 16.04 | H.arbour 3.2.0-1 (r2023-12-07 19:00) | Hw.gui 2.23-5dev
(r3405) | G.ramps 5.1.2
------------------------------------------------------------------------

[trepao2...@gmail.com]

Perhaps:

IF Left(Type("buildDate"), 1) != "U"

    // Your code...

ENDIF

TYPE() Determine the type of an expression ------------------------------------------------------------------------------

Syntax TYPE(<cExp>) --> cType

Arguments <cExp> is a character expression whose type is to be determined. 

<cExp> can be a field, with or without the alias, a private or public variable, or an expression of any type.

Returns TYPE() returns one of the following characters:

TYPE() Return Values ------------------------------------------------------------------------

Returns Meaning --------------------------------------------------------------------

A Array 

B Block 

C Character 

D Date 

L Logical 

M Memo 

N Numeric 

O Object 

U NIL, local, or static 

UE Error syntactical 

UI Error indeterminate 

[Alain Aupeix]

Le 29/06/2024 à 18:58, trepao2...@gmail.com a écrit :

Left(Type("buildDate"), 1) != "U"

Works well ...

Thanks

A+

--

---

Alain Aupeix
Sites web : JujuLand | Pissobi-Lacassagne | Gadel

---

X.ubuntu 16.04 | H.arbour 3.2.0-1 (r2023-12-07 19:00) | Hw.gui 2.23-5dev (r3405) | G.ramps 5.1.2