OT macro operator

[Detlef Hoefner]

Hi All,

a very stupid question but it's driving me nuts.
I want to update a field in a dbf.
The field name is defined in an array.

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#define DB_DBF 1
#define DB_FLD 2

LOCAL aDbf := {;
            { "dbf_1", "fiel_name_1" },;
            { "dbf_2", "fiel_name_2" },;
             ...
            { "dbf_n", "fiel_name_n" },;
    }


I can do

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use ( aDbf[n][DB_DBF] ) shared alias wrk new

But i can not

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wrk->&aDbf[n][DB_FLD] := uVal

I tried several variations. Either i get "invalid lvalue" at compile time or "&syntax error" at runtime.

So many years clippering but stumbling over such stupidity.
Sorry for bothering you.

Regards,
Detlef

[Richard Chidiak]

Detlef,

I remember some time ago having a similar problem

This is how i got it working

DT := "CLIENT" + ALLTRIM(SUBS(TABVAR[15][J],63,6))
REPLACE (MYFILE)->&DT WITH .....

HTH

Richard

[Detlef Hoefner]

Richard,

thanks a lot for your answer.
I just found an other workaround which i will also show, allthough it is dangerous code if the field doesn' t exist.

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wrk->( fieldput( fieldpos( aDbf[ n ][ DB_FLD ] ), uVal ) )

But thanks again, Richard.
Regards,
Detlef

[nageswaragunupudi]

This works:

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wrk->&( aDbf[n][DB_FLD] ) := uVal


Anyway my personal preference in such cases is fieldput and fieldpos. I try to avoid macros. Again its a matter of choice.

[Detlef Hoefner]

NageswaraRao,

many thanks for your answer.
As you i always avoided the use of the macro operator.
But therefor i have a poor knowledge about it.

Thanks again for your hint.

Regards,
Detlef

[Barry O'Brien]

Hi Detlef,

I had a similar problem just yesterday trying to do:

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cDBField := "ACNT_NBR"
REPLACE PAYMENT->&cDBField WITH cValue

This was causing the "&syntax error" you mentioned.

I fixed it by doing the following:

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cDBField := "PAYMENT->ACNT_NBR"
REPLACE &cDBField WITH cValue

Not sure if this will help in your circumstances but it worked for me.

Kind regards,

Barry

[Detlef Hoefner]

Thanks, Barry

the response in this forum is unbelievable.

Regards,
Detlef

[James Bott]

Detlef,

Aren't you using TData? Did you know that the data is already buffered?

In TData the fieldnames are stored in aFldnames.

Perhaps if you explain what you are trying to do, I can help with a TData solution.

James

[Detlef Hoefner]

James,

thanks for your kind offer.
But my problem concerned a mere MS DOS program where i had dbf and field names in an array and had to update those fields in a loop from each dbf.

Thanks and regards,
Detlef

[FiveWiDi]

Detlef,

Aren't you using TData? Did you know that the data is already buffered?

In TData the fieldnames are stored in aFldnames.

Perhaps if you explain what you are trying to do, I can help with a TData solution.

James

Where is Tdata class?

Thanks,
Carlos G.

[James Bott]

>Where is Tdata class?

TData is a commercial product I developed. You can read more about it and download a demo on my website.

http://ourworld.compuserve.com/homepage ... rogram.htm

James