Date:         Tue, 5 Sep 2006 15:07:49 +0000
Reply-To:     toby dunn <tobydunn@HOTMAIL.COM>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         toby dunn <tobydunn@HOTMAIL.COM>
Subject:      Re: Check if macro parameter is empty
Comments: To: yomsas@GMAIL.COM
In-Reply-To:  <6aa258df0609050738l12e3b193t52fc33b30504e291@mail.gmail.com>
Content-Type: text/plain; format=flowed

Yom ,

http://support.sas.com/onlinedoc/913/docMainpage.jsp
Go here and learn to use this site.

IF you would have cared to read about the qouting functions before you used
them you would have found out that %STR and %NRSTR are both compile time
quoting functions.  With a few characters difference teh do the same thing
at the same time.

Odds are you want the results of  %macrolist to be quoted.  DO the
following:

Ask yourself the following questions:

1.) Is there anything that needs to be qouted?

If the answer is NO then dont worry with quoting at all.

If yes then grab your coolaid and follow me:

2.) When does it need to be quoted, at compile time or execution time?

If the answer is compile time you have two choices:  %str and %Nrstr, read
up on them and learn teh differences between them.

If it is at execution time then you need to look at %bquote, %nrbquote,
%superQ.

3.) What needs to be quoted: commas, quotes ( single or double ), ampers,
percent signs, etc....

after you find this out then look for the right function to quote the right
character.


If I knew what you were trying to hide from the SAS processor I could help
you out a little more.  As it stands right now I dont know what you are
trying to hide.  Is it a quote (single or double) is it a amper or percent
sign, is it a comma, or a space?  Knowing these little things will make a
difference.


Toby Dunn

When everything is coming at you all at once, your in the wrong lane.

A truly happy person is someone who can smile and enjoy the scenery on a
detour.





From: yom <yomsas@GMAIL.COM>
Reply-To: yom <yomsas@GMAIL.COM>
To: SAS-L@LISTSERV.UGA.EDU
Subject: Re: Check if macro parameter is empty
Date: Tue, 5 Sep 2006 16:38:16 +0200

Thank you very much for your help !
But if I use %str I get the same error.

Here is the full code :


%macro example;

    %macro test(macrolist=);
        %if %str(&macrolist.) ne %then %do;
            %Put Not Empty!!! ;
        %End ;
        %Else %do ;
            %Put Empty!!! ;
        %End ;
    %mend;

    %test(macrolist=%NRSTR(%val(file=aaa)));

%mend;

%example;






2006/9/5, toby dunn <tobydunn@hotmail.com>:
>
>Yom ,
>
>First off your macro variable will never be empty the way you have it
>coded
>up:
>
>%mymacro1(file=&file1,varlist=&varlist1,outfolder=&outfolder1)
>
>Is always the results.  You should learn macros before you jump into using
>macro qouting. %Nrstr qoutes the value at compile time not execution time.
>
>
>%Macro Test( AAA = ) ;
>
>%If ( &AAA = ) %Then %Do ;
>%put Empty!!! ;
>%End ;
>%Else %do ;
>%Put Not Empty!!! ;
>%End ;
>%Mend ;
>
>%Test( AAA = )
>%Test( AAA = ABCD )
>
>
>
>Toby Dunn
>
>When everything is coming at you all at once, your in the wrong lane.
>
>A truly happy person is someone who can smile and enjoy the scenery on a
>detour.
>
>
>
>
>
>From: yom <yomsas@GMAIL.COM>
>Reply-To: yom <yomsas@GMAIL.COM>
>To: SAS-L@LISTSERV.UGA.EDU
>Subject: Check if macro parameter is empty
>Date: Tue, 5 Sep 2006 15:50:25 +0200
>
>Dear All,
>
>I have this statement :
>macrolist=%NRSTR(%mymacro1
>(file=&file1,varlist=&varlist1,outfolder=&outfolder1));
>I would like to test if macrolist is empty or not.
>If I use
>%if &macrolist. ne %then %do;
>......
>%end;
>I get this error message :
>ERROR: Required operator not found in expression: &macrolist. ne
>Please do you know what I have to add ?
>
>Thank you very much in advance !
>
>yom
>
>
>