Date: Thu, 26 Sep 2002 16:01:01 -0400
Reply-To: Quentin McMullen <QuentinMcMullen@WESTAT.COM>
Sender: "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From: Quentin McMullen <QuentinMcMullen@WESTAT.COM>
Subject: Re: Deleting a macro variable? SYMDEL FLUFF
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> From: Fehd, Ronald J. (PHPPO) [mailto:rjf2@CDC.GOV]
> > From: Ian Whitlock [mailto:WHITLOI1@WESTAT.com]
> > What is your system smoking?
> > Mine is SAS 8.2 under Windows 98.
> > Maybe you need an anti-smoking patch for your 8.2.
> by golly, you're right, Ian!
> Little Birdies must have read my whining note to TechSupport
> in v8.(<2)
> and took pity on me for trying to set %global macro variables
> in one macro
> and then try to erase them in another macro.
> Note to Self: go find and fix that
> call execute('%symdel ' !! "&MVAR.");
> inside my second macro.
Even if you *tried* to use symdel to delete a local macro variable, it won't
work. Below shows that with a global and local macro variable of the same
name, %symdel inside a macro will delete the global var. Which is in line
with the help info:
"%symdel Deletes the specified variable(s) from the MACRO global table"
I guess if someone wanted to delete a local macro variable, they're out of
luck. But that seems fair, since local macro vars are kind enough to go
away by themselves...
4281 %let junk=1; /*global macro var &junk*/
4282 %macro me;
4283 %local junk; /*local &junk*/
4284 %let junk=2; /*local &junk*/
4285 %symdel junk; /*deletes global &junk*/
4286 %put junk=&junk; /*puts local &junk*/
4287 %mend me;
4289 %put junk=&junk;
WARNING: Apparent symbolic reference JUNK not resolved.