topic Re: difference between %nrbquote and %superq in SAS Programming

difference between %nrbquote and %superq

kaushal2040 — Wed, 12 Nov 2014 13:50:07 GMT

Hello Forum,

I have following code that uses %nrbquote and %superq to give the same results. I was curious what is the difference between them. Can I use %nrbquote in place of %superq and vice vera? Thanks for any insights.

%let a=%nrstr(Kaushal&Alex);

%let c=%nrquote(&a);

%put &c;

%let a=%nrstr(Kaushal&Alex);

%let c=%superq(a);

%put &c;

Re: difference between %nrbquote and %superq

RW9 — Wed, 12 Nov 2014 13:59:45 GMT

https://support.sas.com/documentation/cdl/en/mcrolref/61885/HTML/default/viewer.htm#a001061316.htm

For %superq its on the left in the tree view.

Re: difference between %nrbquote and %superq

Loko — Wed, 12 Nov 2014 14:19:26 GMT

Hello,

I have also tried to figure out differences between the 2 functions and I could hardly find. There is one situation where I have found differences :

data _null_;
call symput('word', 'ben&jerry');
run;

%put &word;
%put %nrbquote(&word); -->ISSUES WARNING
%put %superq(word);-->DOES NOT ISSUE WARNING

Re: difference between %nrbquote and %superq

Astounding — Wed, 12 Nov 2014 15:15:43 GMT

Loko,

%nrbquote will continue to resolve macro variable references. To see the difference (and perhaps shed some light on why you get a warning), try adding this statement before you run your code:

%let jerry=jamin;

Re: difference between %nrbquote and %superq

kaushal2040 — Wed, 12 Nov 2014 16:23:00 GMT

Hello Astounding,

In this code, I am not sure why macro variable Alex is not resolved in %nrbquote? As you mentioned "%nrbquote will continue to resolve macro variable references".

%let Alex=Jamin;

%let a=%nrstr(Kaushal&Alex);

%let c=%nrquote(&a);

%put &c;

Re: difference between %nrbquote and %superq

Astounding — Wed, 12 Nov 2014 17:22:54 GMT

Kaushal,

In Loko's code, there was a live (unquoted) & captured by CALL SYMPUT.

In your code, the & is quoted by %nrstr. All the subsequent quoting functions maintain the quoted status of the &, thus there is no resolution of &Alex.

To illustrate, also try:

%put %unquote(&c);

It's always a good thing to run tests when using quoting functions in macro language!

Good luck.

Re: difference between %nrbquote and %superq

kaushal2040 — Wed, 12 Nov 2014 18:00:24 GMT

Great !!! Thanks a bunch, Astounding.

Re: difference between %nrbquote and %superq

sas247 — Tue, 25 Oct 2016 13:47:10 GMT

SUPERQ masks the same characters as the %NRBQUOTE function. However, %SUPERQ does not attempt to resolve anything in the value of a macro variable. %NRBQUOTE attempts to resolve any macro references or macro variable values in the argument before masking the result.

SUPERQ is the only quoting function that prevents the resolution of macro variables and macro references in the value */
of the specified macro variable.*/

SUPERQ accepts only the name of a macro variable as its argument, without an ampersand, and the other quoting functions accept any text expression, including constant text, as an argument.*/