Create SAS macro to create a macro variable

Question

I have created a SAS macro, macro A, that takes in a variable name and returns transformed versions of that name i.e. if you run %A(asdf) you get out asdf_log asdf_exp asdf_10. I want to write another macro, macro B, that takes the output from the first macro and appends it together into a new macro variable.

%macro B(varList, outputName);
    %let &outputName = 
        %A(var1);
        %A(var2);
        ;
%mend

Is almost what I want to do, except that it obviously doesn't compile. I am also not sure if this is possible in SAS. As a further complication, the input to macro B is a list of variable that I want to run macro A for and append into one long list of variable names.

Why? Because I have a macro that runs on a list of variables and I want to run it on a transformed variable list.

Example: I have %let varList = x y; and I want as an output x_log x_exp x_10 y_log y_exp y_10. To do this I want two macros one, macro A, that returns the transformed variables names:

%macro A(var);
    &var._log
    &var._exp
    &var._10
%mend

I can't get the second macro (B as written above) to work properly.

Answer 1

So if the inner macro is just returning characters, that is it doesn't actually generate any non macro statements, then why not make the outer one work the same way?

%macro inner(x);
  &x._log &x._exp &x._10
%mend;

%macro outer(list);
%local i;
%do i=1 %to %sysfunc(countw(&list));
 %inner(%scan(&list,&i))
%end;
%mend outer;

%let want=%outer(X y Z);