SAS: Issues with creating macro variables within a parameterized macro?

Issues with creating macro variables within a parameterized macro?


See also http://support.sas.com/documentation/cdl/en/mcrolref/61885/HTML/default/viewer.htm#tw3514-symput.htm



SOURCE CODE FOLLOWS:

%macro with_args(x=);

     data _null_;

     call symputx("macvar1", "1");

     run;

     %put In &=macvar1;

     data _null_;

     var = "&macvar1";

     put var=;

     run;

%mend with_args;

%macro no_args;

     data _null_;

     call symputx("macvar2", "2");

     run;

     %put In &=macvar2;

     data _null_;

     var = "&macvar2";

     put var=;

     run;

%mend no_args;

%with_args(x=junk);

%no_args;

%put Out &=macvar1;

%put Out &=macvar2;

LOG FOLLOWS:

MLOGIC(WITH_ARGS):  Beginning execution.

MLOGIC(WITH_ARGS):  Parameter X has value junk

MPRINT(WITH_ARGS):   data _null_;

MPRINT(WITH_ARGS):   call symputx("macvar1", "1");

MPRINT(WITH_ARGS):   run;

NOTE: DATA statement used (Total process time):

      real time           0.00 seconds

      cpu time            0.00 seconds

     

MLOGIC(WITH_ARGS):  %PUT In &=macvar1

SYMBOLGEN:  Macro variable MACVAR1 resolves to 1

In MACVAR1=1

MPRINT(WITH_ARGS):   data _null_;

SYMBOLGEN:  Macro variable MACVAR1 resolves to 1

MPRINT(WITH_ARGS):   var = "1";

MPRINT(WITH_ARGS):   put var=;

MPRINT(WITH_ARGS):   run;

VAR=1

NOTE: DATA statement used (Total process time):

      real time           0.00 seconds

      cpu time            0.00 seconds

     

MLOGIC(WITH_ARGS):  Ending execution.

MLOGIC(NO_ARGS):  Beginning execution.

MPRINT(NO_ARGS):   data _null_;

MPRINT(NO_ARGS):   call symputx("macvar2", "2");

MPRINT(NO_ARGS):   run;

NOTE: DATA statement used (Total process time):

      real time           0.00 seconds

      cpu time            0.00 seconds

     

MLOGIC(NO_ARGS):  %PUT In &=macvar2

SYMBOLGEN:  Macro variable MACVAR2 resolves to 2

In MACVAR2=2

MPRINT(NO_ARGS):   data _null_;

SYMBOLGEN:  Macro variable MACVAR2 resolves to 2

MPRINT(NO_ARGS):   var = "2";

MPRINT(NO_ARGS):   put var=;

MPRINT(NO_ARGS):   run;

VAR=2

NOTE: DATA statement used (Total process time):

      real time           0.00 seconds

      cpu time            0.00 seconds

     

MLOGIC(NO_ARGS):  Ending execution.

WARNING: Apparent symbolic reference MACVAR1 not resolved.

Out macvar1

SYMBOLGEN:  Macro variable MACVAR2 resolves to 2

Out MACVAR2=2