MACRO REFERENCING ENVIRONMENTS

Transcription

1 MACRO REFERENCING ENVIRONMENTS Sandra Hendren, Independent Consultant Here are some examp~es showing g~obal and local macro variables w~th the same names that are in effect at the same time. Using same-named variables is not recommended! I only use it as a teaching tool, as a fun way to show multiple environments, with the same variable names and different values in effect. There are two macro variable names, HERNAME and HISNAME, but more than two macro variables, as shown. Global values always begin with a "G" - Grace and Greg. Local values begin with an o if assigned in the local macro named ONE (Olivia and Owen>; begin with a "T" if assigned in the local macro named TWO <Tracy and Tim>. 98

2 EDIT---- HDI.TSAN.DEV.CNTL<MACR0> ~MACRO ~LET ~LET ~PUT ~PUT ONE; ~MEND ONE; HERNAME = HISNAME = ~STR< >; &HER NAME OLIVIA; OWEN; ~LET HERNAME GRACE; ~LET HISNAME = GREG; ~PUT IN GLOBAL ~ONE; &HERNAME COLUMNS ENVIRONMENT GLOBAL NAMES ARE SCROLL ===> HALF ENVIRONMENT BEFORE CALLING MACRO ONE GLOBAL NAMES ARE ~PUT IN GLOBAL ENVIRONMENT AFTER CALLING MACRO ONE GLOBAL NAMES ARE BROWSE - FTF00 SAS SAS PAGE 4-- LINE 8-- COLS 80 NOTE: SAS OPTIONS SPECIFIED ARE: MACRO SORT= IN GLOBAL ENVIRONMENT BEFORE CALLING MACRO ONE GLOBAL NAMES ARE ENVIRONMENT GLOBAL NAMES ARE IN GLOBAL ENVIRONMENT AFTER CALLING MACRO ONE GLOBAL NAMES ARE CARY, N.C

3 EDIT---- HDI.THEN.DEV.CNTL<MACR05) COLUMNS SCROLL ===> HALF ~MACRO ONE<HERNAME,HISNAME>; ~PUT ~MEND ONE; &HER NAME ~LET HERNAME = BRACE; ~LET HISNAME = BREB; ENVIRONMENT LOCAL NAMES ARE ~PUT IN GLOBAL ENVIRONMENT BEFORE CALLING MACRO ONE GLOBAL NAMES ARE ~ONE<OLIVIA,OWEN>; ~PUT IN GLOBAL ENVIRONMENT AFTER CALLING MACRO ONE GLOBAL NAMES ARE BROWSE - FTF00 SAS SAS NOTE: SAS OPTIONS SPECIFIED ARE: MACRO SORT=4 PAGE 4-- LINE 8-- COLS 80 IN GLOBAL BRACE ENVIRONMENT BEFORE CALLING AND BREB MACRO ONE GLOBAL NAMES ARE OLIVIA ENVIRONMENT LOCAL NAMES ARE AND OWEN IN GLOBAL ENVIRONMENT AFTER CALLING MACRO ONE GLOBAL NAMES ARE BRACE AND BREB CARY, N.C

4 EDIT---- HDI.THEN.DEV.CNTL<MACR06) "MACRO "LET "LET "MEND ONE; ONE<HERNAME,HISNAME>; "STR< >; ENVIRONMENT, LOCAL NAMES ARE HERNAME = OLIVIA; HISNAME = OWEN; "STR ( >; &HER NAME "ONE<PAM,PAUL>; COLUMNS SCROLL ===> HALF ENVIRONMENT, LOCAL NAMES ARE "STR< >; IN SLOBAL ENVIRONMENT AFTER CALLINS MACRO ONE SLOBAL NAMES ARE BROWSE - FTF00 SAS PAM OLIVIA 8 SAS ENVIRONMENT, LOCAL NAMES AND PAUL ENVIRONMENT, LOCAL NAMES AND OWEN &HERNAME AND ARE ARE PASE &HISNAME; IN SLOBAL ENVIRONMENT AFTER CALLING MACRO ONE &HER NAME AND &HISNAME -- LINE SLOBAL NAMES WARNINS : APPARENT SYMBOLIC REFERENCE NOT RESOLVED. ARE -- COLS 80 0

5 EDIT---- HDI.THEN.DEV.CNTL(MACR04> COLUMNS SCROLL ===> HALF ~MACRO ONE<HERNAME,HISNAME>; ~PUT ENVIRONMENT, LOCAL NAMES ARE ~LET HERNAME = OLIVIA; ~LET HISNAME = OWEN; ~PUT &HERNAME ~MEND ONE; ~PUT HERNAME = HISNAME = ~STR< >; IN GLOBAL &HERNAME ENVIRONMENT, LOCAL NAMES ARE GRACE; GREG; ~ONE<&HERNAME,&HISNAME>; ~PUT ~STR( >; ENVIRONMENT BEFORE CALLING MACRO ONE GLOBAL NAMES ARE ~PUT IN GLOBAL ENVIRONMENT AFTER CALLING MACRO ONE GLOBAL NAMES ARE BROWSE - FTF00 SAS SAS PAGE -- LINE -- COLS 80 IN GLOBAL ENVIRONMENT BEFORE CALLING MACRO ONE GLOBAL NAMES ARE ENVIRONMENT, LOCAL NAMES ARE ENVIRONMENT, LOCAL NAMES ARE IN GLOBAL ENVIRONMENT AFTER CALLING MACRO ONE GLOBAL NAMES ARE CARY, N.C

6 XMACRO ONE<HERNAME,HISNAME>; XPUT Y.STR ( ) ; XPUT MACRO ONE BEFORE CALLING MACRO TWO LOCAL NAMES ARE XTWO<TRACY,TIM>; XPUT XSTR< l; XPUT MACRO ONE AFTER CALLING MACRO TWO LOCAL NAMES ARE Y.MEND ONE; Y.MACRO TWO<HERNAME,HISNAMEl; XPUT XSTR < l ; XPUT MACRO TWO BEFORE ASSIGNMENT LOCAL NAMES ARE Y.PUT XSTR < l ; Y.MEND TWO; Y.LET HERNAME = GRACE; Y.LET HISNAME = GREG; XONE<OLIVIA,OWENl; Y.PUT Y.STR ( l ; XPUT IN GLOBAL ENVIROMENT GLOBAL NAMES ARE 03

7 BROWSE - FTllFOOl SAS COMMAND ===) SAS PAGE 4-- LINE -- COLS 80 MACRO ONE BEFORE CALLING MACRO TWO LOCAL NAMES ARE MACRO TWO BEFORE ASSIGNMENT LOCAL NAMES ARE TRACY AND TIM MACRO ONE AFTER CALLING MACRO TWO LOCAL NAMES ARE IN GLOBAL ENVIROMENT GLOBAL NAMES ARE CARY, N.C