feat(*): recreate library as scoped package

base/mf_existds.sas

@@ -0,0 +1,26 @@
+/**
+  @file mf_existds.sas
+  @brief Checks whether a dataset OR a view exists.
+  @details Can be used in open code, eg as follows:
+
+      %if %mf_existds(libds=work.someview) %then %put  yes it does!;
+
+  NOTE - some databases have case sensitive tables, for instance POSTGRES
+    with the preserve_tab_names=yes libname setting.  This may impact
+    expected results (depending on whether you 'expect' the result to be
+    case insensitive in this context!)
+
+  @param libds library.dataset
+  @return output returns 1 or 0
+  @warning Untested on tables registered in metadata but not physically present
+  @version 9.2
+  @author Allan Bowe
+**/
+
+%macro mf_existds(libds
+)/*/STORE SOURCE*/;
+
+  %if %sysfunc(exist(&libds)) ne 1 & %sysfunc(exist(&libds,VIEW)) ne 1 %then 0;
+  %else 1;
+
+%mend;