Comments are requested as to what features should be in a "standard" PL/I Preprocessor.
Statements:
%DO - Implementations seem split between supporting only a simple nonitrative %DO to group statements and the newer IBM compilers that support the complete PL/I DO-statement syntax. A good compromise would seem to be to allow the Type-3 iterative %DO with a single iterative specification using a FIXED control variable only, as in PL/I(F).
Builtins: