MAP: A Pascal Macro Preprocessor for Large Program Development

The programming language Pascal waH originally designed for tcaching introductory programming, currently, however, production systems use it as the primary implementation language. This paper describes extensions of Pascal intended to aid the large program developer. The extensions are implemented in a macro preprocessor MAP, which supports constant expression evaluation, source file inclusion, conditional compilation, and macro substitution. While each of these features can be used independently, they are all implemented with a simple, uniform syntax. Furthermore, in keeping wi th the spirit of Pascal, an attempt has been made to make the facilities straightforward and simple. ~he design and implementation details arc discussed.