The Preprocessing Unit Component
This component is in charge of processing the .asr files, gathering together the code for the preprocessing unit of the current module. The preprocessing unit is the code of the current module together with the set of assertions/properties which allows a precise interpretation of the assertions present for the current module. It serves the rest of the precompiler current module clauses, assertions, (definitions of) properties related, and characteristics of the current module predicates (e.g.: initialization directives, whether a predicate is a meta-predicate, whether it is a "builtin", etc.).