This library provides predicates for running FASILL directives.
FASILL directives are annotations inserted in FASILL source files for the compiler.
This predicate succeeds when Indicator is the indicator of a directive of FASILL. An indicator is a term of the form Name/Arity, where Name is an atom and Arity is a non-negative integer.
This predicate succeeds when Directive is a valid FASILL directive and it can be executed.