Grammar Interprets by command-line arguments using this Grammar . L Lexicon - class gi. This class implements a Lexicon . Concatenation - class gi. This class implements an Expression denoting the concatenation of two regular languages.
Concatenation Constructs an Expression denoting the concatenation of two regular languages.
Exception - exception gi. This class implements an Exception . Exception Constructs an Exception with a message. Match - class gi. This class implements an Expression denoting the set of characters in a string.