||Implements a basic expression calculator using lexer and parser combinators.
Can handle + - * / ^ () operators. Run with the --help switch for more info.
||Implements the sentence grammar used as an example in the reference paper on pages 2-3.
||Implements the highly ambiguous s grammar used in the reference paper on pages 5 and 12-13.
Length of input can be adjusted by command line argument and is therefore good for experiments on
complexity of the library. Also responds to the --help switch.