After selecting a rust parser generator from https://docs.rs/peg/latest/peg/, and generating rules based on determined production rules,

Could I get an example of a rust program that uses the parser just generated to validate the given set of rules, as well as invalid versions of the rules (at least twice as many as the given set) and any additional rules you may desire to test.

Please, I need help understanding how to do this and not an answer copied from the Internet. Thank you.