Throughout these high-level examples, A and B can be thought of as placeholders for a character class (e.g. [a-z]) or a property escape (e.g. \p {ASCII}) and maybe (subject to discussion of specifics) ...

Simple, this program is a parser implemented using Flex and Bison that validates the syntactic correctness of Fuzzy Set Notation strings passed in. After you run the program it will halt for an input ...

Set notation is used in mathematics to essentially list numbers, objects or outcomes. This is read as 'Z is a set of the factors of 18'. This set could also be defined by us saying: Z = {1, 2, 3, 6, 9 ...