set-expression-parser

PEG parser that parses set expressions. It recognizes the set operations union (|), intersection (&) and difference (-).

Example

Given the sets

fruits = [apple, orange, strawberry]
sweets = [chocolate, liquorice]
deliciousness = [strawberry, chocolate, whipped cream]

and the expression (fruits | sweets) & deliciousness the resulting set is [strawberry, chocolate].