Module choice

Combinators which take one or more parsers and attempts to parse successfully with at least one of them.

Structs

• Choice
• Optional
• Or

Traits

• ChoiceParser
  ChoiceParser represents a parser which may parse one of several different choices depending on the input.

Functions

• choice
  Takes a tuple, a slice or an array of parsers and tries to apply them each in order. Fails if all the parsers fails or if an applied parser consumes input before failing.
• optional
  Parses parser and outputs Some(value) if it succeeds, None if it fails without consuming any input. Fails if parser fails after having committed some input.
• or
  Equivalent to p1.or(p2).