ParseState

public final class ParseState<Token>

Represents the state of the parser. Stores the generator from which the subsequent symbols to parse are obtained.

  • Construct a ParseState from a forkable sequence. Provided as an optimization.

    Declaration

    Swift

    public convenience init<Sequence: SequenceType where Sequence.Generator: ForkableGeneratorType, Sequence.Generator.Element == Token>(_ sequence: Sequence)

  • Returns the next token from the generator, otherwise throws a ParseError if no more tokens are availible.

    Declaration

    Swift

    public func read() throws -> Token

  • Save the current ParseState for later restoration.

    Declaration

    Swift

    @warn_unused_result public func checkpoint() -> ParseStateCheckpoint<Token>

  • Restore the ParseState to what is was when checkpoint was created.

    Declaration

    Swift

    public func restore(checkpoint: ParseStateCheckpoint<Token>)