@NotNull
@Override
public Pair<R2, State> parse(@NotNull List<Token<T>> tokens, @NotNull State state)
throws ParserException {
final Pair<R, State> result = myParser.parse(tokens, state);
return Pair.create(myFunction.fun(result.getFirst()), result.getSecond());
}
@NotNull
@Override
public Pair<R, State> parse(@NotNull List<Token<T>> tokens, @NotNull State state)
throws ParserException {
try {
return myFirst.parse(tokens, state);
} catch (ParserException e) {
return mySecond.parse(tokens, new State(state, state.getPos(), e.getState().getMax()));
}
}
@NotNull
@Override
public FunctionalParser<R, T> endOfInput() {
return this.thenSkip(FunctionalParserBase.<T>finished());
}
@NotNull
public static <R, T> FunctionalParser<R, T> maybe(@NotNull final FunctionalParser<R, T> parser) {
return parser.or(FunctionalParserBase.<R, T>pure(null));
}