parse method
Implementation
@override
@inline
Tuple1<O>? parse(ParseInput<I> input, ParseState state) {
final r1 = p1.parse(input, state);
if (r1 != null) {
return r1;
}
final r2 = p2.parse(input, state);
if (r2 != null) {
return r2;
}
final r3 = p3.parse(input, state);
if (r3 != null) {
return r3;
}
}