@Override
public Token produce(final T reader, final P productionStack, final B builder) {
for (; ; ) {
final Token token = reader.peek();
if (token == null || token == EndOfStreamToken.EOS) {
return EndOfStreamToken.EOS;
} else if (token.type().isWhitespace()) {
reader.next(); // Discard Whitespace
} else {
this.p.produce(reader, productionStack, builder);
return null;
}
}
}
