private Maybe <ILineNode> ParsePreprocessor(MergeableGenerator <Token> tokens, ImmutableStack <Closure> scopes)
{
head = tokens.Current;
tokens.MoveNext();
//Note: Not a ParseParamList because no commas.
IList <IParamNode> paramList = ParsePreprocParamList(tokens, scopes);
Maybe <ILineNode> retVal = directiveHandler.HandleDirective(this, head, paramList, tokens);
if (!retVal.IsNothing)
{
CheckDataWrite(retVal.FromJust.Size);
CurrentOffset += retVal.FromJust.Size;
}
return(retVal);
}