public override bool CreateNonTerminal(Lexer lex, ProductionStorage ps)
{
Mex1 m1;
if (ps.MatchProduction<Mex1>(out m1))
{
result = m1;
//( operator mex-1 | operand * operator KUhE? ) *
while (true)
{
Operator op;
Mex1 m12;
List<NonTerminal> o = new List<NonTerminal>();
//( operator mex1 )
int save = lex.Position;
if (ps.MatchProduction<Operator>(out op) && ps.MatchProduction<Mex1>(out m12))
{
//if we're done this, then we have the whole bracket.
//turn it into an infix
result = new Infix(result, op, m12);
}
//(operand * operator KUhE?)
else
{
//undo any damage from the first bit
lex.Seek(save);
//put the leading mex1 into the operand list
o.Add(m1);
//operand *
while (true)
{
Operand oper;
if(ps.MatchProduction<Operand>(out oper))
o.Add(oper);
else
break;
}
//operator
if (ps.MatchProduction<Operator>(out op))
{
result = new RP(o, op);
}
else
{
lex.Seek(save);
break; // havent matched an infix or an rp
}
ps.MatchProduction(Selmaho.KUhE);
}
}
return true;
}
else
return false; //you have to match a Mex1 first
}
public Infix(NonTerminal left, Operator op, NonTerminal right)
{
_operator = op;
_args.Add(left);
_args.Add(right);
}