void TokenFactor(out Graph g)
{
string name; int kind;
g = null;
if (la.kind == 1 || la.kind == 3 || la.kind == 5)
{
Sym(out name, out kind);
if (kind == id)
{
CharClass c = tab.FindCharClass(name);
if (c == null)
{
SemErr("undefined name");
c = tab.NewCharClass(name, new CharSet());
}
Node p = tab.NewNode(Node.clas, null, 0); p.val = c.n;
g = new Graph(p);
tokenString = noString;
}
else // str
{
g = tab.StrToGraph(name);
if (tokenString == null)
{
tokenString = name;
}
else
{
tokenString = noString;
}
}
}
else if (la.kind == 30)
{
Get();
TokenExpr(out g);
Expect(31);
}
else if (la.kind == 32)
{
Get();
TokenExpr(out g);
Expect(33);
tab.MakeOption(g); tokenString = noString;
}
else if (la.kind == 34)
{
Get();
TokenExpr(out g);
Expect(35);
tab.MakeIteration(g); tokenString = noString;
}
else
{
SynErr(51);
}
if (g == null) // invalid start of TokenFactor
{
g = new Graph(tab.NewNode(Node.eps, null, 0));
}
}