static void SimSet(out BitArray s)
{
int n1, n2;
s = new BitArray(CharClass.charSetSize);
if (la.kind == 1)
{
Get();
CharClass c = CharClass.Find(t.val);
if (c == null)
{
SemErr("undefined name");
}
else
{
s.Or(c.set);
}
}
else if (la.kind == 3)
{
Get();
string name = t.val;
name = DFA.Unescape(name.Substring(1, name.Length - 2));
foreach (char ch in name)
{
s[ch] = true;
}
}
else if (la.kind == 5)
{
Char(out n1);
s[n1] = true;
if (la.kind == 22)
{
Get();
Char(out n2);
for (int i = n1; i <= n2; i++)
{
s[i] = true;
}
}
}
else if (la.kind == 23)
{
Get();
s = new BitArray(CharClass.charSetSize, true);
s[0] = false;
}
else
{
SynErr(49);
}
}
static void TokenFactor(out Graph g)
{
string name;
int kind;
g = new Graph();
if (la.kind == 1 || la.kind == 3 || la.kind == 5)
{
Sym(out name, out kind);
if (kind == id)
{
CharClass c = CharClass.Find(name);
if (c == null)
{
SemErr("undefined name");
c = new CharClass(name, new BitArray(CharClass.charSetSize));
}
Node p = new Node(Node.clas, null, 0);
p.val = c.n;
g = new Graph(p);
}
else
{
g = Graph.StrToGraph(name); // str
}
}
else if (la.kind == 28)
{
Get();
TokenExpr(out g);
Expect(29);
}
else if (la.kind == 30)
{
Get();
TokenExpr(out g);
Expect(31);
Graph.MakeOption(g);
}
else if (la.kind == 32)
{
Get();
TokenExpr(out g);
Expect(33);
Graph.MakeIteration(g);
}
else
{
SynErr(54);
}
}
public void ShiftWith(BitArray s)
{
if (Sets.Elements(s) == 1)
{
typ = Node.chr; sym = Sets.First(s);
}
else
{
CharClass c = CharClass.Find(s);
if (c == null)
{
c = new CharClass("#", s); // class with dummy name
}
typ = Node.clas; sym = c.n;
}
}
static void SetDecl()
{
BitArray s;
Expect(1);
string name = t.val;
CharClass c = CharClass.Find(name);
if (c != null)
{
SemErr("name declared twice");
}
Expect(8);
Set(out s);
if (Sets.Elements(s) == 0)
{
SemErr("character set must not be empty");
}
c = new CharClass(name, s);
Expect(9);
}