void SimSet(out CharSet s)
{
int n1, n2;
s = new CharSet();
if (la.kind == 1)
{
Get();
CharClass c = tab.FindCharClass(t.val);
if (c == null)
{
SemErr("undefined name");
}
else
{
s.Or(c.set);
}
}
else if (la.kind == 3)
{
Get();
string name = t.val;
name = tab.Unescape(name.Substring(1, name.Length - 2));
foreach (char ch in name)
{
if (dfa.ignoreCase)
{
s.Set(char.ToLower(ch));
}
else
{
s.Set(ch);
}
}
}
else if (la.kind == 5)
{
Char(out n1);
s.Set(n1);
if (la.kind == 22)
{
Get();
Char(out n2);
for (int i = n1; i <= n2; i++)
{
s.Set(i);
}
}
}
else if (la.kind == 23)
{
Get();
s = new CharSet(); s.Fill();
}
else
{
SynErr(46);
}
}
// match string against current automaton; store it either as a fixedToken or as a litToken
public void MatchLiteral(string s, Symbol sym)
{
s = tab.Unescape(s.Substring(1, s.Length - 2));
int i, len = s.Length;
State state = firstState;
Action a = null;
for (i = 0; i < len; i++) // try to match s against existing DFA
{
a = FindAction(state, s[i]);
if (a == null)
{
break;
}
state = a.target.state;
}
// if s was not totally consumed or leads to a non-final state => make new DFA from it
if (i != len || state.endOf == null)
{
state = firstState; i = 0; a = null;
dirtyDFA = true;
}
for (; i < len; i++) // make new DFA for s[i..len-1], ML: i is either 0 or len
{
State to = NewState();
NewTransition(state, to, Node.chr, s[i], Node.normalTrans);
state = to;
}
Symbol matchedSym = state.endOf;
if (state.endOf == null)
{
state.endOf = sym;
}
else if (matchedSym.tokenKind == Symbol.fixedToken || (a != null && a.tc == Node.contextTrans))
{
// s matched a token with a fixed definition or a token with an appendix that will be cut off
parser.SemErr("tokens " + sym.name + " and " + matchedSym.name + " cannot be distinguished");
}
else // matchedSym == classToken || classLitToken
{
matchedSym.tokenKind = Symbol.classLitToken;
sym.tokenKind = Symbol.litToken;
}
}