public override Nfa GenerateNfa(bool ignoreCase) {
if (units.Count == 1)
return units[0].GenerateNfa(ignoreCase);
Nfa retVal = new Nfa();
NfaState startState = retVal.Start;
NfaState finalState = retVal.End;
Nfa temp1;
Nfa temp2 = null;
RegularExpression curRE;
curRE = units[0];
temp1 = curRE.GenerateNfa(ignoreCase);
startState.AddMove(temp1.Start);
for (int i = 1; i < units.Count; i++) {
curRE = units[i];
temp2 = curRE.GenerateNfa(ignoreCase);
temp1.End.AddMove(temp2.Start);
temp1 = temp2;
}
temp2.End.AddMove(finalState);
return retVal;
}
public override Nfa GenerateNfa(bool ignoreCase) {
Nfa retVal = new Nfa();
NfaState startState = retVal.Start;
NfaState finalState = retVal.End;
Nfa temp = RegularExpression.GenerateNfa(ignoreCase);
startState.AddMove(temp.Start);
temp.End.AddMove(temp.Start);
temp.End.AddMove(finalState);
return retVal;
}
public override Nfa GenerateNfa(bool ignoreCase)
{
CompressCharLists();
if (choices.Count == 1)
return choices[0].GenerateNfa(ignoreCase);
Nfa retVal = new Nfa();
NfaState startState = retVal.Start;
NfaState finalState = retVal.End;
for (int i = 0; i < choices.Count; i++) {
Nfa temp;
RegularExpression curRE = choices[i];
temp = curRE.GenerateNfa(ignoreCase);
startState.AddMove(temp.Start);
temp.End.AddMove(finalState);
}
return retVal;
}
public override Nfa GenerateNfa(bool ignoreCase)
{
if (!transformed) {
if (Options.getIgnoreCase() || ignoreCase) {
ToCaseNeutral();
SortDescriptors();
}
if (Negated)
RemoveNegation(); // This also sorts the list
else
SortDescriptors();
}
if (descriptors.Count == 0 && !Negated) {
CSharpCCErrors.SemanticError(this, "Empty character set is not allowed as it will not match any character.");
return new Nfa();
}
transformed = true;
Nfa retVal = new Nfa();
NfaState startState = retVal.Start;
NfaState finalState = retVal.End;
int i;
for (i = 0; i < descriptors.Count; i++) {
if (descriptors[i] is SingleCharacter)
startState.AddChar(((SingleCharacter) descriptors[i]).Character);
else // if (descriptors.get(i) instanceof CharacterRange)
{
CharacterRange cr = (CharacterRange) descriptors[i];
if (cr.Left == cr.Right)
startState.AddChar(cr.Left);
else
startState.AddRange(cr.Left, cr.Right);
}
}
startState.next = finalState;
return retVal;
}
