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);
}