public CharacterSetBuild Evaluate()
{
switch (this.m_Type)
{
case SetType.Chars:
return(this.m_Characters);
case SetType.Name:
{
CharacterSetBuild characterSet = (CharacterSetBuild)BuilderApp.GetCharacterSet(this.m_Text);
if (characterSet != null)
{
return(new CharacterSetBuild(characterSet));
}
BuilderApp.Log.Add(SysLogSection.Grammar, SysLogAlert.Critical, "Character set is not defined", "The character set {" + this.m_Text + "} was not defined in the grammar.", "");
return(new CharacterSetBuild());
}
}
return(new CharacterSetBuild());
}
private static AutomataType CreateAutomataItem(RegExpItem Item)
{
AutomataType type;
int head;
int num3;
int num4;
int tail;
if (Item.Data is RegExp)
{
RegExpItem item2 = Item;
RegExp data = (RegExp)item2.Data;
item2.Data = data;
AutomataType type3 = CreateSubAutomata(data);
head = type3.Head;
tail = type3.Tail;
num3 = head;
num4 = tail;
}
else if (!(Item.Data is SetItem))
{
BuilderApp.Log.Add(SysLogSection.Grammar, SysLogAlert.Critical, "Invalid internal token at CreateAutomataItem(): " + Versioned.TypeName(RuntimeHelpers.GetObjectValue(Item.Data)));
}
else
{
CharacterSetBuild characters;
SetItem item = (SetItem)Item.Data;
switch (item.Type)
{
case SetItem.SetType.Chars:
characters = (CharacterSetBuild)item.Characters;
head = AddState();
tail = AddState();
NFA[head].AddEdge(characters, tail);
num3 = head;
num4 = tail;
break;
case SetItem.SetType.Name:
characters = (CharacterSetBuild)BuilderApp.GetCharacterSet(item.Text);
if (characters == null)
{
BuilderApp.Log.Add(SysLogSection.Grammar, SysLogAlert.Critical, "Unknown user-defined set: {" + item.Text + "}");
break;
}
tail = AddState();
head = AddState();
NFA[head].AddEdge(characters, tail);
num3 = head;
num4 = tail;
break;
case SetItem.SetType.Sequence:
{
int num6;
head = AddState();
tail = head;
string text = item.Text;
short num7 = (short)(text.Length - 1);
for (short i = 0; i <= num7; i = (short)(i + 1))
{
num6 = tail;
tail = AddState();
NFA[num6].AddEdge(new CharacterSetBuild(Conversions.ToString(text[i])), tail);
}
num3 = num6;
num4 = tail;
break;
}
default:
BuilderApp.Log.Add(SysLogSection.Grammar, SysLogAlert.Critical, "Invalid internal token at CreateAutomataItem(): " + Versioned.TypeName(RuntimeHelpers.GetObjectValue(Item.Data)));
break;
}
}
if ((num3 == 0) | (num4 == 0))
{
Debug.WriteLine("ERROR: BAD KLEENE DATA");
}
switch (Item.Kleene)
{
case "*":
NFA[num3].AddLambdaEdge(num4);
NFA[num4].AddLambdaEdge(num3);
break;
case "+":
NFA[num4].AddLambdaEdge(num3);
break;
case "?":
NFA[num3].AddLambdaEdge(num4);
break;
}
type.Head = (short)head;
type.Tail = (short)tail;
return(type);
}