public override Connective Copy()
{
ConnectiveFunction cf = new ConnectiveFunction();
cf.SetFunctionChar(functionChar);
foreach (char c in localArguments)
{
cf.AddArgument(c);
}
return(cf);
}
private static Connective readPropositionStringRec()
{
Connective Head = null;
int index = 0;
while (PropositionList.Count != 0)
{
switch (PropositionList[0])
{
case ',':
//ERROR CHECKING
if (index == 0)
{
throw new Exception("',' has not been placed between '(' and ')'");
}
if (Head != null)
{
if (Head is ConnectiveNot || Head is ConnectiveArgument)
{
throw new Exception("'" + Head.GetLocalString() + "' does not need more than 2 parameters");
}
if (Head is ConnectiveOne)
{
if (((ConnectiveOne)Head).Con1 == null)
{
throw new Exception("'" + Head.GetLocalString() + "' is missing a left connective");
}
}
if (Head is ConnectiveFunction)
{
if (((ConnectiveFunction)Head).LocalArguments.Count != index)
{
throw new Exception("'" + Head.GetLocalString() + "' is missing a parameter");
}
}
}
else
{
throw new Exception("',' does not belong to any connective");
}
//SET INDEX
index++;
PropositionList.RemoveAt(0);
break;
case '(':
//ERROR CHECKING
if (Head == null)
{
throw new Exception("'(' does not belong to any connective");
}
if (Head is ConnectiveArgument)
{
throw new Exception("'" + Head.GetLocalString() + "' cannot have any parameters");
}
//SET INDEX
index = 1;
PropositionList.RemoveAt(0);
break;
case ')':
//ERROR CHECKING
if (index == 1)
{
if (Head is ConnectiveArgument)
{
throw new Exception("'" + Head.GetLocalString() + "' cannot have any parameters");
}
if (Head is ConnectiveOne)
{
if (((ConnectiveOne)Head).Con1 == null)
{
throw new Exception("'" + Head.GetLocalString() + "' is missing a left connective");
}
}
if (Head is ConnectiveFunction)
{
if (((ConnectiveFunction)Head).LocalArguments.Count == 0)
{
throw new Exception("Function '" + Head.GetLocalString() + "' is missing parameters");
}
}
}
else if (index == 2)
{
if (Head is ConnectiveNot || Head is ConnectiveArgument)
{
throw new Exception("'" + Head.GetLocalString() + "' cannot have 2 paramters, only 1");
}
if (Head is ConnectiveTwo)
{
if (((ConnectiveTwo)Head).Con2 == null)
{
throw new Exception("'" + Head.GetLocalString() + "' is missing a right connective");
}
}
}
PropositionList.RemoveAt(0);
return(Head);
default:
if (ConnectiveTypes.Contains(PropositionList[0])) //type found
{
Connective con;
switch (index)
{
case 0:
if (Head == null)
{
con = getConnectiveByType(PropositionList[0]);
Head = con;
if (Head is ConnectiveQuantifier)
{
if (PropositionList.Count >= 3)
{
ConnectiveQuantifier cq = (ConnectiveQuantifier)Head;
if (SmallArguments.Contains(PropositionList[1]))
{
cq.SetArgument(PropositionList[1]);
PropositionList.RemoveAt(0); //removes @/!
PropositionList.RemoveAt(0); //removes local argument
}
else
{
throw new Exception("Invalid local variable '" + PropositionList[1] + "' for quantifier: " + PropositionList[0]);
}
}
else
{
throw new Exception("Unfinished quantifier: " + PropositionList[0]);
}
}
PropositionList.RemoveAt(0); //removes type or .
}
else
{
throw new Exception("'" + PropositionList[0] + "' cannot be placed after another connective");
}
break;
case 1:
if (Head != null)
{
if (!(Head is ConnectiveArgument || Head is ConnectiveFunction))
{
con = readPropositionStringRec();
((ConnectiveOne)Head).setLeftConnective(con);
}
else
{
throw new Exception("'" + Head.GetLocalString() + "' does not need any connectives as parameters");
}
}
else
{
throw new Exception("Internal index problem occured (index = 1, Head = null)");
}
break;
case 2:
if (Head != null)
{
if (Head is ConnectiveTwo)
{
con = readPropositionStringRec();
((ConnectiveTwo)Head).setRightConnective(con);
}
else
{
throw new Exception("'" + Head.GetLocalString() + "' cannot have a second parameter");
}
}
else
{
throw new Exception("Internal index problem occured (index = 2, Head = null)");
}
break;
default:
throw new Exception("Internal index problem occured (index > 2 & head != function)");
}
}
else if (Arguments.Contains(PropositionList[0])) //argument found
{
Connective con;
con = new ConnectiveArgument(PropositionList[0]);
if (PropositionList.Count > 1)
{
if (PropositionList[1] == '(')
{
con = new ConnectiveFunction();
((ConnectiveFunction)con).SetFunctionChar(PropositionList[0]);
}
}
switch (index)
{
case 0:
if (Head == null)
{
PropositionList.RemoveAt(0);
Head = con;
}
else
{
throw new Exception("'" + PropositionList[0] + "' cannot be placed after another connective");
}
break;
case 1:
if (Head != null)
{
if (!(Head is ConnectiveArgument || Head is ConnectiveFunction))
{
if (con is ConnectiveFunction)
{
con = readPropositionStringRec();
}
else
{
PropositionList.RemoveAt(0);
}
((ConnectiveOne)Head).setLeftConnective(con);
}
else
{
throw new Exception("'" + Head.GetLocalString() + "' cannot have Argument as parameter");
}
}
else
{
throw new Exception("Internal index problem occured (index = 1, Head = null)");
}
break;
case 2:
if (Head != null)
{
if (!(Head is ConnectiveArgument || Head is ConnectiveFunction))
{
if (con is ConnectiveFunction)
{
con = readPropositionStringRec();
}
else
{
PropositionList.RemoveAt(0);
}
((ConnectiveTwo)Head).setRightConnective(con);
}
else
{
throw new Exception("'" + Head.GetLocalString() + "' cannot have Argument as parameter");
}
}
else
{
throw new Exception("Internal index problem occured (index = 2, Head = null)");
}
break;
default:
throw new Exception("Internal index problem occured (index > 2 & Head != Function)");
}
}
else if (SmallArguments.Contains(PropositionList[0]))
{
if (Head != null)
{
if (Head is ConnectiveFunction)
{
ConnectiveFunction cf = (ConnectiveFunction)Head;
cf.AddArgument(PropositionList[0]);
PropositionList.RemoveAt(0);
}
else
{
throw new Exception("Local Argument found outside Function/Quantifier: " + PropositionList[0]);
}
}
else
{
throw new Exception("Local Argument found outside Function/Quantifier: " + PropositionList[0]);
}
}
else if (PropositionList[0] != ' ') //UNKNOWN (no space)
{
throw new Exception("Unknown character found, char: '" + PropositionList[0] + "'. Please remove it!");
}
else //SPACE
{
PropositionList.RemoveAt(0);
}
break;
}
}
//Final check for main connective
if (Head != null)
{
if (!(Head is ConnectiveArgument || Head is ConnectiveFunction))
{
if (Head is ConnectiveNot || Head is ConnectiveQuantifier)
{
if (((ConnectiveOne)Head).Con1 == null)
{
throw new Exception("'" + Head.GetLocalString() + "' is missing a left connective");
}
}
else
{
if (((ConnectiveTwo)Head).Con1 == null)
{
throw new Exception("'" + Head.GetLocalString() + "' is missing a left connective");
}
if (((ConnectiveTwo)Head).Con2 == null)
{
throw new Exception("'" + Head.GetLocalString() + "' is missing a right connective");
}
}
}
}
return(Head);
}