/*************************************************************
** Function : insert **
** Inputs : lex, token, and depth **
** Return : void **
**************************************************************
** Description : Inserts the lexeme, token and depth into a **
** record in the symbol table. **
**************************************************************/
public void insert(string lex, Vari.Symbol Token, int depth)
{
int x = hash(lex);
EntryNode entry = new EntryNode();
entry.lexeme = lex;
entry.token = Token;
entry.depth = depth;
entry.type = Vari.entryType;
if (theSymbolTable[x].Count != 0)
{
theSymbolTable[x].Insert(0, entry);
}
else
{
theSymbolTable[x].Add(entry);
}
}
/*************************************************************
** Function : Match **
** Inputs : Symbol **
** Return : Void **
**************************************************************
** Description : Checks if the wantedSymbol is equal to the **
** currentObject Symbol, else Error Message. **
*************************************************************/
void Match(Vari.Symbol desiredSym)
{
if (Vari.Token == desiredSym)
{
if (!isSOS)
{
int namesSize;
switch (Vari.Token)
{
case Vari.Symbol.proceduret:
isProc = true;
break;
case Vari.Symbol.idt:
if (isProc)
{
CheckDuplicates(Vari.Lexeme);
Vari.entryType = EntryType.procEntry;
ObjTable.insert(Vari.Lexeme, Vari.Token, Vari.depth);
newProc(Vari.Lexeme);
}
else
{
names.Add(Vari.Lexeme);
}
break;
case Vari.Symbol.integert:
if (isConst)
{
Vari.entryType = EntryType.constEntry;
namesSize = names.Count;
for (int i = 0; i < namesSize; ++i)
{
CheckDuplicates(names[0]);
ObjTable.insert(names[0], Vari.Token, Vari.depth);
newConst(names[0], "integer");
names.RemoveAt(0);
}
isConst = false;
}
else
{
Vari.entryType = EntryType.varEntry;
Vari.varType = VarType.intType;
namesSize = names.Count;
for (int i = 0; i < namesSize; ++i)
{
CheckDuplicates(names[0]);
ObjTable.insert(names[0], Vari.Token, Vari.depth);
newVar(names[0]);
names.RemoveAt(0);
}
}
break;
case Vari.Symbol.floatt:
if (isConst)
{
Vari.entryType = EntryType.constEntry;
namesSize = names.Count;
for (int i = 0; i < namesSize; ++i)
{
CheckDuplicates(names[0]);
ObjTable.insert(names[0], Vari.Token, Vari.depth);
newConst(names[0], "real");
names.RemoveAt(0);
}
isConst = false;
}
else
{
Vari.entryType = EntryType.varEntry;
Vari.varType = VarType.floatType;
namesSize = names.Count;
for (int i = 0; i < namesSize; ++i)
{
CheckDuplicates(names[0]);
ObjTable.insert(names[0], Vari.Token, Vari.depth);
newVar(names[0]);
names.RemoveAt(0);
}
}
break;
case Vari.Symbol.chart:
Vari.entryType = EntryType.varEntry;
Vari.varType = VarType.charType;
namesSize = names.Count;
for (int i = 0; i < namesSize; ++i)
{
CheckDuplicates(names[0]);
ObjTable.insert(names[0], Vari.Token, Vari.depth);
newVar(names[0]);
names.RemoveAt(0);
}
break;
case Vari.Symbol.constantt:
isConst = true;
break;
case Vari.Symbol.ist:
if (isProc)
{
IncrementDepth();
isProc = false;
}
break;
case Vari.Symbol.lparent:
if (isProc)
{
IncrementDepth();
isProc = false;
isParam = true;
}
break;
case Vari.Symbol.rparent:
isParam = false;
break;
case Vari.Symbol.intt:
tempP.passing.Add(ModeType.inMode);
break;
case Vari.Symbol.inoutt:
tempP.passing.Add(ModeType.inoutMode);
break;
case Vari.Symbol.outt:
tempP.passing.Add(ModeType.outMode);
break;
default:
break;
}
}
else
{
if (Vari.Token == Vari.Symbol.idt)
{
int row = ObjTable.hashWrap(Vari.Lexeme);
int col = ObjTable.lookup(Vari.Lexeme);
if (col == -1)
{
Console.WriteLine("Error: there is an undeclared variable: " + Vari.Lexeme + " on line: " + Vari.lineNo);
}
}
}
Vari.myLex.getNextToken();
}
else if (Vari.Token == Vari.Symbol.eoftt)
{
return;
}
else
{
Console.WriteLine("Received: " + Vari.Token + " but expected: " + desiredSym);
Environment.Exit(1);
}
}