public constantType(string lex, Lexer.Symbol token, int dpth, constantType cd) : base(lex, token, dpth)
{
Value = cd.Value;
ValueR = cd.ValueR;
Offset = cd.Offset;
TypeOfConstant = cd.TypeOfConstant;
}
//<Num Term> ::= <Num Term> '*' <Num Unary>
// | <Num Term> '/' <Num Unary>
// | <Num Unary>
private ASTNode GetNumTerm(string scaleName, NumericType numType)
{
ASTNode lhs = GetNumUnary(scaleName, numType);
if (lhs == null)
{
return(null);
}
while ((m_symbol == Lexer.Symbol.Times) || (m_symbol == Lexer.Symbol.Div))
{
Lexer.Symbol operation = m_symbol;
GetToken();
ASTNode rhs = GetNumUnary(scaleName, numType);
if (rhs == null)
{
return(null);
}
else if (operation == Lexer.Symbol.Times)
{
lhs = new ASTProduct(lhs, rhs);
}
else
{
lhs = new ASTQuotient(lhs, rhs);
}
}
return(lhs);
}
//<Num Expr> ::= <Num Expr> '+' <Num Term>
// | <Num Expr> '-' <Num Term>
// | <Num Term>
private ASTNode GetNumExpr(string scaleName, NumericType numType)
{
ASTNode lhs = GetNumTerm(scaleName, numType);
if (lhs == null)
{
return(null);
}
while ((m_symbol == Lexer.Symbol.Plus) || (m_symbol == Lexer.Symbol.Minus))
{
Lexer.Symbol operation = m_symbol;
GetToken();
ASTNode rhs = GetNumTerm(scaleName, numType);
if (rhs == null)
{
return(null);
}
else if (operation == Lexer.Symbol.Plus)
{
lhs = new ASTSum(lhs, rhs);
}
else
{
lhs = new ASTDifference(lhs, rhs);
}
}
return(lhs);
}
//<Dim Term> ::= <Dim Term> '*' <Dim Factor>
// | <Dim Term> '^' <Dim Factor>
// | <Dim Term> '/' <Dim Factor>
// | <Dim Factor>
private ASTNode GetDimTerm(UnitType candidate, NumericType numType)
{
ASTNode lhs = GetDimFactor(candidate, numType);
if (lhs == null)
{
return(null);
}
while ((m_symbol == Lexer.Symbol.Times) || (m_symbol == Lexer.Symbol.Div) || (m_symbol == Lexer.Symbol.Wedge))
{
Lexer.Symbol operatorSymbol = m_symbol;
string operatorToken = m_token;
int operatorLine = m_lexer.TokenLine;
int operatorColumn = m_lexer.TokenColumn;
GetToken();
ASTNode rhs = GetDimFactor(candidate, numType);
if (rhs == null)
{
return(null);
}
else if (operatorSymbol == Lexer.Symbol.Div)
{
lhs = new ASTQuotient(lhs, rhs);
}
else if (operatorSymbol == Lexer.Symbol.Times)
{
lhs = new ASTProduct(lhs, rhs, iswedgeproduct: false);
}
else if (lhs.IsWedgeCompatible && rhs.IsWedgeCompatible)
{
lhs = new ASTProduct(lhs, rhs, iswedgeproduct: true);
}
else
{
string denote = "\u02C7\u02C7\u02C7{0}\u02C7\u02C7\u02C7"; // ˇˇˇexprˇˇˇ
Note(operatorLine, operatorColumn, operatorToken,
String.Format("{0}: wedge product incompatible factor(s): {1} ^ {2}.", candidate.Name,
lhs.IsWedgeCompatible ? lhs.ToString() : String.Format(denote, lhs),
rhs.IsWedgeCompatible ? rhs.ToString() : String.Format(denote, rhs)
)
);
return(null);
}
}
return(lhs);
}
public constantType(string lex, Lexer.Symbol token, int dpth, VarType vt, int?val = null, double?valR = null) : base(lex, token, dpth)
{
TypeOfConstant = vt;
Offset = findOffset();
if (val != null)
{
Value = val;
}
else if (valR != null)
{
ValueR = valR;
}
else
{
Console.WriteLine("Error! Values are null.");
}
}
private Lexer.Symbol GetToken()
{
m_symbol = m_lexer.GetToken();
m_token = m_lexer.TokenText;
return(m_symbol);
}
public functionType(string lex, Lexer.Symbol token, int dpth, VarType returnType, LinkedList <parameterType> parameters) : base(lex, token, dpth)
{
ReturnType = returnType;
NumberOfParameters = parameters?.Count;
SizeOfLocal = SizeOfParameters(parameters);
}
public varType(string lex, Lexer.Symbol token, int dpth, VarType varT, int off) : base(lex, token, dpth)
{
TypeOfVariable = varT;
Offset = off + getSize(varT);
size = getSize(varT);
}
public varType(string lex, Lexer.Symbol token, int dpth) : base(lex, token, dpth)
{
}
public symTableRecord(string lex, Lexer.Symbol token, int dpth)
{
Lexeme = lex;
depth = dpth;
Token = token;
}
//inserts into symbol table after going through checks
public void insert(string lex, Lexer.Symbol token, int dpth, EntryType et, VarType vt, LinkedList <parameterType> p = null, constantType c = null)
{
int key = hash(lex);
bool found = false;
foreach (var i in symTable)
{
if (i != null)
{
foreach (var j in i)
{
if (j.Lexeme == lex && j.depth == dpth)
{
found = true;
}
}
}
}
if (found)
{
Console.WriteLine($"Error Found: {lex} already exits at depth: {dpth}");
Console.ReadLine();
Environment.Exit(0);
}
else
{
if (symTable[key] == null)
{
symTable[key] = new LinkedList <symTableRecord>();
}
switch (et)
{
case EntryType.varEntry:
symTable[key].AddFirst(new varType(lex, token, dpth, vt, calcVarOffset(dpth)));
break;
case EntryType.constEntry:
symTable[key].AddFirst(new constantType(lex, token, dpth, c));
break;
case EntryType.functionEntry:
symTable[key].AddFirst(new functionType(lex, token, dpth, vt, p));
break;
case EntryType.parameterEntry:
int totalOffset = 0;
for (int i = 0; i < TableSize; i++)
{
if (symTable[i] != null)
{
var TsymTable = new LinkedList <symTableRecord>(symTable[i]);
foreach (parameterType item in TsymTable.OfType <parameterType>())
{
if (item.depth == dpth)
{
totalOffset = item.Size + totalOffset;
}
}
}
}
symTable[key].AddFirst(new parameterType(lex, dpth, vt, totalOffset));
break;
}
}
}
