private static bool Parameter()
{
if (!type())
{
return(false);
}
if (semanticPass)
{
SemanticActions.tExist();
}
Tokens.NextToken();
if (Tokens.GetToken().type != Token.Type.Identifier)
{
SyntaxError(Tokens.GetToken(), "identifer");
}
identifierToken = Tokens.GetToken();
if (semanticPass)
{
SemanticActions.dup(identifierToken, (scope + "." + currentIdentifier));
}
if (Tokens.PeekToken().lexeme == "[")
{
currentType = "@" + currentType;
}
parameters += "P" + uniqueCounter;
string[] data = new string[2];
data[0] = "returnType:" + currentType;
data[1] = "accessMod:" + accessMod;
Symbol symbol = new Symbol((scope + "." + currentIdentifier), ("P" + uniqueCounter++), Tokens.GetToken().lexeme, "Param", data);
Tokens.NextToken();
if (Tokens.GetToken().lexeme == "[")
{
Tokens.NextToken();
if (Tokens.GetToken().lexeme != "]")
{
SyntaxError(Tokens.GetToken(), "]");
}
Tokens.NextToken();
}
SymbolTable.Add(symbol);
return(true);
}
private static bool numeric_literal()
{
if (Tokens.GetToken().lexeme == "+" || Tokens.GetToken().lexeme == "-")
{
if (Tokens.PeekToken().type != Token.Type.Number)
{
return(false);
}
string sign = Tokens.GetToken().lexeme;
if (sign == "+")
{
sign = "";
}
Tokens.NextToken();
string[] data = new string[2];
data[0] = "returnType:int";
data[1] = "accessMod:public";
Symbol symbol = new Symbol("g", ("N" + sign + Tokens.GetToken().lexeme), (sign + Tokens.GetToken().lexeme), "ilit", data);
SymbolTable.Add(symbol);
if (semanticPass)
{
SemanticActions.lPush(symbol, Tokens.GetToken(), scope);
}
}
else if (Tokens.GetToken().type == Token.Type.Number)
{
string[] data = new string[2];
data[0] = "returnType:int";
data[1] = "accessMod:public";
Symbol symbol = new Symbol("g", ("N" + Tokens.GetToken().lexeme), Tokens.GetToken().lexeme, "ilit", data);
SymbolTable.Add(symbol);
if (semanticPass)
{
SemanticActions.lPush(symbol, Tokens.GetToken(), scope);
}
}
else
{
return(false);
}
return(true);
}
private static bool VariableDeclaration()
{
if (Tokens.PeekToken().type != Token.Type.Identifier)
{
return(false);
}
if (!type())
{
return(false);
}
if (semanticPass)
{
SemanticActions.tExist();
}
Tokens.NextToken();
currentIdentifier = Tokens.GetToken().lexeme;
identifierToken = Tokens.GetToken();
Tokens.NextToken();
if (Tokens.GetToken().lexeme == "[")
{
Tokens.NextToken();
currentType = "@" + currentType;
if (Tokens.GetToken().lexeme != "]")
{
SyntaxError(Tokens.GetToken(), "]");
}
Tokens.NextToken();
}
string[] data = new string[2];
data[0] = "returnType:" + currentType;
data[1] = "accessMod:" + accessMod;
Symbol symbol = new Symbol(scope, ("L" + uniqueCounter++), currentIdentifier, "lvar", data);
identifierSymbol = symbol;
if (semanticPass)
{
SemanticActions.dup(identifierToken, scope);
SemanticActions.vPush(symbol, identifierToken, scope);
}
SymbolTable.Add(symbol);
if (Tokens.GetToken().lexeme == "=")
{
if (semanticPass)
{
SemanticActions.oPush(Tokens.GetToken());
}
Tokens.NextToken();
if (!AssignmentExpression())
{
SyntaxError(Tokens.GetToken(), "assignment expression");
}
}
if (Tokens.GetToken().lexeme != ";")
{
SyntaxError(Tokens.GetToken(), ";");
}
if (semanticPass)
{
SemanticActions.EOE();
}
Tokens.NextToken();
return(true);
}
private static bool FieldDeclaration()
{
if (Tokens.GetToken().lexeme == "(")
{
Tokens.NextToken();
parameters = "";
string methodType = currentType;
offset = 0;
sizeParameters = 0;
ParameterList();
methodSize = 0;
string[] data = new string[2];
data[0] = "returnType:" + methodType;
data[1] = "accessMod:" + accessMod;
Symbol symbol = new Symbol(scope, ("M" + uniqueCounter++), currentIdentifier, "method", data);
symbol.parameters = parameters;
currentMethodName = "M";
if (semanticPass)
{
ICode.FUNC(symbol.symid);
}
if (Tokens.GetToken().lexeme != ")")
{
SyntaxError(Tokens.GetToken(), ")");
}
Tokens.NextToken();
if (!MethodBody())
{
SyntaxError(Tokens.GetToken(), "method body");
}
symbol.size = methodSize;
SymbolTable.Add(symbol);
offset = 0;
methodSize = 0;
return(true);
}
else
{
bool flag = false;
if (Tokens.GetToken().lexeme == "[")
{
flag = true;
if (Tokens.PeekToken().lexeme != "]")
{
return(false);
}
Tokens.NextToken();
Tokens.NextToken();
}
if (semanticPass)
{
SemanticActions.vPush(identifierSymbol, identifierToken, scope);
}
if (Tokens.GetToken().lexeme == "=")
{
flag = true;
if (semanticPass)
{
SemanticActions.oPush(Tokens.GetToken());
}
Tokens.NextToken();
if (!AssignmentExpression())
{
return(false);
}
}
if ((Tokens.GetToken().lexeme == ";"))
{
if (semanticPass)
{
SemanticActions.EOE();
}
Tokens.NextToken();
return(true);
}
if (flag)
{
SyntaxError(Tokens.GetToken(), ";");
}
}
return(false);
}
