public AnnoNode GenerateParseTree(AnnoNode node)
{
if (node.thisTok.ttype == Ttype.Terminal)
{
return(node);
}
Production currRule = ParserResult[ResultID];
node.geneTok = new AnnoNode[currRule.Rules().Length];
node.mProduction = new RuleProduction(currRule.mrule);
for (int i = currRule.Rules().Length - 1; i >= 0; i--)
{
Token token = Token.GetToken(currRule.Rules()[i]);
if (token.ttype == Ttype.Nontermi)
{
ResultID--;
}
node.geneTok[i] = GenerateParseTree(new AnnoNode(token));
}
return(node);
}
/* parse expression is one of the semantic movement
* to place it here just for balancing code number
* althought it increases coupling and reduce integration*/
public static void ParseExpr(AnnoNode node)
{
node.geneTok[0].SemanticAnalysis();
node.geneTok[2].SemanticAnalysis();
Def opera = (Def)node.geneTok[1].mOp;
IOperator a = node.geneTok[0].mOp;
IOperator b = node.geneTok[2].mOp;
string ans = "0";
switch (opera.getValue())
{
case "+":
{
ans = ValueCalculations.Add(a, b);
break;
}
case "-":
{
ans = ValueCalculations.Subtract(a, b);
break;
}
case "*":
{
ans = ValueCalculations.Multiply(a, b);
break;
}
case "/":
{
//TODO :Handling semantic error
if (b.getValue() == "0")
{
UIHelper.Log("Error in Semantic Analyzer: divide by 0");
Thread.CurrentThread.Abort();
}
ans = ValueCalculations.Diverse(a, b);
break;
}
case ">=":
{
ans = (bool.Parse(ValueCalculations.Greater(a, b)) || bool.Parse(ValueCalculations.Equal(a, b))).ToString();
break;
}
case "<=":
ans = (bool.Parse(ValueCalculations.Smaller(a, b)) || bool.Parse(ValueCalculations.Equal(a, b))).ToString();
break;
case ">":
ans = ValueCalculations.Greater(a, b);
break;
case "<":
ans = ValueCalculations.Smaller(a, b);
break;
}
node.mOp.setValue(ans);
}