public static void TraverseTree(Node root)
{
if (root.Name == "procdecl")
{
currentScope = root.children[0].children[1].Name;
FuncTable.Add(currentScope, new funcVal());
currentParam = new List <string>();
ParamTraverse(root);
FuncTable[currentScope].dts = currentParam;
FuncTable[currentScope].paramNo = currentParam.Count;
}
for (int i = 0; i < root.children.Count; i++)
{
TraverseTree(root.children[i]);
}
if (root.Name == "vardecl")
{
handleVarDecl(root);
}
if (root.Name == "Param decl")
{
if (SymbolTable.ContainsKey(root.children[1].Name))
{
MessageBox.Show("variable already declared");
}
else
{
SymbolVal sv = new SymbolVal();
sv.DataType = root.children[0].children[0].Name;
sv.Value = 0;
sv.Scope = currentScope;
SymbolTable.Add(root.children[1].Name, sv);
}
}
}
public static void TraverseTree(Node root)
{
if (root.Name == "Proc header")
{
currentScope = root.children[1].Name;
if (FunctionTable.ContainsKey(currentScope))
{
MessageBox.Show("ERROR");
}
else
{
FunctionVal fv = new FunctionVal();
FunctionTable.Add(currentScope, fv);
}
}
if (root.Name == "paramdecls")
{
count = 0;
dts = new List <string>();
handleParam(root);
FunctionTable[currentScope].paramNumber = count;
FunctionTable[currentScope].paramDatatype = dts;
}
for (int i = 0; i < root.children.Count; i++)
{
TraverseTree(root.children[i]);
}
if (root.Name == "vardecl")
{
handleVarDecl(root);
}
if (root.Name == "Param decl")
{
if (SymbolTable.ContainsKey(root.children[1].Name))
{
MessageBox.Show("variable already declared");
}
else
{
SymbolVal sv = new SymbolVal();
sv.datatype = root.children[0].children[0].Name;
sv.val = 0;
sv.scope = currentScope;
SymbolTable.Add(root.children[1].Name, sv);
}
}
}
public static void handleIDlist(Node node)
{
node.children[0].datatype = node.datatype;
if (SymbolTable.ContainsKey(node.children[0].Name))
{
MessageBox.Show("variable already declared");
}
else
{
SymbolVal sv = new SymbolVal();
sv.DataType = node.children[0].datatype;
sv.Value = 0;
sv.Scope = "Global";
SymbolTable.Add(node.children[0].Name, sv);
}
if (node.children.Count > 1)
{
node.children[2].datatype = node.datatype;
handleIDlist(node.children[2]);
}
}