public void Insert(TreeNode pNode)
{ // pNode.nodekind must be funK,
// pNode.name must be not in FunDecListRec;
FunDecListRec temp = new FunDecListRec(pNode.Name, pNode.Type);
// count the params
TreeNode p = pNode.Child[0]; // params link in pNode.chilld[0].sibling
temp.lineno = pNode.LineNum; // record functions' line
if (p != null)
{
temp.Params = new ParamListRec(p.Type, p.IsArray);
temp.count++;
ParamListRec l = temp.Params;
while (p.Sibling != null)
{
p = p.Sibling;
l.next = new ParamListRec(p.Type, p.IsArray);
l = l.next;
temp.count++;
}
}
if (first == null) // has not function declarations in list
{
first = last = temp;
}
else
{
last.next = temp;
last = last.next;
}
}
/// <summary>
/// check if a function call's argument match its declaration parameters;
/// return -1, not found;
/// return -2, type not match;
/// return -3, match;
/// else return delcaration parameter count, not match, and
/// "string &args" is the function's parament list, like "int, int[], int"
/// line to record the functions' lineno that its defined here.
/// </summary>
public int Check(TreeNode pNode, string args, ref int line)
{
FunDecListRec l = first;
while ((l != null) && l.name != pNode.Name)
{
l = l.next;
}
if (l == null)
{
return(-1); // function use before its declaration or not declara
}
ParamListRec p = l.Params;
TreeNode t = pNode.Child[0];
// record paraments list, this is not a good idea
while (p != null)
{
if (p.type == TokenType.VOID)
{
args = "void, " + args;
}
else if (p.type == TokenType.INT)
{
args = (p.isArr ? "int[], " : "int, ") + args;
}
p = p.next;
}
// args.erase(args.Length-2); // erase last ", "
args = args.Remove(args.Length - 2, 1);
line = l.lineno;
// set it point to l.params after record paraments list
p = l.Params;
while (p != null && t != null)
{
if ((p.type == t.Type && p.isArr == t.IsArray) ||
(t.NodeKind == NodeKind.expK && t.exp == ExpKind.ConstK && t.Type == TokenType.NUMBER))
{
p = p.next;
t = t.Sibling;
}
else
{
return(-2); // type not match;
}
}
if (p != null || t != null)
{
return(l.count); // params count not match
}
else
{
return(-3); // all match;
}
}
