void _Parser_OnReduce(LALRParser parser, ReduceEventArgs args)
{
Func <Parser, NonterminalToken, object> handler;
if (Internal.GrammarRules.Handlers.TryGetValue((RuleConstants)args.Rule.Id, out handler))
{
try
{
args.Token.UserObject = handler(this, args.Token);
}
catch (Exception ex)
{
Errors.Add(string.Format("{0}: {1}", args.Rule.ToString(), ex.Message));
args.Continue = false;
}
return;
}
//This may happen for things that are not implemented yet because they
//"unbalance" the AST
if (args.Token.Tokens.Length != 1)
{
Errors.Add(string.Format("{0}: Internal problem", args.Rule.ToString()));
args.Continue = false;
return;
}
args.Token.UserObject = args.Token.Tokens[0].UserObject;
}
/// <summary>
/// Event handler for the reduce action.
/// </summary>
/// <param name="parser">parser that is the source of this event</param>
/// <param name="args">event arguments</param>
private void ReduceEvent(LALRParser parser, ReduceEventArgs args)
{
//WriteLn(args.Rule.Id.ToString());
//WriteLn(args.Rule.Lhs.Id.ToString());
AddViewItem("Reduce",
null,
args.Token.Rule.ToString(),
"",
args.NewState.Id.ToString(),
2);
}
private void ReduceEvent(LALRParser parser, ReduceEventArgs args)
{
try
{
args.Token.UserObject = CreateObject(args.Token);
}
catch (ApplicationException ex)
{
args.Continue = false;
Logger.Log(DateTime.Now + ": " + ex.Message);
//todo: Report message to UI?
}
}
private void ReductionEvent(ReduceEventArgs pValue)
{
switch (pValue.Token.Symbol.ToString())
{
case "<Value>":
string Value = ""; //pValue.Token.Tokens[0].ToString().Trim(new char[] { '{', '}' });
//System.Console.Write(Value);
this.NodeStack.Push(new TreeNode(Value));
break;
case "<Negate Exp>":
System.Collections.Generic.LinkedListNode <string> Node = new System.Collections.Generic.LinkedListNode <string>("-");
//System.Console.Write("-");
TreeNode NegateNode = new TreeNode("-");
NegateNode.Right = this.NodeStack.Pop();
this.NodeStack.Push(NegateNode);
break;
case "<Add Exp>":
//System.Console.Write("+");
TreeNode AddExpNode = new TreeNode("+");
AddExpNode.Right = this.NodeStack.Pop();
AddExpNode.Left = this.NodeStack.Pop();
this.NodeStack.Push(AddExpNode);
break;
case "<Assign_Statement>":
string Identifier = ""; //args.Token.Tokens[0].ToString().Trim(new char[] { '[', ']' });
//System.Console.Write(Identifier);
//System.Console.Write("=");
TreeNode AssignNode = new TreeNode("=");
this.TreeList.GetLast().Right = AssignNode;
AssignNode.Right = this.NodeStack.Pop();
AssignNode.Left = new TreeNode(Identifier);
this.NodeStack.Push(AssignNode);
break;
case "<Statement>":
TreeNode Statement = new TreeNode("statement\n");
Statement.Right = this.NodeStack.Pop();
Statement.Left = this.NodeStack.Pop();
this.NodeStack.Push(Statement);
break;
case "<StatementList>":
TreeNode StatementList = new TreeNode("sl\n");
StatementList.Right = this.NodeStack.Pop();
StatementList.Left = this.NodeStack.Pop();
this.NodeStack.Push(StatementList);
break;
case "<Program>":
TreeNode Program = new TreeNode("program");
Program.Right = this.NodeStack.Pop();
Program.Left = this.NodeStack.Pop();
this.NodeStack.Push(Program);
break;
default:
System.Console.WriteLine(pValue.Token.Symbol.ToString());
break;
}
}
private static void P_OnReduce(LALRParser parser, ReduceEventArgs args)
{
// Console.WriteLine(args.Token.Tokens.Length);
// abc2.Add(args.Token);
}
