public System.IAsyncResult Beginacquire(acquire acquire, System.AsyncCallback callback, object asyncState)
{
return this.BeginInvoke("acquire", new object[] {
acquire}, callback, asyncState);
}
private stmt ParseStmt()
{
stmt result;
#region newline
linecount();
#endregion
if (index < tokens.Count - 1)
{
#region DISPLAY
if (index != tokens.Count - 1 && tokens[index].ToString().Equals("display"))
{
// linecount();
// ////MessageBox.Show("i am in display");
display Display = new display();
index++;
linecount();
Display.Expr = ParsExpr("blah");
if (Display.Expr is StringLiteral || Display.Expr is Variable)
{
if (Display.Expr is Variable)
{
//MessageBox.Show(tokens[index - 1].ToString());
if (!identifier.identity.Contains(tokens[index - 1].ToString()))
{
adderror("undeclared identifier");
linecount();
// index++;
}
else if (identifier.assignment[identifier.identity.IndexOf(tokens[index - 1].ToString())] == false)
{
adderror(tokens[index - 1].ToString() + " : unassigned");
linecount();
// index++;
}
}
if (!tokens[index].Equals(scanner.opend.endline))
{
adderror("Expected Endline Character");
index--;
}
//else
//{
index++;
linecount();
//}
result = Display;
// ////MessageBox.Show(tokens[index].ToString());
}
else
{
result = null;
adderror("expected Variable or Display Statement");
index++;
linecount();
if (!tokens[index].Equals(scanner.opend.endline))
{
adderror("Expected Endline Character");
index--;
//index++;
}
}
counts++;
}
#endregion
#region For vs and cs and register and int
else if (tokens[index].ToString().Equals("vs") || tokens[index].ToString().Equals("cs") || tokens[index].ToString().Equals("register") || tokens[index].ToString().Equals("int") || tokens[index].ToString().Equals("string"))
{
string dose = tokens[index].ToString();
index++;
linecount();
DeclareS sources = new DeclareS();
if (!(index < tokens.Count && tokens[index] is string))
{
adderror("expected variable name");
index++;
linecount();
}
else if (identifier.identity.Contains(tokens[index].ToString()))
{
adderror(tokens[index].ToString() + " : redefinition");
index++;
linecount();
}
else
{
sources.Ident = tokens[index].ToString();
}
index++;
linecount();
if ((index == tokens.Count) || (!(tokens[index].Equals((object)scanner.opend.equal)) && !(tokens[index].Equals(scanner.opend.endline))))
{
//////MessageBox.Show(tokens[index].ToString());
adderror("Expected #/=");
// index++;
}
#region var identifier
if (tokens[index].Equals((object)scanner.opend.endline))
{
Just_Declare classy = new Just_Declare();
classy.Ident = tokens[index - 1].ToString();
if (identifier.identity.Contains(tokens[index - 1].ToString()))
{
adderror(tokens[index - 1].ToString() + " : redefinition");
index++;
linecount();
}
identifier.identity.Add(classy.Ident.ToString());
identifier.assignment.Add(false);
result = classy;
index++;
linecount();
}
#endregion
else
{
index++;
linecount();
sources.Expr = ParsExpr("blah");
if (dose == "string")
{
//MessageBox.Show("hello world");
if (!(sources.Expr is StringLiteral))
{
adderror("expected string type");
index++;
sources = null;
}
else
{
//MessageBox.Show("lala");
identifier.identity.Add(sources.Ident.ToString());
identifier.assignment.Add(true);
MessageBox.Show("haha");
//index++;
MessageBox.Show(tokens[index].ToString());
}
if (!tokens[index].Equals(scanner.opend.endline))
{
//////MessageBox.Show(tokens[index].ToString());
adderror("Exepected Endline Character");
index--;
}
index++;
linecount();
result = sources;
}
else
{
if (sources.Expr is StringLiteral)
{
adderror("expected variable or integer after '=' ");
//index++;
}
else if (sources.Expr is Variable)
{
if (!identifier.identity.Contains(tokens[index - 1].ToString()))
{
//////MessageBox.Show();
adderror(tokens[index - 1].ToString() + " undeclared identifier");
// index++;
}
else if (identifier.assignment[identifier.identity.IndexOf(tokens[index - 1].ToString())] == false)
{
adderror(tokens[index - 1].ToString() + " : unassigned");
// index++;
}
}
identifier.identity.Add(sources.Ident.ToString());
identifier.assignment.Add(true);
if (!tokens[index].Equals(scanner.opend.endline))
{
//////MessageBox.Show(tokens[index].ToString());
adderror("Exepected Endline Character");
index--;
}
index++;
linecount();
result = sources;
}
}
counts++;
}
#endregion
#region for Acquire
else if (tokens[index].ToString().Equals("acquire"))
{
index++;
linecount();
acquire acquire = new acquire();
if (index < tokens.Count && tokens[index] is string)
{
acquire.Ident = tokens[index].ToString();
////MessageBox.Show(tokens[index].ToString());
if (!identifier.identity.Contains(acquire.Ident.ToString()))
{
adderror("Expected declared Identifier");
//index++;
}
result = acquire;
identifier.assignment[identifier.identity.IndexOf(tokens[index].ToString())] = true;
index++;
if (!tokens[index].Equals(scanner.opend.endline))
{
adderror("Expected Endline Character");
index--;
//index++;
}
linecount();
}
else
{
result = null;
adderror("Expected Identifier");
}
index++;
linecount();
counts++;
}
#endregion
#region If and If Else
else if (tokens[index].ToString().Equals("if"))
{
bool ife = false;
index++;
linecount();
ifS ifs = new ifS();
ifElse ifelse = new ifElse();
ifs.Cond = ParseCond();
if (ifs.Cond is IntLiteral || ifs.Cond is Something || ifs.Cond is Variable)
{
adderror("Expected Conditional Statement");
//index++;
}
//index++;
if (index == tokens.Count || !(tokens[index].ToString().Equals("do")))
{
adderror("Expected do");
index--;
}
index++;
linecount();
ifs.Body = ParseStmt();
// ////MessageBox.Show(tokens[index].ToString() + " b4 else");
//index++;
#region ifelse
if (tokens[index].ToString().Equals("else"))
{
index++;
linecount();
ifelse.ifEverything = ifs;
if (index == tokens.Count || !(tokens[index].ToString().Equals("do")))
{
adderror("Expected do");
index--;
}
index++;
linecount();
ifelse.bodyelse = ParseStmt();
//index++;
if (index == tokens.Count || !(tokens[index].ToString().Equals("endelse")))
{
adderror("unterminated 'if else' body");
//index++;
}
ife = true;
}
#endregion
else if (index == tokens.Count || !(tokens[index].ToString().Equals("endif")))
{
result = null;
adderror("unterminated 'if' body");
index++;
}
if (!ife)
{
index++;
linecount();
if (index == tokens.Count || !(tokens[index].Equals((object)scanner.opend.endline)))
{
result = null;
adderror("Expected endline character #");
index--;
}
else
{
result = ifs;
}
}
else
{
index++;
linecount();
if (index == tokens.Count || !(tokens[index].Equals((object)scanner.opend.endline)))
{
result = null;
adderror("Expected endline character #");
index--;
}
else
{
result = ifelse;
}
}
index++;
linecount();
counts++;
}
#endregion
#region While loop
else if (tokens[index].ToString().Equals("while"))
{
index++;
linecount();
whileLoop whilel = new whileLoop();
whilel.cond = ParseCond();
////MessageBox.Show(tokens[index].ToString());
//index++;
if (index == tokens.Count || !(tokens[index].ToString().Equals("do")))
{
////MessageBox.Show(tokens[index].ToString());
adderror("Expected do");
index--;
}
index++;
linecount();
//////MessageBox.Show(tokens[index].ToString());
whilel.body = ParseStmt();
////MessageBox.Show(tokens[index].ToString());
//index++;
if (index == tokens.Count || !(tokens[index].ToString().Equals("endwhile")))
{
adderror("unterminated 'while' loop body");
}
index++;
linecount();
if (index == tokens.Count || !(tokens[index].Equals((object)scanner.opend.endline)))
{
adderror("Expected endline #");
index--;
}
result = whilel;
index++;
linecount();
counts++;
////MessageBox.Show(tokens[index].ToString()+" in while");
}
#endregion
#region Assignment
else if (tokens[index] is string)
{
assign assign = new assign();
if (!identifier.identity.Contains(tokens[index].ToString()))
{
adderror(tokens[index] + " undeclared identifier");
}
assign.Ident = tokens[index].ToString();
index++;
linecount();
if (tokens.Count == index || !(tokens[index].Equals((object)scanner.opend.equal)))
{
adderror("expected '='");
}
index++;
linecount();
assign.Expr = ParsExpr("blah");
if (assign.Expr is StringLiteral)
{
adderror("Expected integer/variable");
}
else if (assign.Expr is Variable)
{
if (!identifier.identity.Contains(tokens[index - 1].ToString()))
{
adderror(tokens[index - 1] + " : undeclared identifier");
}
else if (identifier.assignment[identifier.identity.IndexOf(tokens[index - 1].ToString())] == false)
{
adderror(tokens[index - 1].ToString() + " : unassigned");
}
}
result = assign;
if (index < tokens.Count)
{
if (tokens[index].ToString().Equals("#"))
{
adderror("Expected EndLine Character");
index--;
}
}
//index++;
counts++;
}
#endregion
#region Invalid Statement
else
{
linecount();
adderror("parse error at token " + index + ": " + tokens[index]);
result = ParseStmt();
}
#endregion
#region statement list
//MessageBox.Show("b4 stmt_list");
if ((index < tokens.Count) && (!(tokens[index].ToString().Equals("end"))))
{
// index++;
if (((!tokens[index].ToString().Equals("endwhile") && !tokens[index].ToString().Equals("endif"))) && (!tokens[index].ToString().Equals("endelse") && !tokens[index].ToString().Equals("else")))
{
//MessageBox.Show("i m in stmt_list");
linecount();
//MessageBox.Show(tokens[index ].ToString());
sequence seq = new sequence();
seq.first = result;
seq.second = ParseStmt();
result = seq;
}
}
//}
#endregion
return(result);
}
else
{
return(null);
}
}
