public VarAssignment CreateVarAssignment(StringBuilder code)
{
string s = code.ToString().Trim();
string name = GetOperand(code);
if (!game.IsVariable(name))
{
throw new Exception(s + " is not a valid variable");
}
s = code.ToString().Trim();
if (s[0] != '=')
{
throw new Exception("expected = near " + s);
}
s = s.Substring(1).Trim();
// if (!Char.IsLetter(s[0]))
// throw new Exception("unexpected symbol near " + s);
IIntResult rhs = BuildExprTree(new StringBuilder(s));
VarAssignment v = new VarAssignment()
{
VarName = name,
Right = rhs
};
return(v);
}
public void Visit(VarAssignment va)
{
// Console.WriteLine("pop stack into a ");
// Console.WriteLine("sta " + va.VarName + ", a");
sw.WriteLine("\t;variable assignment");
sw.WriteLine("\tpla");
sw.WriteLine("\tsta " + va.VarName);
}
public void Visit(VarAssignment m)
{
sw.WriteLine("\tnop ;writing a set var statement");
sw.WriteLine("\tpop ax");
sw.WriteLine("\tmov " + m.VarName + ",al");
}
public void Visit(VarAssignment m)
{
sw.WriteLine(Tabs() + "//writing a set var statement");
sw.WriteLine(Tabs() + "param1 = param_stack_pop();");
sw.WriteLine(Tabs() + m.VarName + " = param1;");
}
//void Visit(Assign m);
public void Visit(VarAssignment m)
{
sw.WriteLine("\t;writing a set var statement");
sw.WriteLine("\tpuls a");
sw.WriteLine("\tsta " + m.VarName);
}
//void Visit(Assign m);
public void Visit(VarAssignment m)
{
sw.WriteLine("\t; var assignment");
sw.WriteLine("\tpop af");
sw.WriteLine("\tld (" + m.VarName + "),a");
}