//assigens value to variable
static object Be_Fu(SymbolTable s)
{
if (!(s.GetVariable(new Id("~id")) is Id))
throw new Exception("invalid ID");
Id name = (s.GetVariable(new Id("id")) as Id);
object value = s.GetVariable(new Id("~value"));
while (value is Id)
value = s.GetVariable(value as Id);
//Console.WriteLine("variable \"" + name + "\" has been assigend with the value \"" + value.ToString() + "\"");
return s.SetVariable(name, value);
}
//assigens value to variable
static object Be_Fu(SymbolTable s)
{
if (!(s.GetVariable(new Id("~id")) is Id))
{
throw new Exception("invalid ID");
}
Id name = (s.GetVariable(new Id("id")) as Id);
object value = s.GetVariable(new Id("~value"));
while (value is Id)
{
value = s.GetVariable(value as Id);
}
//Console.WriteLine("variable \"" + name + "\" has been assigend with the value \"" + value.ToString() + "\"");
return(s.SetVariable(name, value));
}
public object SetVariable(Id id, object value)
{
try {
if (id.Length > 1)
{
SymbolTable scope = (SymbolTable)this.GetVariable(new Id(id.Head));
id.Path.RemoveFirst();
return(scope.SetVariable(id, value));
}
_symbols[id.Head] = value;
return(value);
}
catch {
if (Perent == null)
{
throw new Exception("Variable \"" + id + "\" is undefined");
}
return(this.Perent.SetVariable(id, value));
}
}