public object Setq(Symbol id, object value)
{
ILocation<object> binding;
if (!variables.TryGetValue (id, out binding))
Bind (id, Namespace.Variable, new ValueCell<object> (value));
else
binding.Value = value;
return value;
}
public void Bind(Symbol id, Namespace nspace, ILocation<Object> location)
{
switch (nspace)
{
case Namespace.Variable:
variables.Add(id, location);
break;
default:
throw new NotImplementedException ();
}
}
public Delegate SymbolFunction(Symbol id)
{
ILocation<Delegate> binding;
if (functions.TryGetValue (id, out binding))
return binding.Value;
if (id.NamesDotnetMethod ()) {
Delegate gf = (Delegate) CL.EnsureGenericFunction (id, KW.GenericFunctionClass, CLOS.DotnetGenericFunction,
KW.Environment, this,
KW.StudlyName, id.Name);
binding = new ValueCell<Delegate> (gf);
return binding.Value;
}
else
throw new NotImplementedException ();
}
public object SymbolValue(Symbol id)
{
ILocation<object> binding;
if (variables.TryGetValue (id, out binding))
return binding.Value;
else
throw new NotImplementedException ();
}
public bool IsFbound(Symbol id)
{
return functions.ContainsKey (id);
}
public bool IsBound(Symbol id)
{
return variables.ContainsKey (id);
}
public virtual Symbol Intern(string name)
{
if (name == null)
throw new ArgumentNullException ("name");
Predicate<Symbol> matchString = new Predicate<Symbol> (new StringMatcher (name).MatchesSymbol);
Symbol probe = this.PresentSymbolList.Find (matchString);
if (probe != null)
return probe;
else {
foreach (Package u in this.PackageUseList) {
probe = u.ExternalSymbolList.Find (matchString);
if (probe != null)
return probe;
}
probe = new Symbol (name, this);
this.PresentSymbolList.Add (probe);
return probe;
}
}
public void Export(Symbol sym)
{
if (this.ExternalSymbolList.Contains (sym))
return;
this.ExternalSymbolList.Add (sym);
}
public bool MatchesSymbol(Symbol s)
{
return s.Name == this.ToMatch;
}