public GTTree(IEnumerable<Value> list)
: this()
{
var v = new GTTree();
foreach (Value ex in list)
v = (GTTree)v.Add(ex);
// fake mutator
this.Value = v.Value;
this.Left = v.Left;
this.Right = v.Right;
}
public Value Evaluate(Scope scope)
{
// Evaluate the function
Value v = Function.Evaluate(scope);
Value ret = new GTTree();
int c = v.Count;
foreach (var res in v.Enumerate())
{
var r = res.Self();
if (r.Type != GTType.Function)
if (c == 1)
throw new InvalidOperationException("Cannot call non-function type");
else
continue;
GTFunction f = (GTFunction)res;
// Check the parameter count
if (Parameters.Count > f.Parameters.Count)
if (c == 1)
throw new InvalidOperationException("Too many arguments in call to function: " + Function.ToString());
else
continue;
// Create evaluation context
Scope s = new Scope(f.Container);
// Add this() for recursion
s.Add("this", f);
for (int i = 0; i < Parameters.Count; i++)
s.Add(f.Parameters[i], Parameters[i].Evaluate(scope));
// All parameters filled
if (Parameters.Count == f.Parameters.Count)
{
Value o;
if (f.Body == null)
{
// Invoke the method
var w = (WrapperFunc)f;
o = (Value)w.Method.Invoke(null, (from par in w.Parameters
select new Usage(par).Evaluate(s)).ToArray());
}
else
o = f.Body.Evaluate(s);
ret = ret.Add(o);
continue;
}
// No partial application in list context
if (c > 1)
continue;
// Partial application: Create a new function
var newparams = new List<string>();
for (int i = f.Parameters.Count - Parameters.Count; i < f.Parameters.Count; i++)
newparams.Add(f.Parameters[i]);
return new GTFunction(f.Body, s, newparams);
}
if (ret.Count == 1)
return ret[0]; // single values -> skip the list stuff
else
return ret;
}