public override bool Admissable(Frame th, Variable[] pos, VarHash named)
{
if (named != null && named.IsNonEmpty)
{
return(false);
}
if (!AdmissableArity(pos.Length))
{
return(false);
}
object dummy;
for (int i = 0; i < args.Length; i++)
{
if (!CLRWrapperProvider.CoerceArgument(out dummy, args[i], pos[i]) ||
(refs[i] && !pos[i].rw))
{
return(false);
}
}
// XXX: maybe param arrays should be treated as slurpies?
for (int i = args.Length; i < pos.Length; i++)
{
if (!CLRWrapperProvider.CoerceArgument(out dummy, param_array, pos[i]))
{
return(false);
}
}
return(true);
}
internal static VarHash Thaw(ThawBuffer tb)
{
VarHash r = new VarHash();
tb.Register(r);
int c = tb.Int();
for (int i = 0; i < c; i++)
{
r[tb.String()] = (Variable)tb.ObjRef();
}
return(r);
}
// throws on dispatch failure
public MultiCandidate DoDispatch(Frame th, Variable[] pos, VarHash named)
{
MultiCandidate[] avail = GetCandidateList(pos.Length);
int last_ix;
for (last_ix = avail.Length - 1; last_ix >= 0; last_ix--)
{
if (avail[last_ix].Admissable(th, pos, named))
{
break;
}
}
if (last_ix < 0)
{
throw new NieczaException("No candidates for dispatch to " + name +
"; candidates are:" + Console.Out.NewLine + " " +
Kernel.JoinS(Console.Out.NewLine + " ", avail));
}
foreach (int ci in avail[last_ix].conflictors)
{
if (avail[ci].Admissable(th, pos, named))
{
List <MultiCandidate> matched = new List <MultiCandidate>();
foreach (MultiCandidate mc in avail)
{
if (mc.Admissable(th, pos, named))
{
matched.Add(mc);
}
}
throw new NieczaException("Ambiguous dispatch for " + name +
"; matched candidates are:" + Console.Out.NewLine + " " +
Kernel.JoinS(Console.Out.NewLine + " ", matched));
}
}
if (CLROpts.MMDDebug)
{
Console.WriteLine("Using {0}", avail[last_ix]);
}
return(avail[last_ix]);
}
public Variable Invoke(object obj, Variable[] pos, VarHash named)
{
object[] argv = new object[args.Length +
(param_array != null ? 1 : 0)];
for (int i = 0; i < args.Length; i++)
{
CLRWrapperProvider.CoerceArgument(out argv[i], args[i], pos[i]);
}
if (param_array != null)
{
int npa = pos.Length - args.Length;
Array pa = Array.CreateInstance(param_array, npa);
for (int j = 0; j < npa; j++)
{
object arg;
CLRWrapperProvider.CoerceArgument(out arg, param_array, pos[j + args.Length]);
pa.SetValue(arg, j);
}
argv[args.Length] = pa;
}
if (what_call is MethodInfo)
{
MethodInfo mi = (MethodInfo)what_call;
object ret = mi.Invoke((mi.IsStatic ? null : obj), argv);
WritebackRefs(pos, argv);
return(CLRWrapperProvider.BoxResult(mi.ReturnType, ret));
}
else if (what_call is ConstructorInfo)
{
ConstructorInfo ci = (ConstructorInfo)what_call;
object ret = ci.Invoke(argv);
WritebackRefs(pos, argv);
return(CLRWrapperProvider.BoxResult(ci.DeclaringType, ret));
}
else if (what_call is FieldInfo)
{
return(new FieldProxy((FieldInfo)what_call, obj));
}
else if (what_call is PropertyInfo)
{
return(new PropertyProxy((PropertyInfo)what_call, obj, argv));
}
else
{
throw new NieczaException("Unhandled member type " + what_call.GetType());
}
}
public VarHash(VarHash from)
{
hfree = from.hfree;
count = from.count;
int l = from.heap.Length;
if (from.htab != null)
{
htab = new int[l];
Array.Copy(from.htab, 0, htab, 0, l);
}
else
{
htab = null;
}
heap = new VarHashLink[l];
Array.Copy(from.heap, 0, heap, 0, l);
}
// include the invocant in the positionals! it will not usually be
// this, rather a container of this
public virtual Frame InvokeMethod(Frame caller, string name,
Variable[] pos, VarHash named)
{
DispatchEnt m;
//Kernel.LogNameLookup(name);
if ((m = mo.FindMethod(name)) != null)
{
return(m.info.SetupCall(caller, m.outer, m.ip6,
pos, named, false, m));
}
if (mo.mro_methods.TryGetValue("FALLBACK", out m))
{
Variable[] npos = new Variable[pos.Length + 1];
Array.Copy(pos, 1, npos, 2, pos.Length - 1);
npos[0] = pos[0];
npos[1] = Kernel.BoxAnyMO(name, Kernel.StrMO);
return(m.info.SetupCall(caller, m.outer, m.ip6,
npos, named, false, m));
}
return(Fail(caller, "Unable to resolve method " + name));
}
public abstract Frame Invoke(P6any obj, Frame th, Variable[] pos, VarHash named);
public Frame Invoke(Frame c, Variable[] p, VarHash n)
{
return(mo.mro_INVOKE.Invoke(this, c, p, n));
}
internal VarHashKeys(VarHash x)
{
th = x;
}
public abstract bool Admissable(Frame th, Variable[] pos, VarHash named);
