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);
}
void WritebackRefs(Variable[] pos, object[] argv)
{
for (int i = 0; i < args.Length; i++)
{
if (refs[i])
{
pos[i].Store(CLRWrapperProvider.BoxResult(args[i],
argv[i]).Fetch());
}
}
}
public override P6any Fetch()
{
if (!prop.CanRead)
{
throw new NieczaException("Property " + prop.Name + " is write-only");
}
MethodInfo mi = prop.GetGetMethod();
object ret = mi.Invoke(obj, argv);
return(CLRWrapperProvider.BoxResult(mi.ReturnType, ret).Fetch());
}
public override void Store(P6any v)
{
if (field.IsInitOnly || field.IsLiteral)
{
throw new NieczaException("Field " + field.Name + " is read-only");
}
object clr;
if (!CLRWrapperProvider.CoerceArgument(out clr, field.FieldType,
Kernel.NewROScalar(v)))
{
throw new NieczaException("Unable to coerce value of type " + v.mo.name + " for " + field.Name); // could also be a range problem
}
field.SetValue(obj, clr);
}
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 override void Store(P6any v)
{
if (!prop.CanWrite)
{
throw new NieczaException("Property " + prop.Name + " is read-only");
}
MethodInfo mi = prop.GetSetMethod();
object[] argv_ = argv;
Array.Resize(ref argv_, argv.Length + 1);
if (!CLRWrapperProvider.CoerceArgument(out argv_[argv.Length],
prop.PropertyType, Kernel.NewROScalar(v)))
{
throw new NieczaException("Unable to coerce value of type " + v.mo.name + " for " + prop.Name); // could also be a range problem
}
mi.Invoke(obj, argv_);
}
public override P6any Fetch()
{
object ret = field.GetValue(obj);
return(CLRWrapperProvider.BoxResult(field.FieldType, ret).Fetch());
}
