/// <summary>
/// Implement explicit overload selection using subscript syntax ([]).
/// </summary>
public static IntPtr mp_subscript(IntPtr tp, IntPtr idx)
{
var self = (OverloadMapper)GetManagedObject(tp);
// Note: if the type provides a non-generic method with N args
// and a generic method that takes N params, then we always
// prefer the non-generic version in doing overload selection.
Type[] types = Runtime.PythonArgsToTypeArray(idx);
if (types == null)
{
return(Exceptions.RaiseTypeError("type(s) expected"));
}
MethodInfo mi = MethodBinder.MatchSignature(self.m.info, types);
if (mi == null)
{
var e = "No match found for signature";
return(Exceptions.RaiseTypeError(e));
}
var mb = new MethodBinding(self.m, self.target)
{
info = mi
};
return(mb.pyHandle);
}
int IComparer.Compare(object m1, object m2)
{
var me1 = (MethodBase)m1;
var me2 = (MethodBase)m2;
if (me1.DeclaringType != me2.DeclaringType)
{
// m2's type derives from m1's type, favor m2
if (me1.DeclaringType.IsAssignableFrom(me2.DeclaringType))
{
return(1);
}
// m1's type derives from m2's type, favor m1
if (me2.DeclaringType.IsAssignableFrom(me1.DeclaringType))
{
return(-1);
}
}
int p1 = MethodBinder.GetPrecedence((MethodBase)m1);
int p2 = MethodBinder.GetPrecedence((MethodBase)m2);
if (p1 < p2)
{
return(-1);
}
if (p1 > p2)
{
return(1);
}
return(0);
}
private void _MethodObject(Type type, string name, MethodInfo[] info)
{
this.type = type;
this.name = name;
this.info = info;
binder = new MethodBinder();
foreach (MethodInfo item in info)
{
binder.AddMethod(item);
if (item.IsStatic)
{
this.is_static = true;
}
}
}
/// <summary>
/// This is a hack. Generally, no managed class is considered callable
/// from Python - with the exception of System.Delegate. It is useful
/// to be able to call a System.Delegate instance directly, especially
/// when working with multicast delegates.
/// </summary>
public static IntPtr tp_call(IntPtr ob, IntPtr args, IntPtr kw)
{
//ManagedType self = GetManagedObject(ob);
IntPtr tp = Runtime.PyObject_TYPE(ob);
var cb = (ClassBase)GetManagedObject(tp);
if (cb.type != typeof(Delegate))
{
Exceptions.SetError(Exceptions.TypeError, "object is not callable");
return(IntPtr.Zero);
}
var co = (CLRObject)GetManagedObject(ob);
var d = co.inst as Delegate;
BindingFlags flags = BindingFlags.Public |
BindingFlags.NonPublic |
BindingFlags.Instance |
BindingFlags.Static;
MethodInfo method = d.GetType().GetMethod("Invoke", flags);
var binder = new MethodBinder(method);
return(binder.Invoke(ob, args, kw));
}
/// <summary>
/// Implement binding of generic methods using the subscript syntax [].
/// </summary>
public static IntPtr mp_subscript(IntPtr tp, IntPtr idx)
{
var self = (MethodBinding)GetManagedObject(tp);
Type[] types = Runtime.PythonArgsToTypeArray(idx);
if (types == null)
{
return(Exceptions.RaiseTypeError("type(s) expected"));
}
MethodInfo mi = MethodBinder.MatchParameters(self.m.info, types);
if (mi == null)
{
return(Exceptions.RaiseTypeError("No match found for given type params"));
}
var mb = new MethodBinding(self.m, self.target)
{
info = mi
};
return(mb.pyHandle);
}
internal DelegateObject(Type tp) : base(tp)
{
binder = new MethodBinder(tp.GetMethod("Invoke"));
}
/// <summary>
/// MethodBinding __call__ implementation.
/// </summary>
public static IntPtr tp_call(IntPtr ob, IntPtr args, IntPtr kw)
{
var self = (MethodBinding)GetManagedObject(ob);
// This works around a situation where the wrong generic method is picked,
// for example this method in the tests: string Overloaded<T>(int arg1, int arg2, string arg3)
if (self.info != null)
{
if (self.info.IsGenericMethod)
{
var len = Runtime.PyTuple_Size(args); //FIXME: Never used
Type[] sigTp = Runtime.PythonArgsToTypeArray(args, true);
if (sigTp != null)
{
Type[] genericTp = self.info.GetGenericArguments();
MethodInfo betterMatch = MethodBinder.MatchSignatureAndParameters(self.m.info, genericTp, sigTp);
if (betterMatch != null)
{
self.info = betterMatch;
}
}
}
}
// This supports calling a method 'unbound', passing the instance
// as the first argument. Note that this is not supported if any
// of the overloads are static since we can't know if the intent
// was to call the static method or the unbound instance method.
var disposeList = new List <IntPtr>();
try {
IntPtr target = self.target;
if (target == IntPtr.Zero && !self.m.IsStatic())
{
var len = Runtime.PyTuple_Size(args);
if (len < 1)
{
Exceptions.SetError(Exceptions.TypeError, "not enough arguments");
return(IntPtr.Zero);
}
target = Runtime.PyTuple_GetItem(args, 0);
Runtime.XIncref(target);
disposeList.Add(target);
args = Runtime.PyTuple_GetSlice(args, 1, len);
disposeList.Add(args);
}
// if the class is a IPythonDerivedClass and target is not the same as self.targetType
// (eg if calling the base class method) then call the original base class method instead
// of the target method.
IntPtr superType = IntPtr.Zero;
if (Runtime.PyObject_TYPE(target) != self.targetType)
{
var inst = GetManagedObject(target) as CLRObject;
if (inst?.inst is IPythonDerivedType)
{
var baseType = GetManagedObject(self.targetType) as ClassBase;
if (baseType != null)
{
string baseMethodName = "_" + baseType.type.Name + "__" + self.m.name;
IntPtr baseMethod = Runtime.PyObject_GetAttrString(target, baseMethodName);
if (baseMethod != IntPtr.Zero)
{
var baseSelf = GetManagedObject(baseMethod) as MethodBinding;
if (baseSelf != null)
{
self = baseSelf;
}
Runtime.XDecref(baseMethod);
}
else
{
Runtime.PyErr_Clear();
}
}
}
}
return(self.m.Invoke(target, args, kw, self.info));
}
finally {
foreach (IntPtr ptr in disposeList)
{
Runtime.XDecref(ptr);
}
}
}
public Indexer()
{
GetterBinder = new MethodBinder();
SetterBinder = new MethodBinder();
}