@@ -9,6 +9,12 @@
 namespace Python.Runtime
 {
     using MaybeMethodBase = MaybeMethodBase<MethodBase>;
+
+    public delegate void MethodBinderCoerceBindDelegate(
+        Dictionary<string, PyObject> arguments,
+        MethodBase[] methods,
+        ref MethodBase? foundBinding);
+
     /// <summary>
     /// A MethodBinder encapsulates information about a (possibly overloaded)
     /// managed method, and is responsible for selecting the right method given
@@ -516,7 +522,7 @@ public MismatchedMethod(Exception exception, MethodBase mb)
                     }
                 }
 
-                return new Binding(mi, target, margs, outs);
+                return CoerceResult(new Binding(mi, target, margs, outs));
             }
             else if (matchGenerics && isGeneric)
             {
@@ -528,7 +534,7 @@ public MismatchedMethod(Exception exception, MethodBase mb)
                 MethodInfo[] overloads = MatchParameters(methods, types);
                 if (overloads.Length != 0)
                 {
-                    return Bind(inst, args, kwargDict, overloads, matchGenerics: false);
+                    return CoerceResult(Bind(inst, args, kwargDict, overloads, matchGenerics: false));
                 }
             }
             if (mismatchedMethods.Count > 0)
@@ -537,6 +543,19 @@ public MismatchedMethod(Exception exception, MethodBase mb)
                 Exceptions.SetError(aggregateException);
             }
             return null;
+
+            Binding? CoerceResult(Binding? binding)
+            {
+                if (binding is not null)
+                {
+                    var foundMethod = binding.info;
+                    MethodBinderEvents.CoerceBind?.Invoke(kwargDict, methods, ref foundMethod);
+                    if (foundMethod is null)
+                        return null;
+                }
+
+                return binding;
+            }
         }
 
         static AggregateException GetAggregateException(IEnumerable<MismatchedMethod> mismatchedMethods)
@@ -1068,4 +1087,9 @@ static internal class ParameterInfoExtensions
             }
         }
     }
+
+    public static class MethodBinderEvents
+    {
+        public static MethodBinderCoerceBindDelegate? CoerceBind;
+    }
 }
Original file line number	Diff line number	Diff line change
@@ -9,6 +9,12 @@
9	9	namespace Python.Runtime
10	10	{
11	11	using MaybeMethodBase = MaybeMethodBase<MethodBase>;
	12	+
	13	+ public delegate void MethodBinderCoerceBindDelegate(
	14	+ Dictionary<string, PyObject> arguments,
	15	+ MethodBase[] methods,
	16	+ ref MethodBase? foundBinding);
	17	+
12	18	/// <summary>
13	19	/// A MethodBinder encapsulates information about a (possibly overloaded)
14	20	/// managed method, and is responsible for selecting the right method given
@@ -516,7 +522,7 @@ public MismatchedMethod(Exception exception, MethodBase mb)
516	522	}
517	523	}
518	524
519		- return new Binding(mi, target, margs, outs);
	525	+ return CoerceResult(new Binding(mi, target, margs, outs));
520	526	}
521	527	else if (matchGenerics && isGeneric)
522	528	{
@@ -528,7 +534,7 @@ public MismatchedMethod(Exception exception, MethodBase mb)
528	534	MethodInfo[] overloads = MatchParameters(methods, types);
529	535	if (overloads.Length != 0)
530	536	{
531		- return Bind(inst, args, kwargDict, overloads, matchGenerics: false);
	537	+ return CoerceResult(Bind(inst, args, kwargDict, overloads, matchGenerics: false));
532	538	}
533	539	}
534	540	if (mismatchedMethods.Count > 0)
@@ -537,6 +543,19 @@ public MismatchedMethod(Exception exception, MethodBase mb)
537	543	Exceptions.SetError(aggregateException);
538	544	}
539	545	return null;
	546	+
	547	+ Binding? CoerceResult(Binding? binding)
	548	+ {
	549	+ if (binding is not null)
	550	+ {
	551	+ var foundMethod = binding.info;
	552	+ MethodBinderEvents.CoerceBind?.Invoke(kwargDict, methods, ref foundMethod);
	553	+ if (foundMethod is null)
	554	+ return null;
	555	+ }
	556	+
	557	+ return binding;
	558	+ }
540	559	}
541	560
542	561	static AggregateException GetAggregateException(IEnumerable<MismatchedMethod> mismatchedMethods)
@@ -1068,4 +1087,9 @@ static internal class ParameterInfoExtensions
1068	1087	}
1069	1088	}
1070	1089	}
	1090	+
	1091	+ public static class MethodBinderEvents
	1092	+ {
	1093	+ public static MethodBinderCoerceBindDelegate? CoerceBind;
	1094	+ }
1071	1095	}