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Implement coerce logic for net method binding by generalloki · Pull Request #2590 · pythonnet/pythonnet · GitHub
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Implement coerce logic for net method binding #2590

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Implement coerce logic for net method binding #2590

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0af0a52
MethodBinderEvents.CoerceBind
generalloki May 6, 2025
64d06ab
Update MethodBinder.cs
generalloki May 6, 2025
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MethodBinderEvents.CoerceBind
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@generalloki @filmor
generalloki authored and filmor committed May 6, 2026
commit 0af0a5230d34a9057641553083458d96fb32e24c
28 changes: 26 additions & 2 deletions src/runtime/MethodBinder.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -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
Expand Down Expand Up @@ -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)
{
Expand All @@ -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)
Expand All @@ -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)
Expand Down Expand Up @@ -1068,4 +1087,9 @@ static internal class ParameterInfoExtensions
}
}
}

public static class MethodBinderEvents
{
public static MethodBinderCoerceBindDelegate? CoerceBind;
}
}