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Allow decoders affect PyObject.As<object>() #1546

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Merged
merged 1 commit into from
Sep 14, 2021
Merged

Allow decoders affect PyObject.As<object>() #1546

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25 changes: 25 additions & 0 deletions src/embed_tests/Codecs.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -373,6 +373,31 @@ from datetime import datetime

public static void AcceptsDateTime(DateTime v) {}

[Test]
public void As_Object_AffectedByDecoders()
{
var everythingElseToSelf = new EverythingElseToSelfDecoder();
PyObjectConversions.RegisterDecoder(everythingElseToSelf);

var pyObj = PythonEngine.Eval("iter");
var decoded = pyObj.As<object>();
Assert.AreSame(everythingElseToSelf, decoded);
}

public class EverythingElseToSelfDecoder : IPyObjectDecoder
{
public bool CanDecode(PyObject objectType, Type targetType)
{
return targetType.IsAssignableFrom(typeof(EverythingElseToSelfDecoder));
}

public bool TryDecode<T>(PyObject pyObj, out T value)
{
value = (T)(object)this;
return true;
}
}

class ValueErrorWrapper : Exception
{
public ValueErrorWrapper(string message) : base(message) { }
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14 changes: 2 additions & 12 deletions src/runtime/pyobject.cs
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Expand Up @@ -163,20 +163,10 @@ public object AsManagedObject(Type t)
}

/// <summary>
/// As Method
/// </summary>
/// <remarks>
/// Return a managed object of the given type, based on the
/// value of the Python object.
/// </remarks>
public T As<T>()
{
if (typeof(T) == typeof(PyObject) || typeof(T) == typeof(object))
{
return (T)(this as object);
}
return (T)AsManagedObject(typeof(T));
}
/// </summary>
public T As<T>() => (T)this.AsManagedObject(typeof(T));

internal bool IsDisposed => obj == IntPtr.Zero;

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