public ConstructorBinding(Type type, PyType typeToCreate, ConstructorBinder ctorBinder)
{
this.type = type;
this.typeToCreate = typeToCreate;
this.ctorBinder = ctorBinder;
repr = IntPtr.Zero;
}
public PythonException(PyType type, PyObject?value, PyObject?traceback,
string message, Exception?innerException)
: base(message, innerException)
{
Type = type ?? throw new ArgumentNullException(nameof(type));
Value = value;
Traceback = traceback;
}
public BoundContructor(Type type, PyType typeToCreate, ConstructorBinder ctorBinder, ConstructorInfo ci)
{
this.type = type;
this.typeToCreate = typeToCreate;
this.ctorBinder = ctorBinder;
ctorInfo = ci;
repr = IntPtr.Zero;
}
internal static BorrowedReference GetUnmanagedBaseType(BorrowedReference managedType)
{
Debug.Assert(managedType != null && IsManagedType(managedType));
do
{
managedType = PyType.GetBase(managedType);
} while (IsManagedType(managedType));
return(managedType);
}
/// <summary>
/// Given a Python object, return the associated managed object or null.
/// </summary>
internal static ManagedType?GetManagedObject(BorrowedReference ob)
{
if (ob != null)
{
BorrowedReference tp = Runtime.PyObject_TYPE(ob);
var flags = PyType.GetFlags(tp);
if ((flags & TypeFlags.HasClrInstance) != 0)
{
var gc = TryGetGCHandle(ob, tp);
return((ManagedType?)gc?.Target);
}
}
return(null);
}
private static Exception FromPyErr(BorrowedReference typeRef, BorrowedReference valRef, BorrowedReference tbRef,
out ExceptionDispatchInfo?exceptionDispatchInfo)
{
if (valRef == null)
{
throw new ArgumentNullException(nameof(valRef));
}
var type = PyType.FromReference(typeRef);
var value = new PyObject(valRef);
var traceback = PyObject.FromNullableReference(tbRef);
exceptionDispatchInfo = TryGetDispatchInfo(valRef);
if (exceptionDispatchInfo != null)
{
return(exceptionDispatchInfo.SourceException);
}
if (ManagedType.GetManagedObject(valRef) is CLRObject {
inst : Exception e
})
static Converter.TryConvertFromPythonDelegate GetDecoder(IntPtr sourceType, Type targetType)
{
IPyObjectDecoder decoder;
var sourceTypeRef = new BorrowedReference(sourceType);
Debug.Assert(PyType.IsType(sourceTypeRef));
using (var pyType = new PyType(sourceTypeRef, prevalidated: true))
{
lock (decoders)
{
decoder = decoders.GetDecoder(pyType, targetType);
if (decoder == null)
{
return(null);
}
}
}
var decode = genericDecode.MakeGenericMethod(targetType);
bool TryDecode(IntPtr pyHandle, out object result)
{
var pyObj = new PyObject(Runtime.SelfIncRef(pyHandle));
var @params = new object[] { pyObj, null };
bool success = (bool)decode.Invoke(decoder, @params);
if (!success)
{
pyObj.Dispose();
}
result = @params[1];
return(success);
}
return(TryDecode);
}
internal PyType(PyType o)
: base(o is not null ? o.Reference : throw new ArgumentNullException(nameof(o)))
/// <summary>
/// Metatype initialization. This bootstraps the CLR metatype to life.
/// </summary>
public static PyType Initialize()
{
PyCLRMetaType = TypeManager.CreateMetaType(typeof(MetaType), out _metaSlotsHodler);
return(PyCLRMetaType);
}
public PythonException(PyType type, PyObject?value, PyObject?traceback)
: this(type, value, traceback, innerException : null)
{
}
public PythonException(PyType type, PyObject?value, PyObject?traceback,
Exception?innerException)
: this(type, value, traceback, GetMessage(value, type), innerException)
{
}
private static void InitClassBase(Type type, ClassBase impl, PyType pyType)
{
// First, we introspect the managed type and build some class
// information, including generating the member descriptors
// that we'll be putting in the Python class __dict__.
ClassInfo info = GetClassInfo(type);
impl.indexer = info.indexer;
impl.richcompare = new Dictionary <int, MethodObject>();
// Now we force initialize the Python type object to reflect the given
// managed type, filling the Python type slots with thunks that
// point to the managed methods providing the implementation.
TypeManager.GetOrInitializeClass(impl, type);
// Finally, initialize the class __dict__ and return the object.
using var dict = Runtime.PyObject_GenericGetDict(pyType.Reference);
if (impl.dotNetMembers == null)
{
impl.dotNetMembers = new List <string>();
}
IDictionaryEnumerator iter = info.members.GetEnumerator();
while (iter.MoveNext())
{
var item = (ManagedType)iter.Value;
var name = (string)iter.Key;
impl.dotNetMembers.Add(name);
Runtime.PyDict_SetItemString(dict, name, item.ObjectReference);
// Decref the item now that it's been used.
item.DecrRefCount();
if (ClassBase.CilToPyOpMap.TryGetValue(name, out var pyOp))
{
impl.richcompare.Add(pyOp, (MethodObject)item);
}
}
// If class has constructors, generate an __doc__ attribute.
NewReference doc = default;
Type marker = typeof(DocStringAttribute);
var attrs = (Attribute[])type.GetCustomAttributes(marker, false);
if (attrs.Length != 0)
{
var attr = (DocStringAttribute)attrs[0];
string docStr = attr.DocString;
doc = NewReference.DangerousFromPointer(Runtime.PyString_FromString(docStr));
Runtime.PyDict_SetItem(dict, PyIdentifier.__doc__, doc);
}
var co = impl as ClassObject;
// If this is a ClassObject AND it has constructors, generate a __doc__ attribute.
// required that the ClassObject.ctors be changed to internal
if (co != null)
{
if (co.NumCtors > 0)
{
// Implement Overloads on the class object
if (!CLRModule._SuppressOverloads)
{
var ctors = new ConstructorBinding(type, pyType, co.binder);
// ExtensionType types are untracked, so don't Incref() them.
// TODO: deprecate __overloads__ soon...
Runtime.PyDict_SetItem(dict, PyIdentifier.__overloads__, ctors.ObjectReference);
Runtime.PyDict_SetItem(dict, PyIdentifier.Overloads, ctors.ObjectReference);
ctors.DecrRefCount();
}
// don't generate the docstring if one was already set from a DocStringAttribute.
if (!CLRModule._SuppressDocs && doc.IsNull())
{
doc = co.GetDocString();
Runtime.PyDict_SetItem(dict, PyIdentifier.__doc__, doc);
}
}
}
doc.Dispose();
// The type has been modified after PyType_Ready has been called
// Refresh the type
Runtime.PyType_Modified(pyType.Reference);
}
internal static bool IsManagedType(BorrowedReference type)
{
var flags = PyType.GetFlags(type);
return((flags & TypeFlags.HasClrInstance) != 0);
}
