/// <summary>
/// Get a DefType that is the generic instantiation of an open generic type over instantiation arguments
/// This looks like a rename of GetInstantiatedType, but isn't because the corert GetInstantiatedType
/// relies on typeDef being a MetadataType, whereas this permits non-metadata types.
/// </summary>
public DefType ResolveGenericInstantiation(DefType typeDef, Instantiation arguments)
{
Debug.Assert(typeDef.Instantiation.IsNull || typeDef.Instantiation.Length == arguments.Length);
MetadataType typeAsMetadataType = typeDef as MetadataType;
if (typeAsMetadataType != null)
{
return(GetInstantiatedType(typeAsMetadataType, arguments));
}
if (_genericTypeInstances == null)
{
_genericTypeInstances = new LowLevelDictionary <GenericTypeInstanceKey, DefType>();
}
GenericTypeInstanceKey key = new GenericTypeInstanceKey(typeDef, arguments);
DefType result;
if (!_genericTypeInstances.TryGetValue(key, out result))
{
NoMetadataType nmTypeDef = (NoMetadataType)typeDef;
Debug.Assert(RuntimeAugments.IsGenericTypeDefinition(nmTypeDef.RuntimeTypeHandle));
result = new NoMetadataType(this, nmTypeDef.RuntimeTypeHandle, nmTypeDef, arguments, key.GetHashCode());
_genericTypeInstances.Add(key, result);
}
return(result.WithDebugName());
}
public TypeDesc ResolveRuntimeTypeHandle(RuntimeTypeHandle rtth)
{
TypeDesc returnedType;
if (_runtimeTypeHandleResolutionCache.TryGetValue(rtth, out returnedType))
{
return(returnedType);
}
if (rtth.Equals(CanonType.RuntimeTypeHandle))
{
returnedType = CanonType;
}
else if (rtth.Equals(UniversalCanonType.RuntimeTypeHandle))
{
returnedType = UniversalCanonType;
}
else if (RuntimeAugments.IsGenericTypeDefinition(rtth))
{
returnedType = TryGetMetadataBasedTypeFromRuntimeTypeHandle_Uncached(rtth);
if (returnedType == null)
{
unsafe
{
TypeDesc[] genericParameters = new TypeDesc[rtth.ToEETypePtr()->GenericArgumentCount];
for (int i = 0; i < genericParameters.Length; i++)
{
genericParameters[i] = GetSignatureVariable(i, false);
}
returnedType = new NoMetadataType(this, rtth, null, new Instantiation(genericParameters), rtth.GetHashCode());
}
}
}
else if (RuntimeAugments.IsGenericType(rtth))
{
RuntimeTypeHandle typeDefRuntimeTypeHandle;
RuntimeTypeHandle[] genericArgRuntimeTypeHandles;
typeDefRuntimeTypeHandle = RuntimeAugments.GetGenericInstantiation(rtth, out genericArgRuntimeTypeHandles);
DefType typeDef = (DefType)ResolveRuntimeTypeHandle(typeDefRuntimeTypeHandle);
Instantiation genericArgs = ResolveRuntimeTypeHandles(genericArgRuntimeTypeHandles);
returnedType = ResolveGenericInstantiation(typeDef, genericArgs);
}
else if (RuntimeAugments.IsArrayType(rtth))
{
RuntimeTypeHandle elementTypeHandle = RuntimeAugments.GetRelatedParameterTypeHandle(rtth);
TypeDesc elementType = ResolveRuntimeTypeHandle(elementTypeHandle);
unsafe
{
if (rtth.ToEETypePtr()->IsSzArray)
{
returnedType = GetArrayType(elementType);
}
else
{
returnedType = GetArrayType(elementType, rtth.ToEETypePtr()->ArrayRank);
}
}
}
else if (RuntimeAugments.IsUnmanagedPointerType(rtth))
{
RuntimeTypeHandle targetTypeHandle = RuntimeAugments.GetRelatedParameterTypeHandle(rtth);
TypeDesc targetType = ResolveRuntimeTypeHandle(targetTypeHandle);
returnedType = GetPointerType(targetType);
}
else if (RuntimeAugments.IsByRefType(rtth))
{
RuntimeTypeHandle targetTypeHandle = RuntimeAugments.GetRelatedParameterTypeHandle(rtth);
TypeDesc targetType = ResolveRuntimeTypeHandle(targetTypeHandle);
returnedType = GetByRefType(targetType);
}
else
{
returnedType = TryGetMetadataBasedTypeFromRuntimeTypeHandle_Uncached(rtth);
if (returnedType == null)
{
returnedType = new NoMetadataType(this, rtth, null, Instantiation.Empty, rtth.GetHashCode());
}
}
// We either retrieved an existing DefType that is already registered with the runtime
// or one that is not associated with an MethodTable yet. If it's not associated, associate it.
if (returnedType.RuntimeTypeHandle.IsNull())
{
TypeBuilderState state = returnedType.GetTypeBuilderStateIfExist();
bool skipStoringRuntimeTypeHandle = false;
// If we've already attempted to lookup and failed to retrieve this type handle, we
// may have already decided to create a new one. In that case, do not attempt to abort
// that creation process as it may have already begun the process of type creation
if (state != null && state.AttemptedAndFailedToRetrieveTypeHandle)
{
skipStoringRuntimeTypeHandle = true;
}
if (!skipStoringRuntimeTypeHandle)
{
returnedType.SetRuntimeTypeHandleUnsafe(rtth);
}
}
_runtimeTypeHandleResolutionCache.Add(rtth, returnedType);
return(returnedType.WithDebugName());
}
