internal CustomAttributeValueTreatment CalculateCustomAttributeValueTreatment(CustomAttributeHandle handle)
{
Debug.Assert(_metadataKind != MetadataKind.Ecma335);
var parent = CustomAttributeTable.GetParent(handle);
// Check for Windows.Foundation.Metadata.AttributeUsageAttribute.
// WinMD rules:
// - The attribute is only applicable on TypeDefs.
// - Constructor must be a MemberRef with TypeRef.
if (!IsWindowsAttributeUsageAttribute(parent, handle))
{
return(CustomAttributeValueTreatment.None);
}
var targetTypeDef = (TypeDefinitionHandle)parent;
if (StringStream.EqualsRaw(TypeDefTable.GetNamespaceString(targetTypeDef), "Windows.Foundation.Metadata"))
{
if (StringStream.EqualsRaw(TypeDefTable.GetName(targetTypeDef), "VersionAttribute"))
{
return(CustomAttributeValueTreatment.AttributeUsageVersionAttribute);
}
if (StringStream.EqualsRaw(TypeDefTable.GetName(targetTypeDef), "DeprecatedAttribute"))
{
return(CustomAttributeValueTreatment.AttributeUsageDeprecatedAttribute);
}
}
bool allowMultiple = HasAttribute(targetTypeDef, "Windows.Foundation.Metadata", "AllowMultipleAttribute");
return(allowMultiple ? CustomAttributeValueTreatment.AttributeUsageAllowMultiple : CustomAttributeValueTreatment.AttributeUsageAllowSingle);
}
private TypeDefTreatment GetWellKnownTypeDefinitionTreatment(TypeDefinitionHandle typeDef)
{
InitializeProjectedTypes();
StringHandle name = TypeDefTable.GetName(typeDef);
int index = StringStream.BinarySearchRaw(_projectedTypeNames, name);
if (index < 0)
{
return(TypeDefTreatment.None);
}
StringHandle namespaceName = TypeDefTable.GetNamespaceString(typeDef);
if (StringStream.EqualsRaw(namespaceName, StringStream.GetVirtualValue(s_projectionInfos[index].ClrNamespace)))
{
return(s_projectionInfos[index].Treatment);
}
// TODO: we can avoid this comparison if info.DotNetNamespace == info.WinRtNamespace
if (StringStream.EqualsRaw(namespaceName, s_projectionInfos[index].WinRTNamespace))
{
return(s_projectionInfos[index].Treatment | TypeDefTreatment.MarkInternalFlag);
}
return(TypeDefTreatment.None);
}
private bool GetAttributeTypeNameRaw(CustomAttributeHandle caHandle, out StringHandle namespaceName, out StringHandle typeName)
{
namespaceName = typeName = default(StringHandle);
Handle typeDefOrRef = GetAttributeTypeRaw(caHandle);
if (typeDefOrRef.IsNil)
{
return(false);
}
if (typeDefOrRef.Kind == HandleKind.TypeReference)
{
TypeReferenceHandle typeRef = (TypeReferenceHandle)typeDefOrRef;
var resolutionScope = TypeRefTable.GetResolutionScope(typeRef);
if (!resolutionScope.IsNil && resolutionScope.Kind == HandleKind.TypeReference)
{
// we don't need to handle nested types
return(false);
}
// other resolution scopes don't affect full name
typeName = TypeRefTable.GetName(typeRef);
namespaceName = TypeRefTable.GetNamespace(typeRef);
}
else if (typeDefOrRef.Kind == HandleKind.TypeDefinition)
{
TypeDefinitionHandle typeDef = (TypeDefinitionHandle)typeDefOrRef;
if (TypeDefTable.GetFlags(typeDef).IsNested())
{
// we don't need to handle nested types
return(false);
}
typeName = TypeDefTable.GetName(typeDef);
namespaceName = TypeDefTable.GetNamespaceString(typeDef);
}
else
{
// invalid metadata
return(false);
}
return(true);
}