Nullability LoadNullabilityConstraint()
{
if (!module.ShouldDecodeNullableAttributes(Owner))
{
return(Nullability.Oblivious);
}
var metadata = module.metadata;
var gp = metadata.GetGenericParameter(handle);
foreach (var handle in gp.GetCustomAttributes())
{
var customAttribute = metadata.GetCustomAttribute(handle);
if (customAttribute.IsKnownAttribute(metadata, KnownAttribute.Nullable))
{
var attrVal = customAttribute.DecodeValue(module.TypeProvider);
if (attrVal.FixedArguments.Length == 1)
{
if (attrVal.FixedArguments[0].Value is byte b && b <= 2)
{
return((Nullability)b);
}
}
}
}
if (Owner is MetadataMethod method)
{
return(method.NullableContext);
}
else if (Owner is ITypeDefinition td)
{
return(td.NullableContext);
}
else
{
return(Nullability.Oblivious);
}
}