private bool DoesTypeHaveNonNullableContext(Type type, NonNullabilityConventionState state)
{
if (state.TypeCache.TryGetValue(type, out var cachedTypeNonNullable))
{
return(cachedTypeNonNullable);
}
if (Attribute.GetCustomAttributes(type)
.FirstOrDefault(a => a.GetType().FullName == NullableContextAttributeFullName) is Attribute contextAttr)
{
var attributeType = contextAttr.GetType();
if (attributeType != state.NullableContextAttrType)
{
state.NullableContextFlagFieldInfo = attributeType.GetField("Flag");
state.NullableContextAttrType = attributeType;
}
if (state.NullableContextFlagFieldInfo?.GetValue(contextAttr) is byte flag)
{
return(state.TypeCache[type] = flag == 1);
}
}
else if (type.IsNested)
{
return(state.TypeCache[type] = DoesTypeHaveNonNullableContext(type.DeclaringType !, state));
}
return(state.TypeCache[type] = false);
}
private byte?GetNullabilityContextFlag(NonNullabilityConventionState state, Attribute[] attributes)
{
if (attributes.FirstOrDefault(a => a.GetType().FullName == NullableContextAttributeFullName) is Attribute attribute)
{
var attributeType = attribute.GetType();
if (attributeType != state.NullableContextAttrType)
{
state.NullableContextFlagFieldInfo = attributeType.GetField("Flag");
state.NullableContextAttrType = attributeType;
}
if (state.NullableContextFlagFieldInfo?.GetValue(attribute) is byte flag)
{
return(flag);
}
}
return(null);
}
