private IEnumerable <(A, B)> EnumerateTuples(BsonDeserializationContext context, BsonDeserializationArgs args)
{
var reader = context.Reader;
var keyDeserializationArgs = ArgumentHelper.GetSpecificDeserializationArgs(args);
var valueDeserializationArgs = ArgumentHelper.GetSpecificDeserializationArgs(args, 1);
reader.ReadStartArray();
while (reader.ReadBsonType() != BsonType.EndOfDocument)
{
A key = default;
B value = default;
var keySet = false;
var valueSet = false;
reader.ReadStartDocument();
while (reader.ReadBsonType() != BsonType.EndOfDocument)
{
var elementName = reader.ReadName();
switch (elementName)
{
case Key:
keySet = true;
key = _keySerializer.Deserialize(context, keyDeserializationArgs);
break;
case Value:
valueSet = true;
value = _valueSerializer.Deserialize(context, valueDeserializationArgs);
break;
default:
throw new BsonSerializationException($"Unknown element name {elementName}");
}
}
reader.ReadEndDocument();
if (!keySet)
{
throw new BsonSerializationException("Missing key");
}
if (!valueSet)
{
throw new BsonSerializationException("Missing value");
}
yield return(key, value);
}
reader.ReadEndArray();
}
private static BsonDeserializationArgs GetValueDeserializationArgs(BsonDeserializationArgs args) => ArgumentHelper.GetSpecificDeserializationArgs(args, 1);
private static BsonDeserializationArgs GetItemDeserializationArgs(BsonDeserializationArgs optionArgs) => ArgumentHelper.GetSpecificDeserializationArgs(optionArgs);