There are too many ways to configure a bson.Encoder and bson.Decoder to get the exact same behavior. We're planning to remove all usages of the EncodeContext and DecodeContext from the standard user configuration of the bson.Encoder and bson.Decoder types. All configuration will be done via the configuration methods on the bson.Encoder and bson.Decoder types.

Definition of done:

• Deprecate the bson.NewEncoderWithContext and Encoder.SetContext functions. Recommend using the Encoder configuration methods set the desired behavior of the encoder instead.
• Deprecate the bson.NewDecoderWithContext and Decoder.SetContext functions. Recommend using the Decoder configuration methods set the desired behavior of the decoder instead.