Here is a list of all documented functions with links to the class documentation for each member:

- u -

• unique() : mongocxx::options::index, mongocxx::v1::indexes::options, mongocxx::v_noabi::options::index
• unwind() : mongocxx::pipeline, mongocxx::v1::pipeline, mongocxx::v_noabi::pipeline
• update() : mongocxx::model::update_many, mongocxx::model::update_one, mongocxx::options::update, mongocxx::result::update, mongocxx::v1::bulk_write::update_many, mongocxx::v1::bulk_write::update_one, mongocxx::v_noabi::model::update_many, mongocxx::v_noabi::model::update_one, mongocxx::v_noabi::options::update, mongocxx::v_noabi::result::update
• update_many() : mongocxx::collection, mongocxx::model::update_many, mongocxx::v1::bulk_write::update_many, mongocxx::v1::collection, mongocxx::v_noabi::collection, mongocxx::v_noabi::model::update_many
• update_many_options() : mongocxx::client_bulk_write::update_many_options, mongocxx::v1::client_bulk_write::update_many_options, mongocxx::v1::update_many_options
• update_many_result() : mongocxx::v1::update_many_result
• update_one() : mongocxx::collection, mongocxx::model::update_one, mongocxx::search_index_view, mongocxx::v1::bulk_write::update_one, mongocxx::v1::collection, mongocxx::v1::search_indexes, mongocxx::v_noabi::collection, mongocxx::v_noabi::model::update_one, mongocxx::v_noabi::search_index_view
• update_one_options() : mongocxx::client_bulk_write::update_one_options, mongocxx::v1::client_bulk_write::update_one_options, mongocxx::v1::update_one_options
• update_one_result() : mongocxx::v1::update_one_result
• update_results() : mongocxx::client_bulk_write::result, mongocxx::v1::client_bulk_write::result
• upload() : mongocxx::options::gridfs::upload, mongocxx::result::gridfs::upload, mongocxx::v_noabi::options::gridfs::upload, mongocxx::v_noabi::result::gridfs::upload
• upload_from_stream() : mongocxx::gridfs::bucket, mongocxx::v1::gridfs::bucket, mongocxx::v_noabi::gridfs::bucket
• upload_from_stream_with_id() : mongocxx::gridfs::bucket, mongocxx::v1::gridfs::bucket, mongocxx::v_noabi::gridfs::bucket
• upload_options() : mongocxx::v1::gridfs::upload_options
• upload_result() : mongocxx::v1::gridfs::upload_result
• uploader() : mongocxx::gridfs::uploader, mongocxx::v1::gridfs::uploader, mongocxx::v_noabi::gridfs::uploader
• upsert() : mongocxx::client_bulk_write::replace_one_options, mongocxx::client_bulk_write::update_many_options, mongocxx::client_bulk_write::update_one_options, mongocxx::model::replace_one, mongocxx::model::update_many, mongocxx::model::update_one, mongocxx::options::find_one_and_replace, mongocxx::options::find_one_and_update, mongocxx::options::replace, mongocxx::options::update, mongocxx::v1::bulk_write::replace_one, mongocxx::v1::bulk_write::update_many, mongocxx::v1::bulk_write::update_one, mongocxx::v1::client_bulk_write::replace_one_options, mongocxx::v1::client_bulk_write::update_many_options, mongocxx::v1::client_bulk_write::update_one_options, mongocxx::v1::find_one_and_replace_options, mongocxx::v1::find_one_and_update_options, mongocxx::v1::replace_one_options, mongocxx::v1::update_many_options, mongocxx::v1::update_one_options, mongocxx::v_noabi::model::replace_one, mongocxx::v_noabi::model::update_many, mongocxx::v_noabi::model::update_one, mongocxx::v_noabi::options::find_one_and_replace, mongocxx::v_noabi::options::find_one_and_update, mongocxx::v_noabi::options::replace, mongocxx::v_noabi::options::update
• upserted_count() : mongocxx::client_bulk_write::result, mongocxx::result::bulk_write, mongocxx::result::update, mongocxx::v1::bulk_write::result, mongocxx::v1::client_bulk_write::result, mongocxx::v1::update_many_result, mongocxx::v1::update_one_result, mongocxx::v_noabi::result::bulk_write, mongocxx::v_noabi::result::update
• upserted_id() : mongocxx::result::replace_one, mongocxx::result::update, mongocxx::v1::replace_one_result, mongocxx::v1::update_one_result, mongocxx::v_noabi::result::replace_one, mongocxx::v_noabi::result::update
• upserted_ids() : mongocxx::result::bulk_write, mongocxx::v1::bulk_write::result, mongocxx::v1::update_many_result, mongocxx::v_noabi::result::bulk_write
• uri() : mongocxx::client, mongocxx::uri, mongocxx::v1::client, mongocxx::v1::uri, mongocxx::v_noabi::client, mongocxx::v_noabi::uri
• username() : mongocxx::oidc_callback_params, mongocxx::uri, mongocxx::v1::oidc_callback_params, mongocxx::v1::uri, mongocxx::v_noabi::uri