Add R6 dependency

Author: gregorgorjanc

RcppTskit/DESCRIPTION

@@ -21,10 +21,9 @@ Description: Tskit enables performant storage, manipulation, and analysis
   and the `reticulate` approach.
 URL: https://github.com/highlanderlab/RcppTskit
 License: MIT + file LICENSE
-Imports: methods, Rcpp (>= 1.1.0), Rdpack, reticulate
+Imports: methods, R6, Rcpp (>= 1.1.0), reticulate
 LinkingTo: Rcpp
 Suggests: covr, spelling, testthat
-RdMacros: Rdpack
 RoxygenNote: 7.3.3
 Encoding: UTF-8
 Language: en-GB

RcppTskit/NAMESPACE

@@ -28,9 +28,9 @@ export(ts_summary_ptr)
 export(ts_time_units_ptr)
 export(ts_write_ptr)
 export(tskit_version)
+importFrom(R6,R6Class)
 importFrom(Rcpp,cppFunction)
 importFrom(Rcpp,registerPlugin)
-importFrom(Rdpack,reprompt)
 importFrom(methods,is)
 importFrom(reticulate,import)
 importFrom(reticulate,is_py_object)

RcppTskit/R/Class-TreeSequence.R

@@ -5,7 +5,7 @@
 #' The pointer does not provide direct view for users and currently there is
 #' only a limited number of methods available to summarise the tree sequence.
 #' @export
-TreeSequence <- R6::R6Class(
+TreeSequence <- R6Class(
   classname = "TreeSequence",
   public = list(
     #' @field pointer external pointer to the tree sequence

RcppTskit/R/RcppTskit-package.R

@@ -14,9 +14,9 @@
 #'
 #' @useDynLib RcppTskit, .registration = TRUE
 #' @importFrom methods is
+#' @importFrom R6 R6Class
 #' @importFrom Rcpp registerPlugin cppFunction
 #' @importFrom reticulate is_py_object import py_module_available py_require
-#' @importFrom Rdpack reprompt
 #'
 #' @examples
 #' \dontshow{# Providing the examples here so we test them via R CMD check}