diff --git a/R/internals.R b/R/internals.R
index 4856c41..9adeb32 100644
--- a/R/internals.R
+++ b/R/internals.R
@@ -1,15 +1,39 @@
 # not in
+#' Not In Operator
+#'
+#' A negation of the `%in%` operator that tests if elements of `a` are not in `b`.
+#'
+#' @param a Vector or value to test
+#' @param b Vector to test against
+#'
+#' @return Logical vector with TRUE for elements of `a` that are not in `b`
 `%notin%` <- function(a, b) {
   !(a %in% b)
 }
 
 # not all in
+#' Not All In Operator
+#'
+#' Tests if not all elements of `a` are contained in `b`.
+#'
+#' @param a Vector to test
+#' @param b Vector to test against
+#'
+#' @return TRUE if at least one element of `a` is not in `b`, otherwise FALSE
 `%notallin%` <- function(a, b) {
   !(all(a %in% b))
 }
 
 # infix for null replacement
 #' @importFrom rlang `%||%`
+#' If Null Replace Operator
+#'
+#' An alias for the `%||%` operator that returns `a` if it's not NULL, otherwise returns `b`.
+#'
+#' @param a First value to test
+#' @param b Value to use if `a` is NULL
+#'
+#' @return `a` if not NULL, otherwise `b`
 `%ifnullrep%` <- function(a, b) {
   a %||% b
 }