thisisnic commented on code in PR #50525:
URL: https://github.com/apache/arrow/pull/50525#discussion_r3634168194
##########
r/R/util.R:
##########
@@ -30,14 +30,135 @@ oxford_paste <- function(x, conjunction = "and", quote =
TRUE, quote_symbol = '"
}
}
-assert_is <- function(object, class) {
- msg <- paste(substitute(object), "must be a", oxford_paste(class, "or"))
- assert_that(inherits(object, class), msg = msg)
+check_null <- function(x, msg = NULL, call = rlang::caller_env()) {
+ if (!is.null(x)) {
+ if (is.null(msg)) {
+ rlang::stop_input_type(
+ x,
+ what = "NULL",
+ call = call
+ )
+ } else {
+ abort(msg, call = call)
+ }
+ }
+}
+
+# copied from
https://github.com/r-lib/rlang/blob/main/R/standalone-types-check.R
+# they are not licensed.
Review Comment:
Would you mind explaining more about this - why copy them not import them,
and what do you mean by not licensed?
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