diff --git a/R/support.R b/R/support.R
index d0c3d8fb..a0cfe6dc 100644
--- a/R/support.R
+++ b/R/support.R
@@ -4,7 +4,7 @@
 #' @param limits A list of value limits for the distribution.
 #' @param closed A list of logical(2L) indicating whether the limits are closed.
 #'
-new_support_region <- function(x, limits = NULL, closed = list(c(TRUE, TRUE))) {
+new_support_region <- function(x = numeric(), limits = list(), closed = list()) {
   vctrs::new_rcrd(list(x = x, lim = limits, closed = closed), class = "support_region")
 }
 
@@ -28,12 +28,13 @@ format.support_region <- function(x, digits = 3, ...) {
     br2 <- brackets[[2]][closed[2] + 1L]
     fz <- sapply(z, function(x) format(x, digits = digits))
     fz <- gsub("3.14", "pi", fz, fixed = TRUE)
-    if(any(is.na(z)) || all(is.infinite(z))) type
-    else if (type == "Z" && identical(z[2], Inf)) {
-      if(z[1] == 0L) "N0" else if (z[1] == 1L) "N+" else paste0(br1, z[1], ",", z[1]+1L, ",...,", z[2], br2)
+    if (any(is.na(z)) || all(is.infinite(z))) type
+    else if (type == "Z") {
+      if (identical(z, c(0L, Inf))) "N0"
+      else if (identical(z, c(1L, Inf))) "N+"
+      else paste0("{", z[1], ",", z[1]+1L, ",...,", z[2], "}")
     }
     else if (type == "R") paste0(br1, fz[1], ",", fz[2], br2)
-    else if (type == "Z") paste0(br1, z[1], ",", z[1]+1L, ",...,", z[2], br2)
     else type
   }, type, field(x, "lim"), field(x, "closed"))
 }
diff --git a/R/transformed.R b/R/transformed.R
index d25e7577..c052d08b 100755
--- a/R/transformed.R
+++ b/R/transformed.R
@@ -41,7 +41,7 @@ format.dist_transformed <- function(x, ...){
 support.dist_transformed <- function(x, ...) {
   support <- support(x[["dist"]])
   lim <- field(support, "lim")[[1]]
-  lim <- SW(x[['transform']](lim))
+  lim <- suppressWarnings(x[['transform']](lim))
   if (all(!is.na(lim))) {
     lim <- sort(lim)
   }
@@ -51,22 +51,22 @@ support.dist_transformed <- function(x, ...) {
 
 #' @export
 density.dist_transformed <- function(x, at, ...){
-  inv <- function(v) SW(x[["inverse"]](v))
+  inv <- function(v) suppressWarnings(x[["inverse"]](v))
   jacobian <- vapply(at, numDeriv::jacobian, numeric(1L), func = inv)
   d <- density(x[["dist"]], inv(at)) * abs(jacobian)
   limits <- field(support(x), "lim")[[1]]
   closed <- field(support(x), "closed")[[1]]
   if (!any(is.na(limits))) {
-    `%op1%` <- if (closed[1]) `<` else `<=`
-    `%op2%` <- if (closed[2]) `>` else `>=`
-    d[which(at %op1% limits[1] | at %op2% limits[2])] <- 0
+    `%less_than%` <- if (closed[1]) `<` else `<=`
+    `%greater_than%` <- if (closed[2]) `>` else `>=`
+    d[which(at %less_than% limits[1] | at %greater_than% limits[2])] <- 0
   }
   d
 }
 
 #' @export
 cdf.dist_transformed <- function(x, q, ...){
-  inv <- function(v) SW(x[["inverse"]](v))
+  inv <- function(v) suppressWarnings(x[["inverse"]](v))
   p <- cdf(x[["dist"]], inv(q), ...)
   limits <- field(support(x), "lim")[[1]]
   if (!any(is.na(limits))) {
diff --git a/R/utils.R b/R/utils.R
index e5040fd0..9117e186 100644
--- a/R/utils.R
+++ b/R/utils.R
@@ -153,7 +153,3 @@ near <- function(x, y) {
   tol <- .Machine$double.eps^0.5
   abs(x - y) < tol
 }
-
-SW <- function(x) {
-  suppressWarnings(x)
-}