Update based on Kurt's email.

DESCRIPTION

@@ -1,5 +1,5 @@
 Package: bigmemory
-Version: 4.5.33
+Version: 4.5.35
 Title: Manage Massive Matrices with Shared Memory and Memory-Mapped Files
 Author: Michael J. Kane <kaneplusplus@gmail.com>, John W. Emerson
     <jayemerson@gmail.com>, Peter Haverty <haverty.peter@gene.com>, and Charles
@@ -24,9 +24,7 @@ URL: https://github.com/kaneplusplus/bigmemory
 BugReports: https://github.com/kaneplusplus/bigmemory/issues
 LazyLoad: yes
 Biarch: yes
-VignetteBuilder: knitr
 Suggests:
-    knitr,
     testthat
-RoxygenNote: 6.0.1
+RoxygenNote: 7.0.2
 Roxygen: list(markdown = TRUE)

R/bigmemory.R

@@ -1941,7 +1941,7 @@ morder <- function(x, cols, na.last=TRUE, decreasing = FALSE) {
     stop("Bad column indices.")
   }
 
-  switch(class(x),
+  switch(class(x)[1],
     "big.matrix"=OrderBigMatrix(x@address, as.double(cols),
                                   as.integer(na.last), as.logical(decreasing) ),
     "matrix" = switch(typeof(x),
@@ -1965,7 +1965,7 @@ morderCols <- function(x, rows, na.last=TRUE, decreasing = FALSE) {
     stop("Bad row indices.")
   }
 
-  switch(class(x),
+  switch(class(x)[1],
     "big.matrix"=OrderBigMatrixCols(x@address, as.double(rows),
                                     as.integer(na.last),
                                     as.logical(decreasing) ),
@@ -2012,7 +2012,7 @@ mpermute <- function(x, order=NULL, cols=NULL, allow.duplicates=FALSE, ...)
     order <- morder(x, cols, ...)
   }
 
-  switch(class(x),
+  switch(class(x)[1],
          "big.matrix" = ReorderBigMatrix(x@address, order),
          "matrix" = switch(typeof(x),
             'integer' = ReorderRIntMatrix(x, nrow(x), ncol(x), order),
@@ -2053,7 +2053,7 @@ mpermuteCols <- function(x, order=NULL, rows=NULL,
     order <- morderCols(x, rows, ...)
   }
 
-  switch(class(x),
+  switch(class(x)[1],
     "big.matrix" = {
       ReorderBigMatrixCols(x@address, order)
       SetColumnNames(x@address, colnames(x)[order])