Nothing
is_na <- function(x) {
if (length(x) != 1L) return(FALSE)
is.na(x)
}
is_false <- function(x) {
if (length(x) != 1L) return(FALSE)
x <- as.logical(x)
x <- unclass(x)
identical(FALSE, x)
}
stop_if_not <- function(...) {
res <- list(...)
for (ii in 1L:length(res)) {
res_ii <- .subset2(res, ii)
if (length(res_ii) != 1L || is.na(res_ii) || !res_ii) {
mc <- match.call()
call <- deparse(mc[[ii + 1]], width.cutoff = 60L)
if (length(call) > 1L) call <- paste(call[1L], "....")
stopf("%s is not TRUE", sQuote(call), call. = FALSE, domain = NA)
}
}
NULL
}
attached_packages <- function() {
pkgs <- search()
pkgs <- grep("^package:", pkgs, value = TRUE)
pkgs <- gsub("^package:", "", pkgs)
pkgs
}
## Adopted R.utils 2.1.0 (2015-06-15)
#' @importFrom utils capture.output
capture_output <- function(expr, envir = parent.frame(), ...) {
res <- eval({
file <- rawConnection(raw(0L), open = "w")
on.exit(close(file))
capture.output(expr, file = file)
rawToChar(rawConnectionValue(file))
}, envir = envir, enclos = baseenv())
unlist(strsplit(res, split = "\n", fixed = TRUE), use.names = FALSE)
}
printf <- function(...) cat(sprintf(...))
now <- function(x = Sys.time(), format = "[%H:%M:%OS3] ") {
## format(x, format = format) ## slower
format(as.POSIXlt(x, tz = ""), format = format)
}
mdebug <- function(..., debug = getOption("future.debug", FALSE)) {
if (!debug) return()
message(now(), ...)
}
mdebugf <- function(..., appendLF = TRUE,
debug = getOption("future.debug", FALSE)) {
if (!debug) return()
message(now(), sprintf(...), appendLF = appendLF)
}
#' @importFrom utils capture.output
mprint <- function(..., appendLF = TRUE, debug = getOption("future.debug", FALSE)) {
if (!debug) return()
message(paste(now(), capture.output(print(...)), sep = "", collapse = "\n"), appendLF = appendLF)
}
#' @importFrom utils capture.output str
mstr <- function(..., appendLF = TRUE, debug = getOption("future.debug", FALSE)) {
if (!debug) return()
message(paste(now(), capture.output(str(...)), sep = "", collapse = "\n"), appendLF = appendLF)
}
## From R.utils 2.0.2 (2015-05-23)
hpaste <- function(..., sep="", collapse=", ", last_collapse=NULL,
max_head=if (missing(last_collapse)) 3 else Inf,
max_tail=if (is.finite(max_head)) 1 else Inf,
abbreviate="...") {
max_head <- as.double(max_head)
max_tail <- as.double(max_tail)
if (is.null(last_collapse)) last_collapse <- collapse
# Build vector 'x'
x <- paste(..., sep = sep)
n <- length(x)
# Nothing todo?
if (n == 0) return(x)
if (is.null(collapse)) return(x)
# Abbreviate?
if (n > max_head + max_tail + 1) {
head <- x[seq_len(max_head)]
tail <- rev(rev(x)[seq_len(max_tail)])
x <- c(head, abbreviate, tail)
n <- length(x)
}
if (!is.null(collapse) && n > 1) {
if (last_collapse == collapse) {
x <- paste(x, collapse = collapse)
} else {
x_head <- paste(x[1:(n - 1)], collapse = collapse)
x <- paste(x_head, x[n], sep = last_collapse)
}
}
x
}
## Adopted from R.oo 1.19.0 (2015-06-15)
trim <- function(x, ...) {
sub("[\t\n\f\r ]*$", "", sub("^[\t\n\f\r ]*", "", x))
}
comma <- function(x, sep = ", ") paste(x, collapse = sep)
commaq <- function(x, sep = ", ") paste(sQuote(x), collapse = sep)
## Evaluates an expression in global environment.
## Because geval() is exported, we want to keep its environment()
## as small as possible, which is why we use local(). Without,
## the environment would be that of the package itself and all of
## the package would be exported.
geval <- local(function(expr, substitute = FALSE, envir = .GlobalEnv, enclos = baseenv(), ...) {
if (substitute) expr <- substitute(expr)
eval(expr, envir = envir, enclos = enclos)
})
## Tests if the current OS is of a certain type
is_os <- function(name) {
if (name == "windows") {
return(.Platform$OS.type == "windows")
} else {
grepl(paste0("^", name), R.version$os)
}
}
## From R.utils 2.5.0
tempvar <- function(prefix = "var", value = NA, envir = parent.frame()) {
max_tries <- 1e6
max_int <- .Machine$integer.max
ii <- 0L
while (ii < max_tries) {
# Generate random variable name
idx <- sample.int(max_int, size = 1L)
name <- sprintf("%s%d", prefix, idx)
# Available?
if (!exists(name, envir = envir, inherits = FALSE)) {
assign(name, value, envir = envir, inherits = FALSE)
return(name)
}
ii <- ii + 1L
}
# Failed to find a unique temporary variable name
stopf("Failed to generate a unique non-existing temporary variable with prefix '%s'", prefix) #nolint
}
result_has_errors <- function(result) {
stop_if_not(inherits(result, "FutureResult"))
for (c in result$conditions) {
if (inherits(c$condition, "error")) return(TRUE)
}
FALSE
}
#' @importFrom utils file_test
file_info <- function(file) {
if (is.null(file) || is.na(file)) return("<NA>")
if (file_test("-f", file)) {
info <- sprintf("%d bytes", file.info(file)$size)
n <- length(readLines(file, warn = FALSE))
info <- sprintf("%s; %d lines", info, n)
} else {
info <- "<non-existing>"
}
sprintf("%s (%s)", sQuote(file), info)
}
assert_no_positional_args_but_first <- function(call = sys.call(sys.parent())) {
ast <- as.list(call)
if (length(ast) <= 2L) return()
ast <- ast[-(1:2)]
dots <- vapply(ast, FUN = identical, as.symbol("..."), FUN.VALUE = FALSE)
ast <- ast[!dots]
if (length(ast) == 0L) return()
names <- names(ast)
if (is.null(names) || any(names == "")) {
stopf("Function %s() requires that all arguments beyond the first one are passed by name and not by position: %s", as.character(call[[1L]]), deparse(call, width.cutoff = 100L))
}
}
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