Nothing
assert_scalar <- function(x, name = deparse(substitute(x))) {
if (length(x) != 1) {
stop(sprintf("'%s' must be a scalar", name), call. = FALSE)
}
}
assert_character <- function(x, name = deparse(substitute(x))) {
if (!is.character(x)) {
stop(sprintf("'%s' must be character", name), call. = FALSE)
}
}
assert_numeric <- function(x, name = deparse(substitute(x))) {
if (!is.numeric(x)) {
stop(sprintf("'%s' must be numeric", name), call. = FALSE)
}
}
assert_logical <- function(x, name = deparse(substitute(x))) {
if (!is.logical(x)) {
stop(sprintf("'%s' must be logical", name), call. = FALSE)
}
}
assert_hash <- function(x, name = deparse(substitute(x))) {
if (!all(grepl("^[[:xdigit:]]{32}$", x))) {
stop(sprintf("'%s' must be a hash", name), call. = FALSE)
}
}
assert_scalar_logical <- function(x, name = deparse(substitute(x))) {
assert_scalar(x, name)
assert_logical(x, name)
}
assert_scalar_numeric <- function(x, name = deparse(substitute(x))) {
assert_scalar(x, name)
assert_numeric(x, name)
}
assert_scalar_character <- function(x, name = deparse(substitute(x))) {
assert_scalar(x, name)
assert_character(x, name)
}
assert_named <- function(x, unique = FALSE, name = deparse(substitute(x))) {
if (is.null(names(x))) {
stop(sprintf("'%s' must be named", name), call. = FALSE)
}
if (unique && any(duplicated(names(x)))) {
stop(sprintf("'%s' must have unique names", name), call. = FALSE)
}
}
assert_is <- function(x, what, name = deparse(substitute(x))) {
if (!inherits(x, what)) {
stop(sprintf("'%s' must be a %s", name,
paste(what, collapse = " / ")), call. = FALSE)
}
}
assert_file_exists <- function(x, check_case = TRUE, workdir = NULL,
name = "File") {
err <- !file_exists(x, check_case = check_case, workdir = workdir)
if (any(err)) {
i <- attr(err, "incorrect_case")
if (!is.null(i)) {
msg_case <- x[i]
msg_totally <- x[err & !i]
if (length(msg_case) > 0L) {
correct_case <- attr(err, "correct_case")
msg_case <- sprintf("'%s' (should be '%s')",
names(correct_case), correct_case)
}
msg <- c(msg_case, squote(msg_totally))
} else {
msg <- squote(x[err])
}
stop(sprintf("%s does not exist: %s", name, paste(msg, collapse = ", ")),
call. = FALSE)
}
}
assert_is_directory <- function(x, check_case = TRUE, workdir = NULL,
name = "File") {
assert_file_exists(x, check_case, workdir, name)
path <- if (is.null(workdir)) x else file.path(workdir, x)
if (!is_directory(path)) {
stop(sprintf("%s exists but is not a directory: %s",
name, paste(x, collapse = ", ")),
call. = FALSE)
}
}
match_value <- function(arg, choices, name = deparse(substitute(arg))) {
assert_scalar_character(arg)
if (!(arg %in% choices)) {
stop(sprintf("%s must be one of %s",
name, paste(squote(choices), collapse = ", ")),
call. = FALSE)
}
arg
}
assert_type <- function(x, type, name = deparse(substitute(x))) {
switch(type,
logical = assert_scalar_logical(x, name),
numeric = assert_scalar_numeric(x, name),
character = assert_scalar_character(x, name))
}
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