1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
# Wrap an old-style cache so that the external API is consistent with that from
# the cache package.
#' @importFrom cachem key_missing
wrap_old_cache <- function(x) {
if (!is_old_cache(x)) {
stop("`x` must be an old-style cache.", call. = FALSE)
}
list(
digest = x$digest,
reset = x$reset,
set = x$set,
get = function(key) {
if (!x$has_key(key)) {
return(key_missing())
}
x$get(key)
},
exists = x$has_key,
remove = x$drop_key,
keys = x$keys
)
}
# Returns TRUE if it's an old-style cache.
is_old_cache <- function(x) {
is.function(x$digest) &&
is.function(x$set) &&
is.function(x$get) &&
is.function(x$has_key)
}
|
