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
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
#' Display last deprecation warnings
#'
#' @description
#'
#' `last_lifecycle_warnings()` returns a list of all warnings that
#' occurred during the last top-level R command, along with a
#' backtrace.
#'
#' Use `print(last_lifecycle_warnings(), simplify = level)` to control
#' the verbosity of the backtrace. The `simplify` argument supports
#' one of `"branch"` (the default), `"collapse"`, and `"none"` (in
#' increasing order of verbosity).
#'
#' @examples
#' # These examples are not run because `last_lifecycle_warnings()` does not
#' # work well within knitr and pkgdown
#' \dontrun{
#'
#' f <- function() invisible(g())
#' g <- function() list(h(), i())
#' h <- function() deprecate_warn("1.0.0", "this()")
#' i <- function() deprecate_warn("1.0.0", "that()")
#' f()
#'
#' # Print all the warnings that occurred during the last command:
#' last_lifecycle_warnings()
#'
#'
#' # By default, the backtraces are printed in their simplified form.
#' # Use `simplify` to control the verbosity:
#' print(last_lifecycle_warnings(), simplify = "none")
#' }
#' @export
last_lifecycle_warnings <- function() {
structure(
warnings_env$warnings,
class = c("lifecycle_warnings", "list")
)
}
new_deprecated_warning <- function(msg, trace, ..., footer = NULL) {
warning_cnd(
"lifecycle_warning_deprecated",
message = msg,
trace = trace,
footer = footer,
internal = list(...)
)
}
#' @export
print.lifecycle_warnings <- function(x, ...) {
local_interactive(FALSE)
print(unclass(x))
}
warnings_env <- env(empty_env())
init_warnings <- function() {
warnings_env$last_top_frame <- NULL
warnings_env$warnings <- list()
}
init_warnings()
push_warning <- function(wrn) {
current <- obj_address(sys.frame(1))
if (identical(warnings_env$last_top_frame, current)) {
warnings_env$warnings <- c(warnings_env$warnings, list(wrn))
} else {
warnings_env$last_top_frame <- current
warnings_env$warnings <- list(wrn)
}
}
# Contains unique IDs of deprecated features so we don't warn multiple times
deprecation_env <- env(empty_env())
|
