Standardized response to input check

This function provides a standardized response to input checks, ensuring consistency.

Usage

input_check_response(
  check,
  var_name = NULL,
  error = TRUE,
  prefix = "Input {.var {var_name}} is bad:"
)

Arguments

check

[TRUE | character(1) | list()]
Matches the return value of the check* functions from the {checkmate} package, i.e., either TRUE if the check was successful, or a character (the error message) else.

Can also be a list of multiple such values for alternative criteria, where at least one must be TRUE for a successful check.

var_name

[NULL | character(1)]
Optionally specifies the name of the input being checked. This name will be used for the default value of the prefix argument.

error

[logical(1)]
If check is not TRUE (or no element in check is TRUE, if check is a list), throw an error?

prefix

[character(1)]
A prefix for the thrown error message, only relevant if error is TRUE.

Value

TRUE if check is TRUE (or any element in check is TRUE, if check is a list) . Else, depending on error:

• If error is TRUE, throws an error.

• If error is FALSE, returns FALSE.

See also

Other package helpers: Dictionary, Storage, check_missing(), find_namespace_calls(), identical_structure(), match_arg(), package_logo(), print_data.frame(), print_matrix(), system_information(), unexpected_error(), user_confirm()

Examples

x <- "1"
y <- 1

### check is successful
input_check_response(
  check = checkmate::check_character(x),
  var_name = "x",
  error = TRUE
)
#> [1] TRUE

### alternative checks
input_check_response(
  check = list(
    checkmate::check_character(x),
    checkmate::check_character(y)
  ),
  var_name = "x",
  error = TRUE
)
#> [1] TRUE

### standardized check response
if (FALSE) { # \dontrun{
input_check_response(
  check = checkmate::check_character(y),
  var_name = "y",
  error = TRUE
)

input_check_response(
  check = list(
    checkmate::check_flag(x),
    checkmate::check_character(y)
  ),
  var_name = "y",
  error = TRUE
)
} # }