stabilize_lgl {stbl}

Ensure a logical argument meets expectations

Description

to_lgl() checks whether an argument can be coerced to logical without losing information, returning it silently if so. Otherwise an informative error message is signaled.

stabilize_lgl() can check more details about the argument, but is slower than to_lgl().

stabilize_lgl_scalar() and to_lgl_scalar() are optimized to check for length-1 logical vectors.

Usage

stabilize_lgl(
  x,
  ...,
  allow_null = TRUE,
  allow_na = TRUE,
  min_size = NULL,
  max_size = NULL,
  x_arg = caller_arg(x),
  call = caller_env(),
  x_class = object_type(x)
)

stabilize_lgl_scalar(
  x,
  ...,
  allow_null = TRUE,
  allow_zero_length = TRUE,
  allow_na = TRUE,
  x_arg = caller_arg(x),
  call = caller_env(),
  x_class = object_type(x)
)

to_lgl(
  x,
  allow_null = TRUE,
  x_arg = caller_arg(x),
  call = caller_env(),
  x_class = object_type(x)
)

to_lgl_scalar(
  x,
  allow_null = TRUE,
  allow_zero_length = TRUE,
  x_arg = caller_arg(x),
  call = caller_env(),
  x_class = object_type(x)
)

Arguments

x

The argument to stabilize.

...

These dots are for future extensions and should be empty.

allow_null

Logical. Is NULL an acceptable value?

allow_na

Logical. Are NA values ok?

min_size

Integer. The minimum size of the object. Object size will be tested using vctrs::vec_size().

max_size

Integer. The maximum size of the object. Object size will be tested using vctrs::vec_size().

x_arg

Character. An argument name for x. The automatic value will work in most cases, or pass it through from higher-level functions to make error messages clearer in unexported functions.

call

The execution environment of the call. See the call argument of rlang::abort() for more information.

x_class

Character. The class name of x to use in error messages. Use this if you remove a special class from x before checking its coercion, but want the error message to match the original class.

allow_zero_length

Logical. Are zero-length vectors acceptable?

Value

The argument as a logical vector.

Examples

to_lgl(TRUE)
to_lgl("TRUE")
to_lgl(1:10)
to_lgl(NULL)
try(to_lgl(NULL, allow_null = FALSE))
try(to_lgl(letters))
try(to_lgl(list(TRUE)))

to_lgl_scalar("TRUE")
try(to_lgl_scalar(c(TRUE, FALSE)))

stabilize_lgl(c(TRUE, FALSE, TRUE))
stabilize_lgl("true")
stabilize_lgl(NULL)
try(stabilize_lgl(NULL, allow_null = FALSE))
try(stabilize_lgl(c(TRUE, NA), allow_na = FALSE))
try(stabilize_lgl(letters))
try(stabilize_lgl(c(TRUE, FALSE, TRUE), min_size = 5))
try(stabilize_lgl(c(TRUE, FALSE, TRUE), max_size = 2))

stabilize_lgl_scalar(TRUE)
stabilize_lgl_scalar("TRUE")
try(stabilize_lgl_scalar(c(TRUE, FALSE, TRUE)))
stabilize_lgl_scalar(NULL)
try(stabilize_lgl_scalar(NULL, allow_null = FALSE))