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Convert to length-1 duration

Source: R/to_dur.R
to_dur_scalar.Rd

Checks whether a vector can be converted to a length-1 lubridate::Period vector.

Usage

to_dur_scalar(
  x,
  ...,
  treat_number_as = c("seconds", "milliseconds", "days", "error"),
  allow_null = FALSE,
  allow_zero_length = FALSE,
  x_arg = caller_arg(x),
  to_arg = NULL,
  call = caller_env(),
  x_class = object_type(x)
)

Arguments

x

The object to stabilize.

...

Arguments passed to methods.

treat_number_as

(character(1)) How to interpret numeric input: "seconds" or "milliseconds" as a length of time, "days" as a number of days, or "error" to reject numbers. Ignored for non-numeric input.

allow_null

(logical(1)) Is NULL an acceptable value?

allow_zero_length

(logical(1)) Are zero-length vectors acceptable?

x_arg

(character(1)) The name of the object being stabilized to use in error messages. The automatic value will work in most cases, or pass it through from higher-level functions to make error messages clearer in unexported functions.

to_arg

(character(1) or NULL) The name of the object that x is being converted to match, for use in error messages. When NULL, error messages describe only x. When supplied, conversion failure messages name both x_arg and to_arg.

call

(environment) The execution environment to mention as the source of error messages.

x_class

(character(1)) The class name of the object being stabilized to use in error messages. Use this if you remove a special class from the object before checking its conversion, but want the error message to match the original class.

Value

The input as a length-1 lubridate::Period vector, or an error condition with classes <stbl-error>, <stbl-condition>, <rlang_error>, <error>, <condition>, and a specific class by failure mode:

  • <stbl-error-incompatible_values-duration> when some values cannot be safely converted to a duration.

  • <stbl-error-bad_null> for NULL values when allow_null = FALSE.

  • <stbl-error-bad_empty> for empty vectors when allow_zero_length = FALSE.

  • <stbl-error-non_scalar> for non-scalar vectors.

See also

Other duration functions: specify_dur(), stabilize_dur(), stabilize_dur_scalar(), to(), to_dur()

Other stabilization functions: assert_contains(), assert_not(), assert_present(), stabilize_all_of(), stabilize_any_of(), stabilize_arg(), stabilize_chr(), stabilize_chr_scalar(), stabilize_date(), stabilize_date_scalar(), stabilize_dbl(), stabilize_dbl_scalar(), stabilize_df(), stabilize_dttm(), stabilize_dttm_scalar(), stabilize_dur(), stabilize_dur_scalar(), stabilize_fct(), stabilize_fct_scalar(), stabilize_int(), stabilize_int_scalar(), stabilize_lgl(), stabilize_lgl_scalar(), stabilize_lst(), stabilize_one_of(), stabilize_time(), stabilize_time_scalar(), to_chr(), to_chr_scalar(), to_date(), to_date_scalar(), to_dbl(), to_dbl_scalar(), to_dttm(), to_dttm_scalar(), to_dur(), to_fct(), to_fct_scalar(), to_int(), to_int_scalar(), to_lgl(), to_lgl_scalar(), to_time(), to_time_scalar()

Examples

to_dur_scalar("P1D")
#> [1] "1d 0H 0M 0S"
try(to_dur_scalar(c("P1D", "P2D")))
#> Error in eval(expr, envir) : 
#>   `c("P1D", "P2D")` must be a single <Period>.
#> ✖ `c("P1D", "P2D")` has 2 values.