tests/testthat/_snaps/getopt.md

In optparse: Command Line Option Parser

negative-number-looking bundle is passed as argument or expanded to short flags

Code
  parse_args(parser, c("--mean=5", "-3.14"))
Condition
  Error:
  ! short flag "3" is invalid

Code
  parse_args(parser, c("-12"))
Condition
  Error:
  ! short flag "1" is invalid

type coercion warns when value cannot be converted to expected type

Code
  parse_args(parser, c("--count", "foo"))
Condition
  Warning in `value[[3L]]()`:
  integer expected, got "foo"
Output
  $help
  [1] FALSE

  $count
  [1] "foo"

Code
  parse_args(parser, c("--mean", ""))
Condition
  Warning in `getopt()`:
  double expected, got ""
Output
  $help
  [1] FALSE

  $mean
  [1] NA

abbreviated long flag matching two options raises ambiguous error

Code
  parse_args(parser, c("--verb"))
Condition
  Error:
  ! long flag "verb" is ambiguous

optparse documentation built on April 17, 2026, 9:06 a.m.