Crew assertion — crew_assert • crew

Assert that a condition is true.

Usage

crew_assert(value = NULL, ..., message = NULL, envir = parent.frame())

Arguments

value: An object or condition.
...: Conditions that use the "." symbol to refer to the object.
message: Optional message to print on error.
envir: Environment to evaluate the condition.

Value

NULL (invisibly). Throws an error if the condition is not true.

See also

Other utility: crew_clean(), crew_deprecate(), crew_eval(), crew_random_name(), crew_retry(), crew_terminate_process(), crew_terminate_signal(), crew_worker()

Examples

crew_assert(1 < 2)
crew_assert("object", !anyNA(.), nzchar(.))
tryCatch(
  crew_assert(2 < 1),
  crew_error = function(condition) message("false")
)
#> false