assertive (version 0.3-0)

assert_all_are_existing: Does the variable exist?

Description

Checks to see if the input variables exist.

Usage

assert_all_are_existing(x, envir = parent.frame(), inherits = TRUE)

assert_any_are_existing(x, envir = parent.frame(), inherits = TRUE)

is_existing(x, envir = parent.frame(), inherits = TRUE,
  .xname = get_name_in_parent(x))

Arguments

x

Input to check.

envir

Passed to exists.

inherits

Passed to exists.

.xname

Not intended to be used directly.

Value

• is_existing is a vectorized wrapper to exists, providing more information on failure (and with a simplified interface). The assert_* functions return nothing but throw an error if is_existing returns FALSE.

See Also

exists.

Examples

e <- new.env()
e$x <- 1
e$y <- 2
assert_all_are_existing(c("x", "y"), envir = e)
#These examples should fail.
dont_stop(assert_all_are_existing(c("x", "z"), envir = e))