assert_all_are_existing

From assertive.code v0.0-3 by Richard Cotton

Does the variable exist?

Checks to see if the input variables exist.

Usage

assert_all_are_existing(x, envir = parent.frame(), inherits = TRUE,
  severity = getOption("assertive.severity", "stop"))
assert_any_are_existing(x, envir = parent.frame(), inherits = TRUE,
  severity = getOption("assertive.severity", "stop"))
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.
severity: How severe should the consequences of the assertion be? Either "stop", "warning", "message", or "none".
.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.

Examples

# NOT RUN {
e <- new.env()
e$x <- 1
e$y <- 2
assert_all_are_existing(c("x", "y"), envir = e)
#These examples should fail.
assertive.base::dont_stop(assert_all_are_existing(c("x", "z"), envir = e))
# }

Documentation reproduced from package assertive.code, version 0.0-3, License: GPL (>= 3)

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