backports (version 1.5.0)

stopifnot: Backport of stopifnot for R versions < 4.0.0.

Description

See the original description in base::stopifnot.

Usage

stopifnot(..., exprs, exprObject, local = TRUE)

Examples

# get function from namespace instead of possibly getting
# implementation shipped with recent R versions:
bp_stopifnot = getFromNamespace("stopifnot", "backports")

m <- matrix(c(1, 3, 12, 1), 2, 2)
if (FALSE) bp_stopifnot("m must be symmetric" = m == t(m))