Test if object exists in namespace — exists_in

Determines whether or not an object exists in a specific namespace.

Usage

exists_in_namespace(x, ns, pos = -1L, envir = as.environment(pos))

Arguments

x: an object name (given as a character string).
ns: a namespace, or character string giving the namespace.
pos: where to look for the object: see get.
envir: an alternative way to specify an environment to look in.

Value

A logical scalar.

Details

This complements utils::getFromNamespace() and uses almost the same code internally.

Examples

if (pal::is_pkg_installed("pkgpurl")) {
  pal::exists_in_namespace("pkg_config", "pkgpurl")
}
#> [1] TRUE

pal::exists_in_namespace("pkg_config", "pal")
#> [1] FALSE