Backport of get0 for R < 3.2.0

See the original description in base::get0.

get0(
  x,
  envir = pos.to.env(-1L),
  mode = "any",
  inherits = TRUE,
  ifnotfound = NULL
)

Examples

# get function from namespace instead of possibly getting
# implementation shipped with recent R versions:
bp_get0 = getFromNamespace("get0", "backports")

bp_get0("a")
#> NULL
bp_get0("a", ifnotfound = 0)
#> [1] 0

foo = 12
bp_get0("foo")
#> NULL