latch: Latch an Error or a Warning

In erratum: Handle Error and Warning Messages

Description

Latch an error or a warning to an object to indicate an issue associated with it. These can later be checked with is.e() and is.w(), and can also be resolve().

Usage

latch.e(obj, error)

latch.w(obj, warning)

unlatch(obj)

Arguments

obj	Object to latch the error or warning onto.
error, warning	Error or warning, the output of e() or w().

Functions

• latche and latchw: latch an error or a warning.

• unlatch: unlatch any error or warning.

Examples

x <- 1
problematic <- latch.e(x, e("Not right"))

is.e(problematic)

do_sth_with_x <- function(x){
 resolve(x)
 x + 1
}

if(interactive()){
 do_sth_with_x(x)
 do_sth_with_x(problematic)
}

unlatch(problematic)

erratum documentation built on Jan. 4, 2022, 1:08 a.m.