done: Box a final value for early termination

In hadley/rlang: Functions for Base Types and Core R and 'Tidyverse' Features

Box a final value for early termination

Description

A value boxed with done() signals to its caller that it should stop iterating. Use it to shortcircuit a loop.

Usage

done(x)

is_done_box(x, empty = NULL)

Arguments

x	For done(), a value to box. For is_done_box(), a value to test.
empty	Whether the box is empty. If NULL, is_done_box() returns TRUE for all done boxes. If TRUE, it returns TRUE only for empty boxes. Otherwise it returns TRUE only for non-empty boxes.

Value

A boxed value.

Examples

done(3)

x <- done(3)
is_done_box(x)

hadley/rlang documentation built on Dec. 17, 2024, 3:26 a.m.