callCC

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Call With Current Continuation

A downward-only version of Scheme's call with current continuation.

Keywords
programming
Usage
callCC(fun)
Arguments
fun
function of one argument, the exit procedure.
Details

callCC provides a non-local exit mechanism that can be useful for early termination of a computation. callCC calls fun with one argument, an exit function. The exit function takes a single argument, the intended return value. If the body of fun calls the exit function then the call to callCC immediately returns, with the value supplied to the exit function as the value returned by callCC.

Aliases
  • callCC
Examples
library(base) # The following all return the value 1 callCC(function(k) 1) callCC(function(k) k(1)) callCC(function(k) {k(1); 2}) callCC(function(k) repeat k(1))
Documentation reproduced from package base, version 3.3, License: Part of R @VERSION@

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