Add An on.exit() Call to A Parent Function | /en/2017/12/on-exit-parent/

访客 *Shrek, Tan* @ 2018-01-07 22:13:14 写道：

前两周鼓捣了两个小时最后放弃的问题，居然不小心在这看到了答案。真是踏破铁鞋无觅处，得来全不费功夫。

@shrektan

Guest *Michael Chirico* @ 2018-02-20 16:34:41 originally posted:

awesome, genius use of do.call. shame on.exit doesn't have an envir argument itself. this is quite useful for tidyverse where everything is buried 6 layers deep of functions and i want to on.exit the main function :)

I'm a bit confused how when f on.exits, it knows what x is though...

Guest *elr* @ 2019-09-15 18:44:16 originally posted:

Thanks for this very useful post!
Any thoughts on making above script also work in a Markdown R chunk? Looks like knitr causes on.exit to run immediately :

• running g() in an R script :

[1] "exiting g()"

• running g() in a Markdown R chunk with knitr :
  g()

[1] "exiting g()"

[1] "an exit call added to f() by g()"