Nothing
In rextendr: Build 'Rust' Powered 'R' Packages
library(rextendr)
```{extendrsrc engine.opts = list(use_dev_extendr=TRUE)}
[extendr]
fn check_default(#[extendr(default = "NULL")] x: Robj) -> bool {
x.is_null()
}
```r
testthat::expect_true(check_default())
Try the rextendr package in your browser
Any scripts or data that you put into this service are public.
rextendr documentation built on April 18, 2026, 5:07 p.m.
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
library(rextendr)
```{extendrsrc engine.opts = list(use_dev_extendr=TRUE)}
[extendr]
fn check_default(#[extendr(default = "NULL")] x: Robj) -> bool { x.is_null() }
```r testthat::expect_true(check_default())
Try the rextendr package in your browser
Any scripts or data that you put into this service are public.
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
Embedding an R snippet on your website
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.