chk

chk is an R package for developers to check user-supplied function arguments.

It is designed to be simple, customizable and fast.

Installation

To install the latest release from CRAN

install.packages("chk")

To install the latest development version from GitHub

# install.packages("remotes")
remotes::install_github("poissonconsulting/chk")

Demonstration

chk provides simple commonly used checks as (chk_ functions) which can be combined together for more complex checking.

library(chk)

y <- "a"

chk_string(y)
chk_flag(y)
#> Error: `y` must be a flag (TRUE or FALSE).

chkor(chk_flag(y), chk_number(y))
#> Error: At least one of the following conditions must be met:
#> * `y` must be a flag (TRUE or FALSE).
#> * `y` must be a number (non-missing numeric scalar).

data <- data.frame(x = 1:2)
chk_range(nrow(data), c(3, 8))
#> Error: `nrow(data)` must be between 3 and 8, not 2.

Error messages follow the tidyverse style guide while the errors themselves are rlang errors of subclass chk_error.

Information

For more information see the Get Started vignette.

Inspiration

• datacheckr
• checkr
• err
• testthat

Contribution

Please report any issues.

Pull requests are always welcome.

Code of Conduct

Please note that the chk project is released with a Contributor Code of Conduct. By contributing to this project, you agree to abide by its terms.