README.Rmd

---
output: github_document
---

<!-- README.md is generated from README.Rmd. Please edit that file -->

```{r, include = FALSE}
knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>",
  fig.path = "man/figures/README-",
  out.width = "100%"
)
```

# chk <img src="man/figures/logo.png" align="right" />

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`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](https://cran.r-project.org)
```r
install.packages("chk")
```

To install the latest development version from [GitHub](https://github.com/poissonconsulting/chk)
```r
# 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.

```{r, error = TRUE}
library(chk)

y <- "a"

chk_string(y)
chk_flag(y)

chkor(chk_flag(y), chk_number(y))

data <- data.frame(x = 1:2)
chk_range(nrow(data), c(3, 8))
```

Error messages follow the [tidyverse style guide](https://style.tidyverse.org/error-messages.html) while the errors themselves are [rlang errors](https://rlang.r-lib.org/reference/abort.html) of subclass `chk_error`.

## Information

For more information see the [Get Started](https://poissonconsulting.github.io/chk/articles/chk.html) vignette.

## Inspiration

- [datacheckr](https://github.com/poissonconsulting/datacheckr/)
- [checkr](https://github.com/poissonconsulting/checkr/)
- [err](https://github.com/poissonconsulting/err/)
- [testthat](https://github.com/r-lib/testthat/)

## Contribution

Please report any [issues](https://github.com/poissonconsulting/chk/issues).

[Pull requests](https://github.com/poissonconsulting/chk/pulls) are always welcome.

## Code of Conduct

Please note that the chk project is released with a [Contributor Code of Conduct](https://contributor-covenant.org/version/2/0/CODE_OF_CONDUCT.html). By contributing to this project, you agree to abide by its terms