# crossbar
[](https://hex.pm/packages/crossbar)
[](https://hexdocs.pm/crossbar/)
## Usage
```gleam
import gleam/io
import crossbar.{int, max_value, min_value, required, to_float, validate}
pub fn main() {
  int("age", 16)
  |> to_float
  |> required
  |> min_value(18.0)
  |> max_value(21.0)
  |> validate
  |> io.debug
}
```
The snippet above will return the following error:
```gleam
Error([FailedRule("age", "min_value", "must be at least 18.0")])
```
## Installation
```sh
gleam add crossbar
```
Documentation can be found at <https://hexdocs.pm/crossbar>.