# Belp
[](https://travis-ci.org/tlux/belp)
[](https://coveralls.io/github/tlux/belp?branch=master)
[](https://hex.pm/packages/belp)
A simple *B*oolean *E*xpression *L*exer and *P*arser written in Elixir.
## Installation
The package can be installed by adding `belp` to your list of dependencies in
`mix.exs`:
```elixir
def deps do
[
{:belp, "~> 0.1"}
]
end
```
## Usage
```elixir
iex> Belp.eval("foo and bar", foo: true, bar: false)
{:ok, true}
iex> Belp.eval!(
...> "(foo or bar) and not baz",
...> %{"foo" => false, "bar" => true, "baz" => true}
...> )
false
iex> Belp.variables("foo or bar")
{:ok, ["foo", "bar"]}
iex> Belp.variables!("foo or bar")
["foo", "bar"]
```
See [HexDocs](https://hexdocs.pm/belp) for the full API.