Rex - Concatenative elixir macro language.

Rex is a concatenative language built with Elixir macros.

This means that rex has no parser as it just uses valid Elixir syntax.

Stack based

Rex is stack based, that is all rex functions take a list and return another list.

The topmost element in a stack is the one at index zero, for example, for [1, 2, 3] the top of the stack is 1. Most rex functions will operate on as much top-most elements as they needs and then push the result back on the top if needed.

For example, the following program will pipe an initial stack into a rex program:

iex> [4, 5] |> rex(3 ~> 2 ~> 1 ~> add ~> mul ~> swap)
[4, 9, 5] 

Pointless programming

With Rex you can write point-free functions.

drex sumr          List.foldr/3 <~ (&Kernel.+/2) <~ 0

assert [6] == [] |> rex([1, 2, 3] ~> sumr)

Installation

Available in Hex, the package can be installed as:

1. Add rex to your list of dependencies in mix.exs:

```elixir
def deps do
  [{:rex, "~> 0.1.0"}]
end
```