Hoeg

Hoeg is a concatenative style programming language implemented in Elixir.

What? and why?

Concatenative Programming is a style/paradigm that uses function composition instead of function application. "Why Concatenative Programming Matters" is a good article that explains the topic quite well. "The Joy of Concatenative Languages" blog post series is also nice.

For me Hoeg is more of a fun learning experience.

REPL

iex -S mix
Hoeg.REPL.start()

Stuff you can do

For bigger programs, check the examples dir.

IO

• print. Ex: "hello world" print

Math

+, -, *, /, %. Ex:

14 8 + 2 * 2 -

Boolean logic

• or. Ex: true false or
• and. Ex: true true and
• not. Ex: false not
• >, >=, <, <=, ==, !=

Definitions

Defines a new "function".

hoeg> foo: 1 2 +;
hoeg> foo
hoeg> 3

List operations

• cons. Ex: 1 0 [] cons cons will create a list [1 0] being left on the stack.

Ideas

Just putting down some things I'd like to explore.

• GenServers and Supervisors. How would this work? Maybe a good idea to first introduce something around Task.async.
• Nice enough error messages. Need line numbers (and position), and explanation.
• Pattern matching...?

Installation

If available in Hex, the package can be installed by adding hoeg to your list of dependencies in mix.exs:

def deps do
  [
    {:hoeg, "~> 0.2.0"}
  ]
end

Documentation can be generated with ExDoc and published on HexDocs. Once published, the docs can be found at https://hexdocs.pm/hoeg.