Carp

WARNING! This is a research project and a lot of information here might become outdated and misleading without any explanation. Don't use it for anything important just yet!

Carp is a small programming language designed to work well for interactive and performance sensitive use cases like games, sound synthesis and visualizations.

The key features of Carp are the following:

Automatic and deterministic memory management (no garbage collector or VM)
Inferred static types for great speed and reliability
Live reloading of code, REPL-driven development, a fun and helpful workflow
Ownership tracking enables a functional programming style while still using mutation of cache friendly data structures under the hood
No hidden performance penalties – allocation and copying is explicit
Very good integration with existing C code

Learn more

Installation - how to build the Carp compiler
The Compiler Manual - how to compile code and configure your projects
Carp Language Guide - syntax and semantics of the language
Libraries - the various libraries that come built-in to Carp
typograf.carp - a more complex example

A Small OpenGL/GLFW Example

(import gl)

(defn init []
  0f)

(defn tick [state]
  (+ state 0.15f))

(defn draw [state]
  (let [t @state
        steps 100
        step (/ 1f (itof steps))]
    (for (i 0 steps)
      (let [r (* step (itof i))
            r2 (+ r step)]
        (draw-line (* r (cosf (* t r)))
                   (* r (sinf (* t r)))
                   (* r2 (cosf (* t r2)))
                   (* r2 (sinf (* t r2))))))))

(defn spin []
  (glfw-app "Spin" init tick draw default-on-keys))

To build this example, save it to a file called 'example.carp' and load it with (load-lisp "example.carp"), then execute (bake-exe spin) to build an executable, or (spin) to run the program directly from the REPL.

Contributors

Erik Svedäng @e_svedang
Markus Gustavsson
Fyodor Shchukin
Anes Lihovac
Chris Hall

License

This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.