KC3 v0.1.14

KC3 is a programming language with meta-programmation and a graph database embedded into the language. It aims to be the language for semantic programming, and programming the semantic web.

This is a stable release, for the development branch see the KC3 git repository master branch.

KC3 is currently a programming language project, inspired by C, Elixir and Common Lisp. It could be described as C with Elixir modules, pattern matching, and a semantic object system. The idea is to plug modules, closures, pattern matching, a graph database and metaprogramming into C99 with an extremely small set of dependencies.

Components :

• The pure C11 libkc3 library is a full KC3 parser and interpreter.
• ikc3 is the interactive interpreter (verbose).
• kc3s is the script interpreter (same as ikc3 but terse).
• There are several C libraries which are installed in lib/kc3/0.1 using the make lib_links command.
• There is a web server in httpd : kc3_httpd.

All binaries can be compiled for four targets :

• main : speed optimizations from GCC/Clang -O2 and debug code like assert is disabled.
• debug : no optimization and debug code like assert is enabled
• cov : code coverage instrumentation (breaks dlsym and thus all Cfn at the moment)
• asan : memory safety instrumentation with ASAN, an absolutely awesome tool to detect all memory leaks, double free, segmentation faults, invalid read, invalid write, general memory corruption errors, etc., just run the asan target for a full report at process exit, the report being empty if all is ok.

Supported operating systems (additional dependencies) :

• BSD
• Linux (libbsd, libmd)
• MacOS X (libmd)
• Windows (MSys2) (no network)

Supported architectures :

• aarch64 (arm64, Apple M1, Apple M2)
• amd64
• i386
• sparc64

To install and test KC3 for yourself, you can follow the KC3 Installation Guide.

Users

There are now four full applications written in KC3 that we know of :

• The KC3 Cairo demo which you can run with make demo
• The KC3 SDL2 OpenGL demo which you can run with make demo_gl
• The KC3 website which you can launch locally with make test_httpd with all the KC3 releases and documentation.
• The www.kmx.io website which is closed source and is hosted on kmx.io servers in France using OpenBSD everywhere. We donate to OpenBSD every month because a healthy software ecosystem is a funded ecosystem.

New in this release

• pretty printer
  • auto indent KC3 code
• map
  • access
  • get (get key value)
  • put (return a new map)
• struct
  • access
  • get
  • put
• facts database (triple store) accessible from KC3
  • new database (Ptr)
  • add_tags
  • collect_with
  • collect_with_tags
  • remove_tags
  • with_tags
  • with
  • with_macro
• HTTPd v0.2.0
  • dynamic pages (MVC)
    • models are defined in ./app/models/
    • controllers are defined in ./app/controllers/
    • templates are defined in ./app/templates/
    • views are defined in ./app/views/
    • dynamic router is defined in ./config/router.kc3
      • For now we don’t match request method and just match the start of the URL with Str.starts_with?(url, route.path)
      • If there is no route or no controller or the controller does not return a HTTP response, a 404 error is returned. Other frameworks like Ruby on Rails or Phoenix do return a 500…
  • threads
    • env_fork_init
    • env_fork_clean
    • Thread.new(fn)
• fx v0.2.0
  • file explorer
  • preview files
    • text
    • image
    • video
    • audio
    • binary (hexdump -C)
  • properties
    • create
      • POST “/properties/*path”
    • delete
      • DELETE “/properties/*path

Discord invite

Join us on kmx.io Discord server !

Guides

Follow the KC3 guides to discover how to use KC3 for your own projects.

TODO

• fx
  • chaining of audio and video previews (folder as a playlist)
  • tags
    • create
      • POST “/tag/:tag/*path”
    • delete
      • DELETE “/tag/:tag/*path”
    • recursive
  • properties
    • recursive
• HTTPd
  • dynamic router
    • def_route(:get, “/user/:id/articles/*slug/edit”, UserArticlesController.edit)
• libkc3
  • operators dispatch
    • list of matching operators (facts_with)
  • base-specific big floats
  • macro cast : (Macro) fn (x) { x }
  • pretty printer
    • 80 columns (\n)
  • tags
    • generic walker
    • height function (TAG_VOID: 1, TAG_TUPLE: (1+ (max (height tuple->tags))))
    • has_ident
    • collect_idents
  • facts
    • negative facts : 4 + 2n = not 3 + 2n
    • with ignore variables
  • math
    • arbitrary precision floating point numbers (decimals)
  • enums
  • unions
  • errors (setjmp, longjmp)
    • stacktrace
      • ffi ?
        • libdwarf
  • control structures
    • when
    • unless
    • switch/case/cond
  • unwind protect
  • functions
    • return
  • livebook
    • gaussian
  • buf_sha256
  • buf_popen
  • tests