An advanced, statically typed, high performance scripting language with native C++ embedding.

This file:

// hello.flx
println$ "Hello World";

can be run directly:

flx hello.flx

It just works. No makefiles. No compiler switches. Automatic caching and dependency checking for Felix and C++. Uses a flx_pkgconfig database consisting of a directory of *.fpc files to specify and find libraries and header files based on in language abstract keys.

The aim is to run faster than C.

Underneath Felix generates highly optimised machine binaries which outperform most interpreters, bytecode compilers, virtual machines, and sometimes compiled languages including C and C++.

Felix is an aggressive inliner which performs whole program analysis and high level optimisations such as parallel assignment, self-tail call elimination.

Felix generates optimised C++ which is then compiled and optimised again by your system C++ compiler.

Felix is a C++ code generator specifically designed so that all your favourite C and C++ libraries can be embedded with little or no glue logic:

// required header 
header vector_h = '#include <vector>';

// C++11 for smart pointers
header memory_h = '#include <memory>' 
  requires package "cplusplus_11"
;
 
// types
type vector[T] = "::std::shared_ptr<::std::vector<?1>>" 
  requires vector_h, memory_h
;

type viterator[T] = "::std::vector<?1>::iterator"
  requires vector_h
;

// constructor
ctor[T] vector[T] : unit = "::std::make_shared<::std::vector<?1>>()";

// operations
proc push_back[T] : vector[T] * T =  "$1->push_back($2);";
proc push_back[T] (v: vector[T]) (elt:T) => push_back(v,elt);

fun stl_begin[T] : vector[T] -> viterator[T] = "$1->begin()";
fun deref[T] : viterator[T] -> T = "*$1";

// example use
var v = vector[int]();
v.push_back 42;
println$ *v.stl_begin;

• Python 3
• Ocaml 4.06.1 (only for source build)
• C++ compiler: g++, clang++, or msvc

• SDL2 for graphics
• GNU GMP, GNU GSL

git clone https://github.com/felix-lang/felix.git
cd felix
. buildscript/linuxsetup.sh
make  
sudo make install # optional!

git clone https://github.com/felix-lang/felix.git
cd felix
. buildscript/macosxsetup.sh
make  
sudo make install # optional!

On platforms supporting Nix, you can set up a build and runtime environment by running:

git clone https://github.com/felix-lang/felix.git
cd felix
nix-shell shell.nix
. buildscript/linuxsetup.sh
make  

This will do an in place "install" of the Felix binaries. Note that this should work on OS X with Nix, but needs to be tested.

Make sure git, Python3 and Ocaml are on your PATH. You can download a pre-built Ocaml 4.06.1 for Windows.

Open a cmd.exe console with Visual Studio 2015 or above environment established or run vcvarsall x86. See vcvarsall.

git clone https://github.com/felix-lang/felix.git
cd felix
. buildscript/winsetup.sh
nmake  
nmake install # optional!

http://github.com/felix-lang/felix/releases

Appveyor, Windows build: Travis, Linux build:

mailto:felix-lang@googlegroups.com

Felix is Free For Any Use (FFAU)/Public Domain.