FLUX - Programming language

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FLUX is an open source programming language created in 2014 by Paul O’Shannessy.

#150on PLDB

10Years Old

187Repos

Download source code:

git clone https://github.com/facebook/flux

Homepage · Source Code · Docs

Application Architecture for Building User Interfaces

Tags: programming language
FLUX is developed on GitHub and has 17,382 stars
There are at least 187 FLUX repos on GitHub
Early development of FLUX happened in https://github.com/fluxcd
FLUX is written in JavaScript, Markdown, JSON, SVG, CSS, HTML, YAML
The Google BigQuery Public Dataset GitHub snapshot shows 792 users using FLUX in 853 repos on GitHub

Example from the web:

// concrete node signatures
Listen ()
  => (int socket);

ReadRequest (int socket)
  => (int socket, bool close, image_tag *request);

CheckCache (int socket, bool close, image_tag *request)
  => (int socket, bool close, image_tag *request);

// omitted for space:
// ReadInFromDisk, StoreInCache
Compress (int socket, bool close, image_tag *request, __u8 *rgb_data)
  => (int socket, bool close, image_tag *request);
Write (int socket, bool close, image_tag *request)
  => (int socket, bool close, image_tag *request);
Complete (int socket, bool close, image_tag *request) => ();

// source node
source Listen => Image;

// abstract node
Image = ReadRequest -> CheckCache -> Handler -> Write -> Complete;

// predicate type & dispatch
typedef hit TestInCache;
Handler:[_, _, hit] = ;
Handler:[_, _, _] =
ReadInFromDisk -> Compress -> StoreInCache;

// error handler
handle error ReadInFromDisk => FourOhFor;

// atomicity constraints
atomic CheckCache:{cache};
atomic StoreInCache:{cache};
atomic Complete:{cache};

Language features

Feature	Supported	Example	Token
Comments	✓	// A comment
Line Comments	✓	// A comment	//
Semantic Indentation	X