flow9: A C repository from Rishat7c

flow

flow is a platform for safe, easy and productive programming of complex, multi-platform apps with a modern user interface.

The flow platform includes

The flow programming language, a safe, functional strongly-typed programming language
The flowc compiler, an incremental compiler for multiple targets
The flow runtime & standard library, which provides a complete cross-platform library including mature UI components

flow has production quality targets for:

HTML through JS
iOS
Android
Windows, Mac, Linux

Hello world

import runtime;

main() {
	println("Hello world");
}

Meet flow

flow is a simple, functional language in the ML family
C-family syntax
Strongly typed, polymorphism, subtypes
Designed to look like other languages and be easy to learn
Minimalistic to reduce complexity and ease porting to new platforms
Same code compiles and runs on HTML5, iOS, Android, Windows, macOS, Linux
Production quality. Software used by millions of users
Pixel precision—high-design, responsive UI on all platforms with identical code
Complete standard library written in flow itself, with natives for each backend
Extensive UI toolkit based on Google Material Design guidelines
UI toolkit based on Functional Reactive Programming

Installation

Make sure you have Git LFS installed.
Check out this repository with something like

git clone https://github.com/area9innovation/flow9
Add flow9\bin to your path. We also require 64-bit Java Runtime and Python in your path.
Cd into the flow9 directory and compile and run the first program:

c:/flow9> flowcpp demos/demos.flow

If this does not work, make sure you have Git LFS installed. You have to reclone the flow9 repository after installing Git LFS, or use git lfs pull.

See demos/demos.flow to read the code for this example.

Documentation

See doc/readme.markdown for further documentation about the language and platform, including more details on how to get started.

Community

There is a blog about flow here:

https://flow9.org/

There is a chat in Telegram for discussions about flow:

https://t.me/joinchat/LhUedxYVLN25Eu9XNo93yQ

There is a mailing list group in groups.io about flow as well:

https://groups.io/g/flow

Your first message requires moderation approval to avoid spam.

Tooling

flowc is the current compiler, written in flow itself. See tools/flowc. Can work as a compile server.
flow is the original compiler, written in haxe. See tools/flow
Single-step debugger using gdb protocol (see platforms/qt)
Profiler for time, instructions, memory, garbage collection
JIT (just-in-time) compiler for x64, interpreter for ARM and others
Compiles to C++ and Java for performance-critical code, typically server side
IDE/Code editor support for VSCode, Sublime Text, Kate & others
Mature PEG parser generator. See doc/lingo.markdown

Folders

bin - binaries for the compiler and related tools
debug - code for the debugger and profiler
demos - a demo program showing how the UI library can be used
doc - documentation of the language and libraries
lib - the flow standard library
platforms - the flow runtime platforms source code
resources - integrations with VS code (recommended), Sublimetext and more
sandbox - contains hello world
tools - the compiler and processor for rendering fonts
www - required files to be exposed by the web-server for running flow programs online
www_source - the source files of some of the files in the www folder

License

The flow compiler is licensed under GNU General Public License version 2 or any later version. The flow standard library is released under the MIT license. For the license of other components, see LICENSE.txt.

Name

flow was started in 2010. This predates the 'flow' typechecker from Facebook. Thus, we elect to keep the name, since it came first, is a full platform and the risk of confusion seems small. However, should the need arise, then flow9 can also be used to refer to this language.

History

August 2010: The very first program ran on Flash & HTML5
November 2013: First app approved in iOS store
April 2014: First app approved in Android PlayStore
November 2015: Flash was retired, completely migrated to HTML5
January 2016: Material guidelines implemented
November 2016: JIT for x64 was added
May 2018: Self-hosted compiler written in flow itself
April 2019: Initial open source release

Rishat7c/flow9