Concatenative Programming

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Hello!

This space is for sharing news, experiences, announcements, questions, showcases, etc. regarding concatenative programming concepts and tools.

We'll also take any programming described as:

pipelined
stack-oriented
tacit
postfix / reverse Polish notation (RPN)

From Wikipedia:

A concatenative programming language is a point-free computer programming language in which all expressions denote functions, and the juxtaposition of expressions denotes function composition. Concatenative programming replaces function application, which is common in other programming styles, with function composition as the default way to build subroutines.

For example, a sequence of operations in an applicative language like the following:

y = foo(x)
z = bar(y)
w = baz(z)

...is written in a concatenative language as a sequence of functions:

x foo bar baz

Active Languages

Let me know if I've got any of these misplaced!

Primarily Concatenative

Concatenative-ish, Chain-y, Pipe-y, Uniform Function Call Syntax, etc.

Cheat Sheets & Tutorials

Discord

IRC

#concatenative on irc.libera.chat

Wikis

concatenative wiki

Wikipedia Topics

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planet-factor

Practice

Codewars (Forth, Factor, Nim)
Advent of Code
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Perl Weekly Challenge

founded 1 year ago

MODERATORS

Ategon

Andy

acook/blacklight: a stack-based concatenative virtual machine for implementing highly concurrent languages (github.com)

submitted 7 months ago by Andy to c/concatenative

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Copied from the project's readme:

blacklight is a programming language which is concurrent, stack-based, and concatenative (BLPL)
blacklight is a virtual machine for implementing highly concurrent languages (BLVM)
blacklight is a data interchange format for communicating between processes and across networks (BLBC)

Features

blacklight (BLVM) is awesome, here's a few reasons why:

easy to use builtin parallelism through native concurrency primatives
threadsafe communication between concurrency units
rich datatype primitives
an easy to use homoiconic Forth-like assembly language (BLPL)
runtime bytecode manipulation and generation
UTF-8 native datatypes
multi-architecture and cross-platform (currently: x86_64, ARM, macos, linux, windows)
(in progress) highly optimized vector operations on supported CPUs
(planned) security contexts and permissions

Documentation

The blacklight Wiki has documentation and links (work in progress).
The examples directory contains several demonstration scripts to get you started.

BLPOC

The current implementation of blacklight is a proof-of-concept. It's functional but intended primarily for proving out features, strategies, and specifications. Once The ABI is stable it will be reimplemented with optimization and compatibility in mind against a full test suite. As is, there is very little about blacklight that isn't subject to change to better reflect the results of research and experimentation.

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