# Extensibility in Programming Languages: An overview

arXiv: https://arxiv.org/abs/2510.13236 · HTML: https://mlsanity.com/paper/2510.13236/

## Key facts

- Cited by 1 papers in the map (data through 14 Oct 2026).
- First posted on arXiv 15 Oct 2025.

## Built on by (most cited first, 1 of 1)

- [OntoLearner: A Modular Python Library for Ontology Learning with Large Language Models](https://mlsanity.com/paper/2607.01977/) (2026)

## Abstract (arXiv)

I here conduct an exploration of programming language extensibility, making an argument for an often overlooked component of conventional language design. Now, this is not a technical detailing of these components, rather, I attempt to provide an overview as I myself have lacked during my time investigating programming languages. Thus, read this as an introduction to the magical world of extensibility. Through a literature review, I identify key extensibility themes - Macros, Modules, Types, and Reflection - highlighting diverse strategies for fostering extensibility. The analysis extends to cross-theme properties such as Parametricism and First-class citizen behaviour, introducing layers of complexity by highlighting the importance of customizability and flexibility in programming language constructs. By outlining these facets of existing programming languages and research, I aim to inspire future language designers to assess and consider the extensibility of their creations critically.