objectionary/eo

Health v2 · maintenance only

Adoption not part of the score

1415 stars · 243 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

EO (EOLANG) is an experimental pure object-oriented programming language based on 𝜑-calculus, implemented in Java. It deliberately rejects classes, inheritance, mutability, NULL, static methods, and other constructs it considers anti-patterns in mainstream OOP.

Use cases

• write programs in a purely object-oriented language
• experiment with phi-calculus based computation
• compile EO programs to JVM bytecode
• study elegant objects principles without classes or inheritance
• research immutability-first language design

When to choose

• you want to explore or research pure OO language design
• you're experimenting with formal calculus-based programming models
• you want a JVM language with no classes, mutability, or NULL

When to avoid

• you need a production-ready language with mature tooling
• you rely on classes, inheritance, or mutable state
• you need a large ecosystem and community libraries

Facets

cli-tool · maturity active

programming-language compiler interpreter programming-languages compilers developer-tools jvm cross-platform eolang phi-calculus object-oriented experimental-language elegant-objects immutable programming-language

Member repositories

For agents

markdown · JSON · MCP: product_card(name="objectionary/eo")