Similar projects and alternatives to eo based on common topics and language
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eo reviews and mentions
Eolang, an Experimental Object-Oriented Programming Language Based on 𝜑-Calculus
2 projects | news.ycombinator.com | 5 Sep 2021
They do have a paper in the repo: https://github.com/cqfn/eo/tree/master/paper
According to it, "𝜑-calculus" is something they made up for the eolang and not a standard term.
Here is my take on that calculus based on reading through section 3 in the paper. Note the paper is pretty weird and likes to make its own notation, so it is possible I got some things wrong:
It is starts with a pretty standard immutable language: "object" is a set of (name, value) pairs; "value" is either object or "data" (like a string, bool etc...); everything is immutable but you can make a copy an object with some attributes changed. There are no concept of "types" -- instead, you define objects with some fields set to NULL (spelled ∅ in the paper). There are also a bunch of term defined, like "abstraction", "application", etc.. -- but they all mean "make a copy of an object with some fields changed".
The "twist" is that the language has no functions per se, instead it defines AST-like structure: there is a syntactic sugar that handles things that look like function applications. So when you see:
stdout "Hello world"2 projects | news.ycombinator.com | 5 Sep 2021
objectionary/eo is an open source project licensed under MIT License which is an OSI approved license.
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