--- title: Copper – A minimal low-level programming language with... description: Copper is a programming language built as a replacement for C. It adds type inheritance for any type, genericity, multiple return values, out-of-order... canonical: https://daily.dev/posts/copper-a-minimal-low-level-programming-language-with-oop-and-generics-5o9p2hwoe twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Copper – A minimal low-level programming language with OOP and generics | daily.dev og:description: Copper is a programming language built as a replacement for C. It adds type inheritance for any type, genericity, multiple return values, out-of-order... og:url: https://daily.dev/posts/copper-a-minimal-low-level-programming-language-with-oop-and-generics-5o9p2hwoe og:image: https://api.daily.dev/og/posts/5o9p2HWOe.png og:image:alt: Copper – A minimal low-level programming language with OOP and generics og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Copper – A minimal low-level programming language with OOP and generics **[Hacker News](https://daily.dev/sources/hn)** · 1 min read · 0 upvotes · 0 comments ## Summary Copper is a programming language built as a replacement for C. It adds type inheritance for any type, genericity, multiple return values, out-of-order definitions, a simple import system without headers, deferred statements, simple iterators, Ruby-style syntax, and option types. The author calls minimalism the most important feature, aiming for a language simple enough to fully understand. It also emphasizes fast compilation and keeping things out of the global namespace. Copper is released under the BSD license. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What is the Copper programming language and how does it differ from C? Copper is a programming language designed as a replacement for C, adding features C lacks such as type inheritance for any type, genericity, multiple return values, out-of-order definitions, a simple import system without headers, deferred statements, simple iterators, Ruby-style syntax, and option types. Its creator emphasizes minimalism and fast compilation as core design goals, aiming for a language simple enough to be fully understood. _Developers weighing alternative systems languages against C can track projects like this on daily.dev._ ## Community take How the wider developer community reacted, aggregated from 1 discussion and 74 comments across hackernews (as of 2026-11-02). **TL;DR:** The discussion is largely a close syntax and design critique of Copper, with appreciation for its minimalism and Ruby/Crystal-like syntax, alongside persistent questions about memory management, C interop, and a long grammar/self-hosting tangent. **Sentiment:** 25% positive · 45% mixed · 30% skeptical **The case for** - Several found the syntax clean, minimal, and 'deeply sane.' - The worked example on the site was praised as unusually effective at conveying the feel of the language. - Compared favorably in syntax terms to Crystal, with some liking its more explicit/stronger typing by default. **The pushback** - Multiple people couldn't find documentation on memory management, deallocation, or whether there's a GC. - Several questioned what Copper compiles to, its memory model, and whether it has C ABI/FFI compatibility. - One developer pointed out inconsistent syntax choices (type annotation order, return type syntax, multi-variable declarations) that felt alien. - Someone reported it doesn't actually build on Linux and lacks string interpolation or kebab-case. - Passing arguments by reference by default was flagged as a potential recursion/footgun concern. - A tangent argued self-hosting a compiler is a risky distraction from focusing on language features unrelated to compiler-writing. **By community** - hackernews (mixed): Praise for the minimalist Ruby/Crystal-like syntax is mixed with substantial unanswered questions about memory management, compilation target, and C interop, plus long tangents on grammar nitpicking and self-hosting. **Hottest debate:** Whether self-hosting a new language's compiler is a worthwhile milestone or a harmful distraction from language design. **Open questions** - Is Copper garbage collected, and if not, how is memory freed given alloc exists but no clear free pattern? - What does Copper compile to, and what is its memory model? - Does it have C ABI compatibility or an FFI for binding to existing libraries? - Why is memory passed by reference by default, and how does that interact with recursion? **Highlights** > How does it free memory? I don't get it. I browsed the docs a bit but didn't find a single reference to deallocation. There's alloc for heap allocation but no free? > — [nirei on hackernews · 1 comments](https://news.ycombinator.com/item?id=50328481) > As a Crystal fan, really nice syntax. The documentation leaves open several questions: What is the memory model here? What does it compile to? What makes it 'low level'? Is there a GC? Does it have ABI compatibility with C or a FFI? > — [ricardobeat on hackernews](https://news.ycombinator.com/item?id=50328237) > I'd like to come up with some constructive comments, but I find everything so inconsistent and alien to me... For example, variable declarations use the pattern , as in var a: Int32 But literals follow the opposite syntax, as in a = Int32: 42 The return type of a function is introduced by : in func definitions, but by -> in imported func declarations: func foo(a:Int):Int import func bar(a:Int) -> (Int) Other construct that I find far from my habits: var w, h, d = 640, 480, 2 instead of the more obvious (for me): var w=640, h=480, d=2 Arguments are passed by ref, not by val. Good luck with recursion! > — [teo\_zero on hackernews](https://news.ycombinator.com/item?id=50331231) > Looks nice and small. Too bad it doesn't quite actually build (on Linux). Also, no string interpolation (AFAIC) and no kebab-case. Here's my current stab at a small compiled language: . > — [stevefolta on hackernews](https://news.ycombinator.com/item?id=50328162) > The usual argument is that it is a distraction when you’re designing a language, and it leads to programming languages that are all excellent for writing compilers and parsers, but not particularly good for other things. Since the majority of programs are not compilers, it might make more sense to focus on interesting things that aren’t relevant to compilers. Some ideas from the top of my head: async I/O, a great SIMD story, effect systems, robustness systems for long-running processes (I’m only aware of Erlang/Elixir), and many others. Compilers do exercise some things, like error handling and memory management, but they’re not particularly difficult or interesting in general. > — [simonask on hackernews](https://news.ycombinator.com/item?id=50331698) **Source threads** - [hackernews](https://news.ycombinator.com/item?id=50308754) · 120 points · 74 comments ## Similar posts on daily.dev - [C3](https://daily.dev/posts/c3-5w6a8vyad) · Hacker News · 0 upvotes · 0 comments - [Ruby Programming Language](https://daily.dev/posts/ruby-programming-language-xlmujxgbj) · Lobsters · 3 upvotes · 0 comments --- Tags: [#c](https://daily.dev/tags/c) [View this post on daily.dev](https://daily.dev/posts/copper-a-minimal-low-level-programming-language-with-oop-and-generics-5o9p2hwoe) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Copper – A minimal low-level programming language with OOP and generics","url":"https://daily.dev/posts/copper-a-minimal-low-level-programming-language-with-oop-and-generics-5o9p2hwoe","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/copper-a-minimal-low-level-programming-language-with-oop-and-generics-5o9p2hwoe"},"datePublished":"2026-11-01T21:32:08.253Z","dateModified":"2026-11-02T01:02:50.779Z","description":"Copper is a programming language built as a replacement for C. 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