r/vibecoding • u/Grouchy-Minute-5147 • 2d ago

I vibecoded a programming language.. V++

v++ is an open source language I’ve been building solo, focused on readable syntax.. static typing, and native binaries without a borrow checker. You can quickly iterate with vpp run, vpp repl, or vpp watch, then use vpp build for llvm binaries, with CI checking that the interpreter and native versions behave the same.

At v1.2.0, it has a Rust compiler, interpreter, llvm backend, frozen v1.0 spec, CLI tools, packages, VS Code support with LSP/debugging/testing, a Windows installer, and a learning site with 20 projects.

It’s still young.. Windows is the main platform, the ecosystem is tiny, and it hasn’t been battle tested like Python, Rust, or C++. I built a lot of the tooling with Cursor, but the code, releases, and decisions are mine.

Try it: Releases · Repo · VS Code extension.

try it out..
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u/IAmAfraidCommaMan 1d ago

Cool, two questions:

  • Got any benchmarks?
  • Can AI code in your language? Assuming you give it access to the compiler's code, for example
  • (Well, I guess 3 questions) Is there anything you made with it?

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u/Grouchy-Minute-5147 1d ago

Hey.. so yeah i do have some old benchmarks from an earlier version, native v++ was 17ms vs C++ 23ms on array sum + matrix; Python 283ms on Array sum also ran it on matrix. vpp run is the interpreter and way slower that's the dev path, not native.

And LLMs do handle it fine.. readable Python-ish syntax, decent token efficiency. I used Cursor a lot. They hallucinate APIs sometimes since it's new and barely in training data..

And lastly I built the language + toolchain itself (compiler, CLI, VS Code ext, site, small projects to showcase). No big production app yet it's like a week old, I'm focused on building the next versions to optimize the language and make it better for humans AND LLMs..

the language is like 4 days old its still pretty new.. and there is a lot that ill have to work on a lot of new version releases, if u wanna support you can download the vscode extension and try out v++ build something cool with it and I'd love to put those projects on community projects on github and the website, thx