fluxen: a single-header key-value store for C++20

I built fluxen to solve a problem I kept running into in my side projects. I wanted persistent key-value storage without pulling in a full database or dealing with CMake/linking.

To use fluxen, you just drop the header into your project and you have a persistent key-value database that you can learn to use in an afternoon, with no CMake, no dependencies, and no linking.

#include "fluxen.hpp"

fluxen::DB db("myapp.db");
db.put("username", "jim");

if (auto name = db.get("username")) {
std::cout << *name << "\n"; // jim
}

It supports strings, numbers, and any trivially copyable type without the need for manual serialization. Transactions batch writes into a single syscall and guarantee durability via fsync.

GitHub: [https://github.com/dvuvud/fluxen](https://github.com/dvuvud/fluxen)

Docs: [https://dvuvud.github.io/fluxen](https://dvuvud.github.io/fluxen)

https://redd.it/1t928n5
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