immer – a library of persistent and immutable data structures written in C++

The C++ world just got a “don’t touch that!” button. immer is a library that keeps your data frozen in place—no surprise edits, no midnight bugs—aimed at making interactive and concurrent (lots happening at once) programs easier. With a talk, a paper, and code to boot, the project flexes serious research. But the real show? The comments. One camp is full-on hype—“Very good stuff”—like it’s a power-up for C++. Another camp squints at the branding: “Is this related to the JS library called Immer… and why don’t they acknowledge each other?” Cue the identity crisis memes. Then there’s the spicy subplot: garbage collection in C++ (a system that automatically cleans up memory). A commenter points out immer offers both garbage-collected heaps and old-school reference counting. That sparked the classic culture clash: performance purists vs “please, fewer memory nightmares.” Fans dredged up past fame too, linking to big 2016 and 2019 threads—this isn’t its first rodeo. The funniest bit? One user bragged they “religiously” scrolled 490 packages to make sure they weren’t missing a gem. Between sponsorship pitches and Redux-for-C++ vibes, the mood is: freeze your data, unfreeze the drama.