Writing your own C++ standard library from scratch

BonusPlay · 2025-03-25T08:58:05 1742893085

A problem I encountered while writing custom stdlib, is that certain language features expect stdlib to be there.

For example, <=> operator assumes, that std::partial_ordering exists. Kinda lame. In the newer C++ standards, more and more features are unusable without stdlib (or at least std namespace).

unwind · 2025-03-25T08:40:37 1742892037

Very nice! I like the tone and flippant energy of the post, of course, and also the way to get a nice scope by having a concrete case of a program to implement.

I also appreciated the comparisons against STL, very informative. It's ... interesting that if including `vector` in STL brings in 27,000 lines, and the author's implementation of the functionality for the example program was only 1,000 lines, that the compilation time difference is only 4X. Not sure I understand that, really. But benchmarking is hard, of course.

If I could come with a single suggestion it would be to include the sample program's source as text, not as a picture of text. If that means losing the pretty syntax highlighting, that's fine (by me). :)

fefe23 · 2025-03-25T08:42:47 1742892167

The title is confusing. He is not reimplementing the STL. He is writing some C++ classes providing functionality that is also already implemented in STL.

damnitbuilds · 2025-03-25T08:46:12 1742892372

Yes, and he has so far reimplemented only a tiny fraction of that STL functionality.

Still interesting, despite the misleading title.

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