Coding on Jonas' Blog

(Ab)using rust macros to create parametrized modules

Tue, 14 May 2024 10:00:00 +0000

The (very niche) Problem

Some time ago I came across this blogpost which describes the agony the author went through to provide both a synchronous and an asynchronous version of their library.

What the author opted for in the end is a library that either generated async or normal code depending on the presence (or absence) of a feature flag. Importantly however, this would not work to enable both synchronous and asynchronous code generation at the same time (since synchronous code is emitted at the absence of the “asynchronous” flag).

a little ssh trick

Sun, 04 Jun 2023 10:00:00 +0000

I finally took time to set up my SSH properly. Due to the nature of my setup, I needed to use non-default ssh ports.

Kind of annoying, isn’t it? You have to specify the port ever time you connect, like so:

ssh user@host -p port

Worse even, if you have multiple ssh certificates, you need to specify that as well!

Luckily this problem has a very easy solution :)

SSH Configs

You can create a config file at ~/.ssh/config and save your frequent connected servers there.

My Favourite Programming Language

Thu, 18 May 2023 11:07:00 +0000

As hopefully many people are aware, C and C++ have a notion of “Undefined Behaviour”. Few people seem to realize what that means though, so I wanted to write a funny program to illustrate it.

Most people just seem to think that if Undefined Behaviour happens, then just some values might be random. However, I think it’s much worse than that.

At the moment I am using gcc version 13.1.1 20230429, so if you want to reproduce results I would recommend sticking to that (or very similar) compiler versions.

Self Hosting Gitea

Sun, 19 Mar 2023 22:13:00 +0000

Some time ago I decided I want to take matters into my own hands and host my own code. I was aware of a few git hosting services: GitHub, GitLab, BitBucket, and Gitea.

GitHub was no option, as you can’t self-host that.

I was not very familiar with GitLab, and it looked clunky, big, and slow to me.

BitBucket I was not a fan of due to it being product of an Australian company. See here why that might not be a good thing