If we would like to derive a custom array type, in Common Lisp, we can not inherit from some of the built-in classes. The standard forbids it : 'Attempting to use defclass to define subclasses of a built-in-class signals an error. Calling slot-value on a generalized instance of a built-in class signals an error. Redefining a built-in class or using change-class to change the class of an object to…
About I am learning Common Lisp, so I am experimenting and playing around with things. It started with writing a small command-line parsing library, and ended with a trip into a rabbit hole of an experiment. I do not know if someone will find it useful, perhaps not, but it is nice to write things down, it sorts of clean thoughts, at least for me. Command line parsing in C Typically, for parsing…
For the needs of a project, I wrote a little template library some time ago. However, I never really liked it and didn't really finish it. On the good side, I made it flexible with customizable markers, so I was able to use {{ }} or something else as markup. On the bad side, I was using regular expressions and simple search to carve out things in markers to be expanded. Another annoyance is that…