I read that TeX was written in SAIL and re-writen in Pascal. Do we still use that version today? In my Linux distribution, I use TeX-Live. Does that also use the Pascal version?
I don't quite totally agree, since certain layout features are quite difficult to execute, and what if I don't like Pascal?
For my first issue, it may be possible to learn TeX (rather than LaTeX) and address these graphic design issues myself. Still I am rather curious about to layers, thanks.
From blog Implementing TeX in Clojure:
TeX source code is full of examples of what would not be considered good programming style today, such as:
- global variables
- one-character variables
- goto statements
- procedures spanning hundreds of lines;
- lots of macros;
- duplicate code;
- local variable reuse;
- single-threaded assumption is “everywhere”;
- mutability is just “pervasive”