A lot of people that talk about building their own programming language, have a lot of lofty goals for them. They want them to have this feature, that feature, to conquer the world and back.
Me? not so much. I'm building one just to learn how to do it "for real". Sure, I have some opinions about what features I would like more. I would use them as goals for the whole project, not just as design goals for the language.
So what are my goals, well...
I want to build it using Rust: I've been trying to learn Rust for a long time now, and while I've learnt a lot, built a few side projects here and there, there's still a lot I don't know. So I thought, "Why not just go for it and throw myself in the deep end", and that's what I'll be doing. Using Rust to build the language and learn Rust as I move along.
Truly experience how to build a compiler: Sure I've learnt how to do so at university, wrote some code for building automata etc. But nothing beats the experience of actually building it all on your own.
Have a Lisp like syntax: This is really not a big deal. I've recently been diving into Lisp dialects and I like some concepts and some syntax in it, so I'll try adding some of those in my language.
Be fast and support multiple platforms: I don't think there's much benefit building a programming language that's painfully slow to use. To make it fast I want it to be a compiled language (as opposed to an interpreted one), Rust also helps in this area as it is pretty fast. Since it's also going to be multi-platform, I will be using LLVM because I don't want to be dealing with any assembly code and optimisations yet.
Be usable at every step of development: I will be gradually adding features, but I want every feature made to be able to show me some visible output.
Like the image above, I want each step in the development process be able to take me from source code to program in some way or another. Instead of building perfect separate components like the perfect parser and perfect lexer that on their own cannot (obviously) get me from source to program. I want to build a lexer than kinda works and a parser that kinda works (and so on) which combined can get me from source code to executable program.
I hope I come out the other side, having a lot more knowledge in this area than I do now (which is really tiny).
See you around!