☕ coffeebean

A compiler written in Rust.

What the heck is this?

This is just a (small?) project I'm working on. I don't have a clear goal at this point. I'll try to update this repo on a weekly basis.

Why??

Well it all started with this:

"There are two kinds of programmers — those who have written compilers and those who haven't."
-Terry A. Davis

No, actually...
I am learning compiler design at college this semester so I thought this might be a good time to try building a compiler from scratch. It took me 4 days to write a simple comiler that can convert...

return 70;

...this, to...

global _start
_start:
    mov rax, 60
    mov rdi, 70
    syscall

...this.

But why rust?

Because I don't know Rust and I felt this might be a good chance to learn the language 🤷‍♂️

Coffeebean????

I like love coffee ♥

---

Usage

1. To begin with, you must have a *.cb file (actually, any plaintext file will do, but the extension makes it look awesome, for the time being). Write a C-like return statement:

   return 20;

2. Pass this file as an argument.

   cargo run <file.cb>

3. It will create an out.asm file. In order to create the binary, run this command (you might need to install nasm and ld packages first):

   nasm -felf64 out.asm && ld out.o -o out

4. Now run the binary

   ./out

5. It won't print anything as it calls only the exit syscall with a return value (20 in this case). To check the return value, run:

   echo $?

   It should print 20.