bc

I liked using bc when I was on Ubuntu. I'm cloning it in Rust so that I'll be able to use it in every OS I use.

Also, learning interpreters / compilers.

TODO

• Tokenizer
• AST generation
  • Parser / Compiler rewrite
• Actual interpretation (stack machine)
• Global variables
• Proper error handling.
• Big-Number Arithmetics (scale)
• Functions (define)
  • Local environment for local variables?
  • BUG: Check the arity of the called function. For example sqrt(5, 4) works and generates a PushConstant(4) instruction!
• Standard Library
• UTF-8 support
• Support for econometry stuff?
  • Arrays
  • Statistical Functions
  • What else?