STAKAN

STAKAN interprets a Forth-like language. Uses a somewhat heavy long double stack.

Goals

I am writing STAKAN to:

• learn principles of concatenative languages
• implement something real in C (previously I tried to make a Lisp in C and that didn't go quite well)
• understand how compilers work
• have some fun during the summer

Progress

• Read words
• Parse words into tokens
• Evaluate words
• Implement some primeops
• Implement : and ;
• Implement branch and branch?
• Implement if, then, else
• Implement the until loop
• Implement all Forth primitives
• Write a useful standard library (maybe, some web server - stuff)
• Get the code reviewed by someone who is proficient in C
• ...

Custom words

You can define your own words both in run-time or at compile-time.

Run-time words are defined in STAKAN itself by using : (...) ; construction:

: double 2 * ;
: quad double double ;

Compile-time native words are defined in C language using convenience macros defined in nwords.h:

NWORD(double) {
  PUSH(2);
  MUL();
}

NWORD(quad) {
  DOUBLE();
  DOUBLE();
}

Try it out

To compile and run:

git clone https://github.com/ksixty/stakan && cd stakan && make run