You do not have to do such clumsy things to build from nothing. Split the input by whitespaces, lookup word definitions in a table (linked list is ok), push the

You do not have to do such clumsy things to build from nothing. Split the input by whitespaces, lookup word definitions in a table (linked list is ok), push the addresses of the found words to the output stream as call instructions or execute immediately if marked so. That's it, a minimal direct threaded Forth compiler is done.