process/step0_repl.txt

   1 --- step0_repl ----------------------------------
   2 READ(str): return str
   3
   4 EVAL(ast,env): return ast
   5
   6 PRINT(exp): return exp
   7
   8 rep(str): return PRINT(EVAL(READ(str),""))
   9
  10 main loop: println(rep(readline("user> ")))
  11