crystal/step0_repl.cr

   1 #! /usr/bin/env crystal run
   2
   3 require "readline"
   4
   5 # Note:
   6 # Employed downcase names because Crystal prohibits uppercase names for methods
   7
   8 def read(x)
   9   x
  10 end
  11
  12 def eval(x)
  13   x
  14 end
  15
  16 def print(x)
  17   x
  18 end
  19
  20 def rep(x)
  21   read(eval(print(x)))
  22 end
  23
  24 while line = Readline.readline("user> ")
  25   puts rep(line)
  26 end