Embedded Language

• Wren: https://wren.io

  System.print("Hello, world!")
  
  class Wren {
    flyTo(city) {
      System.print("Flying to %(city)")
    }
  }
  
  var adjectives = Fiber.new {
    ["small", "clean", "fast"].each {|word| Fiber.yield(word) }
  }
  
  while (!adjectives.isDone) System.print(adjectives.call())