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actor Main
  new create(env: Env) =>
    env.out.print("Hello, world!")

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actor Main
  new create(env: Env) =>
    env.out.print("Hello, world!")

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actor Main
  new create(env: Env) =>
    env.out.print("Hello, world!")

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actor Main
  new create(env: Env) =>
    env.out.print("Hello, world!")

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actor Main
  new create(env: Env) =>
    env.out.print("Hello, world!")

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"""
This is ponyrun - a pony program to compile pony source code files.

It will not properly run in the playground as it expects command line arguments 
and will try to use ponyc and stuff. Checkout the repo to clone and run it on your machine:

https://github.com/mfelsche/ponyrun

It can be used to execute pony source files directly on linux using binfmt_misc. 
Checkout: https://github.com/mfelsche/ponyrun#usage-with-binfmt_misc 

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use "collections"

type RPNArgument is
  ( I64
  | {(I64): I64} val
  | {(I64): String} val
  | {(I64, I64): I64} val )

actor RPN
  """

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actor Main
  new create(env: Env) =>
    var x : List iso = recover
      List(0, List(1, List(2, List.singleton(3))))
    end

    var y : List iso = recover
      List(4, List(5, List(6, List.singleton(7))))
    end

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actor Main
  new create(env: Env) =>
    None

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actor Main
  new create(env: Env) =>
    None