31 lines
563 B
Text
31 lines
563 B
Text
new_frontend
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namespace Foo
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initialize ref : IO.Ref Nat ← IO.mkRef 10
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initialize vals : IO.Ref (Array String) ← IO.mkRef #[]
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def registerVal (s : String) : IO Unit := do
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if (← vals.get).contains s then
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throw $ IO.userError "value already registered"
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vals.modify (·.push s)
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initialize
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IO.println "started the program"
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ref.modify (· + 20)
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registerVal "hello"
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initialize
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registerVal "world"
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initialize
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registerVal "foo"
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end Foo
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open Foo
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def main : IO Unit := do
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IO.println "hello world"
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IO.println (← ref.get)
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IO.println (← vals.get)
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