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with



    macro
    boot.janet on line 356, column 1

    (with [binding ctor dtor] & body)
    
    Evaluate body with some resource, which will be automatically cleaned
    up if there is an error in body. binding is bound to the expression
    ctor, and dtor is a function or callable that is passed the binding. If
    no destructor (dtor) is given, will call :close on the resource.


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(os/shell "echo bar > /tmp/foo")
(with
  [file-handle
   (file/open "/tmp/foo")
   (fn [fd] (file/close fd))]
  (file/read file-handle :all))  # => @"bar\n"
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