%a{annotate:rdoc:skip}
class Dir
  # <!--
  #   rdoc-file=lib/tmpdir.rb
  #   - tmpdir()
  # -->
  # Returns the operating system's temporary file path.
  #
  def self.tmpdir: () -> String

  # <!--
  #   rdoc-file=lib/tmpdir.rb
  #   - mktmpdir(prefix_suffix=nil, *rest, **options) { |dup| ... }
  # -->
  # Dir.mktmpdir creates a temporary directory.
  #
  # The directory is created with 0700 permission. Application should not change
  # the permission to make the temporary directory accessible from other users.
  #
  # The prefix and suffix of the name of the directory is specified by the
  # optional first argument, *prefix_suffix*.
  # *   If it is not specified or nil, "d" is used as the prefix and no suffix is
  #     used.
  # *   If it is a string, it is used as the prefix and no suffix is used.
  # *   If it is an array, first element is used as the prefix and second element
  #     is used as a suffix.
  #
  #
  #     Dir.mktmpdir {|dir| dir is ".../d..." }
  #     Dir.mktmpdir("foo") {|dir| dir is ".../foo..." }
  #     Dir.mktmpdir(["foo", "bar"]) {|dir| dir is ".../foo...bar" }
  #
  # The directory is created under Dir.tmpdir or the optional second argument
  # *tmpdir* if non-nil value is given.
  #
  #     Dir.mktmpdir {|dir| dir is "#{Dir.tmpdir}/d..." }
  #     Dir.mktmpdir(nil, "/var/tmp") {|dir| dir is "/var/tmp/d..." }
  #
  # If a block is given, it is yielded with the path of the directory. The
  # directory and its contents are removed using FileUtils.remove_entry before
  # Dir.mktmpdir returns. The value of the block is returned.
  #
  #     Dir.mktmpdir {|dir|
  #       # use the directory...
  #       open("#{dir}/foo", "w") { something using the file }
  #     }
  #
  # If a block is not given, The path of the directory is returned. In this case,
  # Dir.mktmpdir doesn't remove the directory.
  #
  #     dir = Dir.mktmpdir
  #     begin
  #       # use the directory...
  #       open("#{dir}/foo", "w") { something using the file }
  #     ensure
  #       # remove the directory.
  #       FileUtils.remove_entry dir
  #     end
  #
  def self.mktmpdir: (?String | [ String, String ] | nil, ?String?, ?max_try: Integer?) -> String
                   | [X] (?String | [ String, String ] | nil, ?String?, ?max_try: Integer?) { (String) -> X } -> X
end