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Compose web applications with functions
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lib/plug/conn/unfetched.ex
defmodule Plug.Conn.Unfetched do
@moduledoc """
A struct used as default on unfetched fields.
The `:aspect` key of the struct specifies what field is still unfetched.
## Examples
unfetched = %Plug.Conn.Unfetched{aspect: :cookies}
"""
defstruct [:aspect]
@type t :: %__MODULE__{aspect: atom()}
@doc false
def get(%{aspect: aspect}, key, _value) do
raise ArgumentError, "cannot get key #{inspect key} from conn.#{aspect} because they were not fetched"
end
@doc false
def get_and_update(%{aspect: aspect}, key, _fun) do
raise ArgumentError, "cannot get_and_update key #{inspect key} from conn.#{aspect} because they were not fetched"
end
end