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lib/cldr/protocol_implementations.ex

defimpl String.Chars, for: Cldr.Unit do
def to_string(unit) do
unless default_backend = Application.get_env(:ex_cldr_units, :default_backend) do
raise RuntimeError, "The String.Chars protocol that implements to_string/1 " <>
"requires that a default Cldr backend be configured in config.exs or placed " <>
"in the application environment. For example:\n\n" <>
"config :ex_cldr_units\n default_backend: MyApp.Cldr\n"
end
Cldr.Unit.to_string!(unit, default_backend)
end
end
defimpl Inspect, for: Cldr.Unit do
def inspect(unit, _opts) do
"#Unit<#{inspect(unit.unit)}, #{inspect(unit.value)}>"
end
end