wehub-resource-sync
80 lines
5.8 KiB
Elixir
80 lines
5.8 KiB
Elixir
defmodule ExampleApp do
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# Module attributes
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@default_timeout 5000
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@version "1.0.0"
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# Protocol definition
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defprotocol Formatter do
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@doc "Format the data for display"
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def format(data)
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end
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# Protocol implementation
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defimpl Formatter, for: Map do
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def format(data) do
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inspect(data, pretty: true)
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end
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end
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# Struct definition
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defstruct name: "", age: 0, email: nil
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# Exception definition
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defexception message: "A custom error occurred"
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# Callback definition
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@callback process(term) :: {:ok, term} | {:error, term}
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@macrocallback validate(term) :: Macro.t()
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# Public function
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def calculate_age(birth_year) when is_integer(birth_year) do
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current_year = DateTime.utc_now().year
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current_year - birth_year
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end
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# Private function
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defp validate_email(email) do
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String.match?(email, ~r/^[^\s]+@[^\s]+\.[^\s]+$/)
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end
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# Function with pattern matching
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def handle_result({:ok, value}), do: "Success: #{value}"
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def handle_result({:error, reason}), do: "Error: #{reason}"
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def handle_result(_), do: "Unknown result"
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# Macro definition
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defmacro debug(expression) do
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quote do
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IO.puts "Debug: #{inspect(unquote(expression))}"
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end
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end
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# Private macro
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defmacrop log(message) do
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quote do
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IO.puts("[#{__MODULE__}] #{unquote(message)}")
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end
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end
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# Guard definition
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defguard is_positive(value) when is_integer(value) and value > 0
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defguardp is_even(value) when is_integer(value) and rem(value, 2) == 0
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# Function delegation
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defdelegate parse_int(string), to: String, as: :to_integer
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# Overridable function
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defoverridable [process: 1]
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# Using with for complex operations
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def create_user(params) do
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with {:ok, name} <- Map.fetch(params, "name"),
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{:ok, email} <- Map.fetch(params, "email"),
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true <- validate_email(email) do
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%ExampleApp{name: name, email: email}
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else
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:error -> {:error, "Missing required fields"}
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false -> {:error, "Invalid email format"}
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end
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end
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end |