Settings View Source Credo.Check.Readability.PredicateFunctionNames (Credo v1.7.0)

This check has a base priority of high and works with any version of Elixir.

explanation

Explanation

Predicate functions/macros should be named accordingly:

• For functions, they should end in a question mark.

  # preferred

  defp user?(cookie) do end

  defp has_attachment?(mail) do end

  # NOT preferred

  defp is_user?(cookie) do end

  defp is_user(cookie) do end

• For guard-safe macros they should have the prefix is_ and not end in a question mark.

  # preferred

  defmacro is_user(cookie) do end

  # NOT preferred

  defmacro is_user?(cookie) do end

  defmacro user?(cookie) do end

Like all Readability issues, this one is not a technical concern. But you can improve the odds of others reading and liking your code by making it easier to follow.

check-specific-parameters

Check-Specific Parameters

There are no specific parameters for this check.

general-parameters

General Parameters

Like with all checks, general params can be applied.

Parameters can be configured via the .credo.exs config file.