View Source Credo.Check.Consistency.ParameterPatternMatching (Credo v1.7.5)


This check is enabled by default.

Learn how to disable it via .credo.exs.

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


When capturing a parameter using pattern matching you can either put the parameter name before or after the value i.e.

def parse({:ok, values} = pair)


def parse(pair = {:ok, values})

Neither of these is better than the other, but it seems a good idea not to mix the two patterns in the same codebase.

While this is not necessarily a concern for the correctness of your code, you should use a consistent style throughout your codebase.

Check-Specific Parameters

Use the following parameters to configure this check:


Force a choice, values can be :after or :before.

This parameter defaults to nil.

General Parameters

Like with all checks, general params can be applied.

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