# `Bylaw.Credo.Check.Elixir.NoCatchAllInWithElse`
[🔗](https://github.com/ryanzidago/bylaw/blob/v0.1.0-alpha.1/lib/bylaw/credo/check/elixir/no_catch_all_in_with_else.ex#L1)

## Basics

> #### This check is disabled by default. {: .neutral}
>
> [Learn how to enable it](`e:credo:config_file.html#checks`) via `.credo.exs`.

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

## Explanation

Prefer explicit pattern matches in `with` else clauses over catch-all variables.

## Examples

Each `else` branch should match a specific pattern so that success and failure
paths are clearly separated.
Avoid:

      with {:ok, user} <- fetch_user(id) do
        {:ok, user}
      else
        error -> error
      end

Prefer:

      with {:ok, user} <- fetch_user(id) do
        {:ok, user}
      else
        {:error, error} -> {:error, error}
      end

## Notes

This check uses static AST analysis, so it favors clear source-level patterns over runtime behavior.

## Options

This check has no check-specific options. Configure it with an empty option list.

## Usage

Add this check to Credo's `checks:` list in `.credo.exs`:

```elixir
%{
  configs: [
    %{
      name: "default",
      checks: [
        {Bylaw.Credo.Check.Elixir.NoCatchAllInWithElse, []}
      ]
    }
  ]
}
```

## Check-Specific Parameters

*There are no specific parameters for this check.*

## General Parameters

Like with all checks, [general params](`e:credo:check_params.html`) can be applied.

Parameters can be configured via the [`.credo.exs` config file](`e:credo:config_file.html`).

---

*Consult [api-reference.md](api-reference.md) for complete listing*