# `Ash.Info.Manifest.CustomExpression`
[🔗](https://github.com/ash-project/ash/blob/v3.25.2/lib/ash/info/manifest/custom_expression.ex#L5)

Represents an app-registered custom expression in the filter capabilities catalog.

Built from `Application.get_env(:ash, :custom_expressions, [])` at manifest
generation time. Does not carry a `:returns` field — `Ash.CustomExpression`
has no `returns/0` callback.

# `t`

```elixir
@type t() :: %Ash.Info.Manifest.CustomExpression{
  custom: map(),
  description: String.t() | nil,
  module: module(),
  name: atom(),
  predicate?: boolean(),
  signatures: [Ash.Info.Manifest.ArgumentSignature.t()]
}
```

---

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