docs/reference/fidl/language/error-catalog/_fi-0023.md

## fi-0023: Attribute inside type declaration {:#fi-0023}

With [inline layouts](/docs/reference/fidl/language/language.md#inline-layouts),
you can put attributes directly before the layout. However, when declaring a
type at the top level, you cannot:

{% include "docs/reference/fidl/language/error-catalog/label/_bad.md" %}

```fidl
{% includecode gerrit_repo="fuchsia/fuchsia" gerrit_path="tools/fidl/fidlc/tests/fidl/bad/fi-0023.noformat.test.fidl" exclude_regexp="\/\/ (Copyright 20|Use of|found in).*" %}
```

Instead, you must put attributes before the `type` keyword:

{% include "docs/reference/fidl/language/error-catalog/label/_good.md" %}

```fidl
{% includecode gerrit_repo="fuchsia/fuchsia" gerrit_path="tools/fidl/fidlc/tests/fidl/good/fi-0023.test.fidl" exclude_regexp="\/\/ (Copyright 20|Use of|found in).*" %}
```

We enforce this because it would be confusing to allow attributes in two places.