# Test modules + inclusions 1

> Module Mod_def

```catala-metadata
declaration enumeration Enum1:
  -- Yes
  -- No
  -- Maybe

declaration structure Str1:
  data fld1 content Enum1
  data fld2 content integer

declaration scope S:
  output sr content money
  output e1 content Enum1

declaration half content decimal
  depends on x content integer
  equals x / 2

declaration maybe content Enum1
  depends on x content Enum1
```

```catala
scope S:
  definition sr equals $1,000
  definition e1 equals Maybe


declaration maybe content Enum1
  depends on x content Enum1
  equals Maybe
```



```catala-test-inline
$ catala Typecheck --check-invariants
┌─[RESULT]─
│ All invariant checks passed
└─
┌─[RESULT]─
│ Typechecking successful!
└─
```

```catala-test-inline
$ catala typecheck --disable-warnings
┌─[RESULT]─
│ Typechecking successful!
└─
```

```catala-test { id="ml" }
$ catala ocaml --disable-warnings
```