```catala
declaration structure Str:
  data x1 content (integer, date)

declaration enumeration En:
  -- One content Str
  -- Two content (integer, Str)

declaration str content Str equals
  Str { --x1: (12, |2001-01-01|) }

declaration f2 content decimal
  depends on str content Str,
             en content En
  equals
  match en with pattern
  -- One of str1:
     let a equals str.x1.1 in
     let (b, w) equals str1.x1 in
     a / b
  -- Two of z:
     let (z1, z2) equals z in z1 / 2

declaration scope Test:
  output o content (date, decimal)

scope Test:
  definition o equals
      (|2001-01-03|,
        f2 of str, Two content (12, str))
```

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

```catala-test-inline
$ catala test-scope Test
┌─[RESULT]─
│ o = (2001-01-03, 6.0)
└─
```