-- in.cue --
{
	[string]: _
	foo:      3
}
-- out/def --
foo: 3
...
-- out/export --
foo: 3
-- out/yaml --
foo: 3
-- out/json --
{"foo":3}
-- out/compile --
--- in.cue
{
  {
    [string]: _
    foo: 3
  }
}
-- out/eval/stats --
Leaks:  0
Freed:  2
Reused: 0
Allocs: 2
Retain: 0

Unifications: 2
Conjuncts:    4
Disjuncts:    2
-- out/eval --
(struct){
  foo: (int){ 3 }
}
