==================
boolean_basic
==================
&
|
---

(source_file
    (boolean) (Gap)
    (boolean)
)

==================
boolean_alias
==================
.y
.n
---

(source_file
    (boolean) (Gap)
    (boolean)
)

==================
boolean_term
==================
%|
%&
%.y
%.n
---

(source_file
    (term (boolean)) (Gap)
    (term (boolean)) (Gap)
    (term (boolean)) (Gap)
    (term (boolean))
)

