HList-0.3.0: examples/pun.ref

similar:
(3,Record{a=3})
(3,Record{a=3})
3

expression QQ:
Record{r=Record{b=Record{a=3},c="c",x=1,y="hi"}}
Record{r=Record{b=Record{a=3},c=1,y="hi"}}
Record{r=Record{x=1,y="hi"}}