bisectable6

query

my $a := "a" | "b" | ("c" | "d"); my $b := "f" | "g"; dd $a ~ $b

result

¦«2015.12,2016.01.1,2016.02,2016.03,2016.04,2016.05,2016.06,2016.07.1,
  2016.08.1,2016.09,2016.10,2016.11,2016.12,2017.01,2017.02,2017.03,
  2017.04.3,2017.05,2017.06,2017.07,2017.08»:
"any(\"a\", \"b\", any(\"c\", \"d\"))any(\"f\", \"g\")"

¦«2017.09,2017.10,2017.11,2017.12,2018.01,2018.02.1,2018.03,2018.04.1,
  2018.05,2018.06,2018.08,2018.09,2018.10,2018.11,2018.12,2019.03.1,
  2019.07.1,2019.11,2020.01,2020.02.1,2020.05.1,2020.06,2020.07,2020.08.2,
  2020.09,2020.10,2020.11,2020.12,2021.02.1,2021.03,2021.04,2021.05,
  2021.06,2021.07,2021.08,2021.09,2021.10,2021.12,2022.02,2022.03,2022.04,
  2022.06,2022.07,2022.12,2023.02,2023.04,2023.05,2023.06,2023.08,2023.09,
  2023.10,2023.11,2023.12,2024.01,2024.02,2024.03,2024.04,2024.05,2024.06,
  2024.07,2024.08,2024.09,2024.10,2024.12,2025.01,2025.02,2025.03,2025.04,
  2025.05,2025.06.1,2025.08,2025.10,2025.11,2025.12,HEAD(c3815a4)»:
This type cannot unbox to a native string: P6opaque, Junction
  in block <unit> at /tmp/Hsr3pWQxfZ line 1

 «exit code = 1»