bisectable6

query

enum E <one>; role R { has $.e = one; method m() { say $!e ~~ one; } }; R.new.m;

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,
  2017.04.3,2017.05,2017.06,2017.07,2017.08,2017.09»:
True

¦«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,HEAD(093009a)»:
False