chrono-tz 0.8.1

use ::timezone_impl::{TimeSpans, FixedTimespanSet, FixedTimespan};
use std::fmt::{Debug, Formatter, Error};

use std::str::FromStr;

#[derive(Clone, Copy, PartialEq, Eq)]
pub enum Tz {
    America__New_York,
    America__Toronto,
    Europe__London,
    Europe__Moscow,
    Europe__Rome,
}

// Perfect hash table of timezone string -> Tz
static TIMEZONES: phf::Map<&'static str, Tz> = /* ... */

impl FromStr for Tz {
    type Err = String;
    fn from_str(s: &str) -> Result<Self, String> {
        TIMEZONES.get(s).cloned().ok_or(s.to_string())
    }
}

impl Debug for Tz {
    fn fmt(&self, f: &mut Formatter) -> Result<(), Error> {
        match *self {
            Tz::America__New_York => write!(f, "America/New_York"),
            Tz::America__Toronto => write!(f, "America/Toronto"),
            Tz::Europe__London => write!(f, "Europe/London"),
            Tz::Europe__Moscow => write!(f, "Europe/Moscow"),
            Tz::Europe__Rome => write!(f, "Europe/Rome"),
         }
    }
}

impl TimeSpans for Tz {
    fn timespans(&self) -> FixedTimespanSet {
        match *self {
            Tz::America__New_York => {
                const REST: &'static [(i64, FixedTimespan)] = &[
                    (-2717650800, FixedTimespan { utc_offset: -18000, dst_offset: 0, name: "EST" }),
                    (-1633280400, FixedTimespan { utc_offset: -18000, dst_offset: 3600, name: "EDT" }),
                    (-1615140000, FixedTimespan { utc_offset: -18000, dst_offset: 0, name: "EST" }),
                ];
                FixedTimespanSet {
                    first: FixedTimespan {
                        utc_offset: -17762,
                        dst_offset: 0,
                        name: "LMT",
                    },
                    rest: REST
                }
            },

            Tz::America__Toronto => {
                const REST: &'static [(i64, FixedTimespan)] = &[
                    (-2366736148, FixedTimespan { utc_offset: -18000, dst_offset: 0, name: "EST" }),
                    (-1632070800, FixedTimespan { utc_offset: -18000, dst_offset: 3600, name: "EDT" }),
                    (-1615140000, FixedTimespan { utc_offset: -18000, dst_offset: 0, name: "EST" }),
                ];
                FixedTimespanSet {
                    first: FixedTimespan {
                        utc_offset: -19052,
                        dst_offset: 0,
                        name: "LMT",
                    },
                    rest: REST
                }
            },

            Tz::Europe__London => {
                const REST: &'static [(i64, FixedTimespan)] = &[
                    (-3852662325, FixedTimespan { utc_offset: 0, dst_offset: 0, name: "GMT" }),
                    (-1691964000, FixedTimespan { utc_offset: 0, dst_offset: 3600, name: "BST" }),
                    (-1680472800, FixedTimespan { utc_offset: 0, dst_offset: 0, name: "GMT" }),
                ];
                FixedTimespanSet {
                    first: FixedTimespan {
                        utc_offset: -75,
                        dst_offset: 0,
                        name: "LMT",
                    },
                    rest: REST
                }
            },

            Tz::Europe__Moscow => {
                const REST: &'static [(i64, FixedTimespan)] = &[
                    (-2840149817, FixedTimespan { utc_offset: 9017, dst_offset: 0, name: "MMT" }),
                    (-1688265017, FixedTimespan { utc_offset: 9079, dst_offset: 0, name: "MMT" }),
                    (-1656819079, FixedTimespan { utc_offset: 9079, dst_offset: 3600, name: "MST" }),
                ];
                FixedTimespanSet {
                    first: FixedTimespan {
                        utc_offset: 9017,
                        dst_offset: 0,
                        name: "LMT",
                    },
                    rest: REST
                }
            },

            Tz::Europe__Rome => {
                const REST: &'static [(i64, FixedTimespan)] = &[
                    (-3259097396, FixedTimespan { utc_offset: 2996, dst_offset: 0, name: "RMT" }),
                    (-2403564596, FixedTimespan { utc_offset: 3600, dst_offset: 0, name: "CET" }),
                    (-1690851600, FixedTimespan { utc_offset: 3600, dst_offset: 3600, name: "CEST" }),
                ];
                FixedTimespanSet {
                    first: FixedTimespan {
                        utc_offset: 2996,
                        dst_offset: 0,
                        name: "LMT",
                    },
                    rest: REST
                }
            },

         }
    }
}