use std::{convert::TryInto, ops::Sub}; use crate::{time::Sign, Time}; /// Instantiationimpl Time {    /// Create a new instance from seconds and offset.    pub fn new(seconds_since_unix_epoch: u32, offset_in_seconds: i32) -> Self {        Time {            seconds_since_unix_epoch,            offset_in_seconds,            sign: offset_in_seconds.into(),        }    }     /// Return the current time without figuring out a timezone offset    pub fn now_utc() -> Self {        let seconds_since_unix_epoch = time::OffsetDateTime::now_utc()            .sub(std::time::SystemTime::UNIX_EPOCH)            .whole_seconds()            .try_into()            .expect("this is not year 2038");        Self {            seconds_since_unix_epoch,            offset_in_seconds: 0,            sign: Sign::Plus,        }    }     /// Return the current local time, or `None` if the local time wasn't available.    pub fn now_local() -> Option<Self> {        let now = time::OffsetDateTime::now_utc();        let seconds_since_unix_epoch = now            .sub(std::time::SystemTime::UNIX_EPOCH)            .whole_seconds()            .try_into()            .expect("this is not year 2038");        // TODO: make this work without cfg(unsound_local_offset), see        //       https://github.com/time-rs/time/issues/293#issuecomment-909158529        let offset_in_seconds = time::UtcOffset::local_offset_at(now).ok()?.whole_seconds();        Self {            seconds_since_unix_epoch,            offset_in_seconds,            sign: offset_in_seconds.into(),        }        .into()    }     /// Return the current local time, or the one at UTC if the local time wasn't available.    pub fn now_local_or_utc() -> Self {        let now = time::OffsetDateTime::now_utc();        let seconds_since_unix_epoch = now            .sub(std::time::SystemTime::UNIX_EPOCH)            .whole_seconds()            .try_into()            .expect("this is not year 2038");        // TODO: make this work without cfg(unsound_local_offset), see        //       https://github.com/time-rs/time/issues/293#issuecomment-909158529        let offset_in_seconds = time::UtcOffset::local_offset_at(now)            .map(|ofs| ofs.whole_seconds())            .unwrap_or(0);        Self {            seconds_since_unix_epoch,            offset_in_seconds,            sign: offset_in_seconds.into(),        }    }}