fend-core 1.1.4

Arbitrary-precision unit-aware calculator
Documentation 
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use crate::{
    error::FendError,
    serialize::{deserialize_u8, serialize_u8},
};
use std::{fmt, io};

#[derive(Clone, Copy, PartialEq, Eq)]
pub(crate) enum DayOfWeek {
    Sunday,
    Monday,
    Tuesday,
    Wednesday,
    Thursday,
    Friday,
    Saturday,
}

impl fmt::Debug for DayOfWeek {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        let s = match self {
            Self::Sunday => "Sunday",
            Self::Monday => "Monday",
            Self::Tuesday => "Tuesday",
            Self::Wednesday => "Wednesday",
            Self::Thursday => "Thursday",
            Self::Friday => "Friday",
            Self::Saturday => "Saturday",
        };
        write!(f, "{s}")
    }
}

impl DayOfWeek {
    pub(crate) fn as_u8(self) -> u8 {
        match self {
            Self::Sunday => 0,
            Self::Monday => 1,
            Self::Tuesday => 2,
            Self::Wednesday => 3,
            Self::Thursday => 4,
            Self::Friday => 5,
            Self::Saturday => 6,
        }
    }

    pub(crate) fn serialize(self, write: &mut impl io::Write) -> Result<(), FendError> {
        serialize_u8(self.as_u8(), write)?;
        Ok(())
    }

    pub(crate) fn deserialize(read: &mut impl io::Read) -> Result<Self, FendError> {
        Ok(match deserialize_u8(read)? {
            0 => Self::Sunday,
            1 => Self::Monday,
            2 => Self::Tuesday,
            3 => Self::Wednesday,
            4 => Self::Thursday,
            5 => Self::Friday,
            6 => Self::Saturday,
            _ => return Err(FendError::DeserializationError),
        })
    }
}

impl fmt::Display for DayOfWeek {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "{self:?}")
    }
}