use super::{THE_HEAVENLY_STEMS, THE_HEAVENLY_STEMS_CHARS};
use std::mem::transmute;
use std::fmt::{self, Display, Formatter};
use std::str::FromStr;
#[derive(Debug, PartialOrd, Ord, PartialEq, Clone, Eq, Hash, Copy)]
pub enum HeavenlyStems {
First,
Second,
Third,
Fourth,
Fifth,
Sixth,
Seventh,
Eighth,
Ninth,
Tenth,
}
impl HeavenlyStems {
#[allow(clippy::missing_safety_doc)]
#[inline]
pub unsafe fn from_ordinal_unsafe(number: i8) -> HeavenlyStems {
transmute(number)
}
#[allow(clippy::should_implement_trait)]
#[inline]
pub fn from_str<S: AsRef<str>>(s: S) -> Option<HeavenlyStems> {
let s = s.as_ref();
for (i, &t) in THE_HEAVENLY_STEMS.iter().enumerate() {
if t == s {
return Some(unsafe { Self::from_ordinal_unsafe(i as i8) });
}
}
None
}
#[inline]
pub fn to_str(self) -> &'static str {
let i = self as usize;
THE_HEAVENLY_STEMS[i]
}
#[inline]
pub fn from_char(c: char) -> Option<HeavenlyStems> {
for (i, t) in THE_HEAVENLY_STEMS_CHARS.iter().copied().enumerate() {
if t == c {
return Some(unsafe { Self::from_ordinal_unsafe(i as i8) });
}
}
None
}
#[inline]
pub fn to_char(self) -> char {
let i = self as usize;
THE_HEAVENLY_STEMS_CHARS[i]
}
}
impl Display for HeavenlyStems {
#[inline]
fn fmt(&self, f: &mut Formatter) -> Result<(), fmt::Error> {
f.write_str(self.to_str())
}
}
impl FromStr for HeavenlyStems {
type Err = ();
#[inline]
fn from_str(s: &str) -> Result<Self, Self::Err> {
HeavenlyStems::from_str(s).ok_or(())
}
}