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mod center_order {
use serde::de::{Deserializer, Deserialize, Error as SerdeError};
use serde::ser::{Serializer, Serialize};
use self::super::super::Error;
use bidir_map::BidirMap;
use std::str::FromStr;
use unicase::UniCase;
use std::fmt;
lazy_static! {
static ref NAME_ORDER_MAP: BidirMap<UniCase<&'static str>, CenterOrder> = bidir_map!{
UniCase::new("forward") => CenterOrder::Forward,
UniCase::new("backward") => CenterOrder::Backward,
};
static ref ERROR_WHER: String = String::from_utf8(NAME_ORDER_MAP.first_col()
.enumerate()
.map(|(i, v)| (i == NAME_ORDER_MAP.len() - 1, v))
.fold((true, "expected ".as_bytes().to_vec()), |(first, mut acc), (last, el)| {
if !first {
if NAME_ORDER_MAP.len() != 2 {
acc.extend(b",");
}
acc.extend(b" ");
if last {
acc.extend(b"or ");
}
}
acc.extend(b"\"");
acc.extend(el.as_bytes());
acc.extend(b"\"");
(false, acc)
})
.1)
.unwrap();
}
#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq, PartialOrd, Ord)]
pub enum CenterOrder {
Forward,
Backward,
}
impl CenterOrder {
pub fn from(s: &str) -> Option<CenterOrder> {
NAME_ORDER_MAP.get_by_first(&UniCase::new(s)).map(|&k| k)
}
pub fn name(&self) -> &'static str {
NAME_ORDER_MAP.get_by_second(&self).unwrap()
}
}
impl FromStr for CenterOrder {
type Err = Error;
fn from_str(s: &str) -> Result<Self, Self::Err> {
CenterOrder::from(s).ok_or_else(|| {
Error::Parse {
tp: "center order",
wher: ERROR_WHER[..].into(),
more: format!("\"{}\" invalid", s).into(),
}
})
}
}
impl<'de> Deserialize<'de> for CenterOrder {
fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
CenterOrder::from_str(<&'de str>::deserialize(deserializer)?).map_err(|e| {
let buf = e.to_string();
D::Error::custom(&buf[..buf.len() - 1])
})
}
}
impl Serialize for CenterOrder {
fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
serializer.serialize_str(self.name())
}
}
impl fmt::Display for CenterOrder {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
self.name().fmt(f)
}
}
}