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mod constants {
pub const PRIVATE_USE_FIRST: char = '';
}
#[derive(Debug, Clone, Copy, Hash, PartialEq, Eq)]
pub enum PrivateUseArea {
PrivateUseFirst,
}
impl Into<char> for PrivateUseArea {
fn into(self) -> char {
use constants::*;
match self {
PrivateUseArea::PrivateUseFirst => PRIVATE_USE_FIRST,
}
}
}
impl std::convert::TryFrom<char> for PrivateUseArea {
type Error = ();
fn try_from(c: char) -> Result<Self, Self::Error> {
use constants::*;
match c {
PRIVATE_USE_FIRST => Ok(PrivateUseArea::PrivateUseFirst),
_ => Err(()),
}
}
}
impl Into<u32> for PrivateUseArea {
fn into(self) -> u32 {
let c: char = self.into();
let hex = c
.escape_unicode()
.to_string()
.replace("\\u{", "")
.replace("}", "");
u32::from_str_radix(&hex, 16).unwrap()
}
}
impl std::convert::TryFrom<u32> for PrivateUseArea {
type Error = ();
fn try_from(u: u32) -> Result<Self, Self::Error> {
if let Ok(c) = char::try_from(u) {
Self::try_from(c)
} else {
Err(())
}
}
}
impl Iterator for PrivateUseArea {
type Item = Self;
fn next(&mut self) -> Option<Self> {
let index: u32 = (*self).into();
use std::convert::TryFrom;
Self::try_from(index + 1).ok()
}
}
impl PrivateUseArea {
pub fn new() -> Self {
PrivateUseArea::PrivateUseFirst
}
pub fn name(&self) -> &str {
match self {
PrivateUseArea::PrivateUseFirst => "private use first",
}
}
}