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mod constants {
pub const CJK_IDEOGRAPH_FIRST: char = '一';
pub const CJK_IDEOGRAPH_LAST: char = '鿯';
}
#[derive(Debug, Clone, Copy, Hash, PartialEq, Eq)]
pub enum CJKUnifiedIdeographs {
CjkIdeographFirst,
CjkIdeographLast,
}
impl Into<char> for CJKUnifiedIdeographs {
fn into(self) -> char {
use constants::*;
match self {
CJKUnifiedIdeographs::CjkIdeographFirst => CJK_IDEOGRAPH_FIRST,
CJKUnifiedIdeographs::CjkIdeographLast => CJK_IDEOGRAPH_LAST,
}
}
}
impl std::convert::TryFrom<char> for CJKUnifiedIdeographs {
type Error = ();
fn try_from(c: char) -> Result<Self, Self::Error> {
use constants::*;
match c {
CJK_IDEOGRAPH_FIRST => Ok(CJKUnifiedIdeographs::CjkIdeographFirst),
CJK_IDEOGRAPH_LAST => Ok(CJKUnifiedIdeographs::CjkIdeographLast),
_ => Err(()),
}
}
}
impl Into<u32> for CJKUnifiedIdeographs {
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 CJKUnifiedIdeographs {
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 CJKUnifiedIdeographs {
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 CJKUnifiedIdeographs {
pub fn new() -> Self {
CJKUnifiedIdeographs::CjkIdeographFirst
}
pub fn name(&self) -> &str {
match self {
CJKUnifiedIdeographs::CjkIdeographFirst => "cjk ideograph first",
CJKUnifiedIdeographs::CjkIdeographLast => "cjk ideograph last",
}
}
}