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use std::cmp::{Ord,Ordering,PartialOrd};
use std::fmt;
#[derive(Clone,Copy,Eq,Hash,PartialEq)]
pub struct FieldTag(pub u64);
impl FieldTag {
pub fn empty() -> Self {
FieldTag(0)
}
pub fn to_bytes(&self) -> Vec<u8> {
let string = self.0.to_string();
string.as_bytes().to_vec()
}
pub fn is_empty(&self) -> bool {
self.0 == 0
}
}
impl fmt::Debug for FieldTag {
fn fmt(&self,f: &mut fmt::Formatter) -> fmt::Result {
write!(f,"{}",self.0)
}
}
impl fmt::Display for FieldTag {
fn fmt(&self,f: &mut fmt::Formatter) -> fmt::Result {
write!(f,"{}",self.0)
}
}
impl Into<Vec<u8>> for FieldTag {
fn into(self) -> Vec<u8> {
self.to_bytes()
}
}
impl Into<u64> for FieldTag {
fn into(self) -> u64 {
self.0
}
}
impl<'a> From<&'a [u8]> for FieldTag {
fn from(bytes: &[u8]) -> Self {
let mut tag = 0;
for byte in bytes {
tag *= 10;
tag += byte.overflowing_sub(48).0 as u64;
}
FieldTag(tag)
}
}
impl From<u64> for FieldTag {
fn from(tag: u64) -> Self {
FieldTag(tag)
}
}
impl PartialOrd for FieldTag {
fn partial_cmp(&self,other: &Self) -> Option<Ordering> {
Some(self.cmp(other))
}
}
impl Ord for FieldTag {
fn cmp(&self,other: &Self) -> Ordering {
self.0.cmp(&other.0)
}
}