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use std::convert::{TryFrom, TryInto};
use std::fmt;
use serde::{de::Error as _, Deserialize, Deserializer, Serialize, Serializer};
use crate::{Error, Kind};
#[derive(Copy, Clone, Debug, Eq, PartialEq, PartialOrd, Ord, Default)]
pub struct Power(u64);
impl fmt::Display for Power {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{}", self.value())
}
}
impl TryFrom<i64> for Power {
type Error = Error;
fn try_from(value: i64) -> Result<Self, Self::Error> {
Ok(Power(value.try_into().map_err(|_| Kind::NegativePower)?))
}
}
impl From<Power> for i64 {
fn from(value: Power) -> Self {
value.value() as i64
}
}
impl TryFrom<u64> for Power {
type Error = Error;
fn try_from(value: u64) -> Result<Self, Self::Error> {
if value > i64::MAX as u64 {
return Err(Kind::IntegerOverflow.into());
}
Ok(Power(value))
}
}
impl From<Power> for u64 {
fn from(value: Power) -> Self {
value.value()
}
}
impl From<u32> for Power {
fn from(value: u32) -> Self {
Power(value as u64)
}
}
impl From<u16> for Power {
fn from(value: u16) -> Self {
Power(value as u64)
}
}
impl From<u8> for Power {
fn from(value: u8) -> Self {
Power(value as u64)
}
}
impl Power {
pub fn value(self) -> u64 {
self.0
}
pub fn is_zero(self) -> bool {
self.0 == 0
}
}
impl<'de> Deserialize<'de> for Power {
fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
Ok(Power(
String::deserialize(deserializer)?
.parse::<i64>()
.map_err(|e| D::Error::custom(format!("{}", e)))?
.try_into()
.map_err(|e| D::Error::custom(format!("{}", e)))?,
))
}
}
impl Serialize for Power {
fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
let proto_int: i64 = (*self).into();
proto_int.to_string().serialize(serializer)
}
}