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use crate::{hint, Parcel, Error, Settings};
use std::io::prelude::*;
impl<T: Parcel> Parcel for Option<T>
{
const TYPE_NAME: &'static str = "Option<T>";
fn read_field(read: &mut dyn Read,
settings: &Settings,
_: &mut hint::Hints) -> Result<Self, Error> {
let is_some = bool::read(read, settings)?;
if is_some {
let value = T::read(read, settings)?;
Ok(Some(value))
} else {
Ok(None)
}
}
fn write_field(&self, write: &mut dyn Write,
settings: &Settings,
_: &mut hint::Hints) -> Result<(), Error> {
self.is_some().write(write, settings)?;
if let Some(ref value) = *self {
value.write(write, settings)?;
}
Ok(())
}
}