ltk_meta 0.6.1

Metadata formats and utilities for League Toolkit
Documentation 
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use crate::{
    property::{Kind, NoMeta},
    traits::{PropertyExt, PropertyValueExt, ReadProperty, WriteProperty},
};

#[cfg_attr(
    feature = "serde",
    derive(serde::Serialize, serde::Deserialize),
    serde(bound = "for <'dee> M: serde::Serialize + serde::Deserialize<'dee>")
)]
#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug, Default)]
pub struct None<M = NoMeta> {
    pub meta: M,
}
impl<M> PropertyValueExt for None<M> {
    const KIND: Kind = Kind::None;
}
impl<M> PropertyExt for None<M> {
    fn size_no_header(&self) -> usize {
        0
    }

    type Meta = M;
    fn meta(&self) -> &Self::Meta {
        &self.meta
    }
    fn meta_mut(&mut self) -> &mut Self::Meta {
        &mut self.meta
    }
}

impl<M> None<M> {
    #[inline(always)]
    #[must_use]
    pub fn new(meta: M) -> Self {
        Self { meta }
    }

    #[inline(always)]
    #[must_use]
    pub fn no_meta(self) -> None<NoMeta> {
        None { meta: NoMeta }
    }
}

impl<M: Default> ReadProperty for None<M> {
    fn from_reader<R: std::io::Read + std::io::Seek + ?Sized>(
        _reader: &mut R,
        _legacy: bool,
    ) -> Result<Self, crate::Error> {
        Ok(Self { meta: M::default() })
    }
}
impl<M> WriteProperty for None<M> {
    fn to_writer<R: std::io::Write + std::io::Seek + ?Sized>(
        &self,
        _writer: &mut R,
        _legacy: bool,
    ) -> Result<(), std::io::Error> {
        Ok(())
    }
}