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//! <https://github.com/EOSIO/eosio.cdt/blob/4985359a30da1f883418b7133593f835927b8046/libraries/eosiolib/core/eosio/ignore.hpp#L12-L20>
use crate::{NumBytes, Read, ReadError, Write, WriteError};
use core::marker::PhantomData;

impl<T> NumBytes for PhantomData<T> {
    #[inline]
    #[must_use]
    fn num_bytes(&self) -> usize {
        0
    }
}

impl<T> Read for PhantomData<T> {
    #[inline]
    fn read(_bytes: &[u8], _pos: &mut usize) -> Result<Self, ReadError> {
        Ok(Self)
    }
}

impl<T> Write for PhantomData<T> {
    #[inline]
    fn write(
        &self,
        _bytes: &mut [u8],
        _pos: &mut usize,
    ) -> Result<(), WriteError> {
        Ok(())
    }
}

// TODO PhantomPinned