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/// When implement [`VfsNodeOps`] on a directory node, add dummy file operations
/// that just return an error.
///
/// [`VfsNodeOps`]: crate::VfsNodeOps
#[macro_export]
macro_rules! impl_vfs_dir_default {
    () => {
        fn read_at(&self, _offset: u64, _buf: &mut [u8]) -> $crate::VfsResult<usize> {
            $crate::__priv::ax_err!(IsADirectory)
        }

        fn write_at(&self, _offset: u64, _buf: &[u8]) -> $crate::VfsResult<usize> {
            $crate::__priv::ax_err!(IsADirectory)
        }

        fn fsync(&self) -> $crate::VfsResult {
            $crate::__priv::ax_err!(IsADirectory)
        }

        fn truncate(&self, _size: u64) -> $crate::VfsResult {
            $crate::__priv::ax_err!(IsADirectory)
        }

        #[inline]
        fn as_any(&self) -> &dyn core::any::Any {
            self
        }
    };
}

/// When implement [`VfsNodeOps`] on a non-directory node, add dummy directory
/// operations that just return an error.
///
/// [`VfsNodeOps`]: crate::VfsNodeOps
#[macro_export]
macro_rules! impl_vfs_non_dir_default {
    () => {
        fn lookup(
            self: $crate::__priv::Arc<Self>,
            _path: &str,
        ) -> $crate::VfsResult<$crate::VfsNodeRef> {
            $crate::__priv::ax_err!(NotADirectory)
        }

        fn create(&self, _path: &str, _ty: $crate::VfsNodeType) -> $crate::VfsResult {
            $crate::__priv::ax_err!(NotADirectory)
        }

        fn remove(&self, _path: &str) -> $crate::VfsResult {
            $crate::__priv::ax_err!(NotADirectory)
        }

        fn read_dir(
            &self,
            _start_idx: usize,
            _dirents: &mut [$crate::VfsDirEntry],
        ) -> $crate::VfsResult<usize> {
            $crate::__priv::ax_err!(NotADirectory)
        }

        #[inline]
        fn as_any(&self) -> &dyn core::any::Any {
            self
        }
    };
}