You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: impl_saveload.rs
    path of file: ./repos/specs/specs-derive/src
    
    the code of the file until where you have to start completion: //! Contains implementations for `#[derive(Saveload)]`
//! which derives `ConvertSaveload`.

// NOTE: All examples given in the documentation below are "cleaned up" into
// readable Rust, so it doesn't give an entirely accurate view of what's
// actually generated.

use proc_macro2::{Span, TokenStream};
use syn::{
    Attribute, DataEnum, DataStruct, DeriveInput, Field, GenericParam, Generics, Ident, Type,
    WhereClause, WherePredicate,
};

/// Handy collection since tuples got unwieldy and
/// unclear in purpose
struct SaveloadDerive {
    type_def: TokenStream,
    ser: TokenStream,
    de: TokenStream,
    saveload_name: Ident,
}

/// The main entrypoint, sets things up and dele
    
fn replace_attributes(attrs: &mut Vec<Attribute>) {
    let output_attrs = attrs
        .iter()
        .filter_map(|attr| {
            if attr.path.is_ident("convert_save_load_skip_convert") {
                None
            } else if attr.path.is_ident("convert_save_load_attr") {
                match attr.parse_args_with(single_parse_outer_from_args) {
                    Ok(inner_attr) => Some(inner_attr),
                    Err(err) => panic!(
                        "Unparseable inner attribute on convert_save_load_attr: {}",
                        err
                    ),
                }
            } else {
                Some(attr.clone())
            }
        })
        .collect::<Vec<_>>();

    *attrs = output_attrs
}