`derive(SystemParam)` should allow `'world` and `'state` lifetime names

[frewsxcv]

Right now it forces you to use 'w and 's, which is less descriptive and ambiguous

[Wuketuke]

i experimented by trying to replace every occurance of 'world and 'state with their abbreviations in bevy_ecs/macros/src/lib.rs by creating a new function (and stealing code from https://stackoverflow.com/questions/71447695/how-to-modify-all-string-literals-with-a-proc-macro-attribute-in-rust)

fn replace_lifetime(input: TokenStream, from: Ident, to: Ident) -> TokenStream {
    input
        .into_iter()
        .map(|x| {
            match x {
                TokenTree::Group(group) => {
                    let new_group = Group::new(
                        group.delimiter(),
                        replace_lifetime(group.stream(), from.clone(), to.clone()),
                    );
                    TokenTree::Group(new_group)
                }
                TokenTree::Ident(ident) => {
                    let new_ident = if ident.to_string() == to.to_string() {                        
                        to.clone() 
                    } else {
                        ident
                    };
                    TokenTree::Ident(new_ident)
                }
                v => v,
            }
        })
        .collect()
}

you might say this is stupid. you might say it is a hack. you might also say that it doesnt even compile. youre right on all three of them.

The problem is that this macro adds other stuff in that struct with the lifetimes 'w or 's, so replacing 'world and 'state is the only option. But then i would need to change every occurrence of these identifiers in the struct, and only ever touch lifetime parameters.
And this function mixes proc_macro with proc_macro2, which is why it wont compile, and i cant figure out how to unmix them.
i think this change is too complex, or at least i was not able to make it reasonably work. it might be best to just write a comment explaining what 'w and 's means

[Wuketuke]

nevermind i figured it out