use quote::quote; // 1.0.2
use proc_macro2::{Ident, Span}; // 1.0.3

fn main() {
    let foo = vec![Ident::new("app", Span::call_site()), Ident::new("name", Span::call_site())];

    println!("{}", quote! { prepared_s.query(&[#(&self.#foo),*])});
}