How to use the paste crate for macro tokens

Use the quote! macro from the quote crate to transform proc_macro::TokenStream into a TokenStream that can be manipulated and returned.

use proc_macro::TokenStream;
use quote::quote;

#[proc_macro_derive(HelloMacro)]
pub fn hello_macro_derive(input: TokenStream) -> TokenStream {
    let ast = syn::parse(input).unwrap();
    let name = &ast.ident;
    let generated = quote! {
        impl HelloMacro for #name {
            fn hello_macro() {
                println!("Hello, Macro! My name is {}!", stringify!(#name));
            }
        }
    };
    generated.into()
}

The paste crate isn't the standard way to handle macro tokens; instead, you use the quote crate to build new Rust code from tokens. Think of it like a template engine where you take pieces of code (tokens) and fit them into a pre-written structure to generate a complete function or trait implementation automatically.