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rust-clippy/tests/ui-toml/disallowed_macros/auxiliary/proc_macros.rs

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extern crate proc_macro;
use proc_macro::Delimiter::{Brace, Bracket, Parenthesis};
use proc_macro::Spacing::{Alone, Joint};
use proc_macro::{Group, Ident, Punct, Span, TokenStream, TokenTree as TT};
#[proc_macro_derive(Derive)]
pub fn derive(_: TokenStream) -> TokenStream {
TokenStream::from_iter([
TT::from(Punct::new('#', Alone)),
TT::from(Group::new(
Bracket,
TokenStream::from_iter([
TT::from(Ident::new("allow", Span::call_site())),
TT::from(Group::new(
Parenthesis,
TokenStream::from_iter([
TT::from(Ident::new("clippy", Span::call_site())),
TT::from(Punct::new(':', Joint)),
TT::from(Punct::new(':', Alone)),
TT::from(Ident::new("disallowed_macros", Span::call_site())),
]),
)),
]),
)),
TT::from(Ident::new("impl", Span::call_site())),
TT::from(Ident::new("Foo", Span::call_site())),
TT::from(Group::new(Brace, TokenStream::new())),
])
}