src/tools/rustfmt/tests/source/issue-7056.rs

// `r#` opens a raw string only when the run of `#`s ends in a `"`. A raw identifier
// such as `r#struct` must stay classified as normal code, or the macro body rewriter
// copies part of it through verbatim and puts the `$` back in the wrong place.

#![feature(decl_macro)]

macro_rules!  r#struct  {
        ($r#struct:expr)  =>  {  $r#struct  }
}

macro_rules!  old_macro  {
        ($a:expr)  =>  {$a}
}

macro  r#decl_macro($r#fn:expr)  {
        $r#fn
}

macro  passthrough($id:ident)  {
        $id
}

macro_rules!  test_pat_match  {
        (a)  =>  {  6  };
        (r#a)  =>  {  7  };
}

pub  fn  main()  {
        r#println!("{struct}",  r#struct  =  1);
        assert_eq!(2,  r#struct!(2));
        assert_eq!(3,  r#old_macro!(3));
        assert_eq!(4,  decl_macro!(4));

        let  r#match  =  5;
        assert_eq!(5,  passthrough!(r#match));

        assert_eq!("r#struct",  stringify!(r#struct));

        assert_eq!(6,  test_pat_match!(a));
        assert_eq!(7,  test_pat_match!(r#a));
}