src/test/ui/issues/issue-49934.rs

   1 #![feature(stmt_expr_attributes)]
   2
   3 fn main() {
   4     // fold_stmt (Item)
   5     #[allow(dead_code)]
   6     #[derive(Debug)] // should not warn
   7     struct Foo;
   8
   9     // fold_stmt (Mac)
  10     #[derive(Debug)] //~ ERROR `derive` may only be applied to `struct`s, `enum`s and `union`s
  11     println!("Hello, world!");
  12
  13     // fold_stmt (Semi)
  14     #[derive(Debug)] //~ ERROR `derive` may only be applied to `struct`s, `enum`s and `union`s
  15     "Hello, world!";
  16
  17     // fold_stmt (Local)
  18     #[derive(Debug)] //~ ERROR `derive` may only be applied to `struct`s, `enum`s and `union`s
  19     let _ = "Hello, world!";
  20
  21     // visit_expr
  22     let _ = #[derive(Debug)] "Hello, world!";
  23     //~^ ERROR `derive` may only be applied to `struct`s, `enum`s and `union`s
  24
  25     let _ = [
  26         // filter_map_expr
  27         #[derive(Debug)] //~ ERROR `derive` may only be applied to `struct`s, `enum`s and `union`s
  28         "Hello, world!",
  29     ];
  30 }