src/test/ui/closures/2229_closure_analysis/migrations/closure-body-macro-fragment.rs

   1 // run-rustfix
   2 // edition:2018
   3 // check-pass
   4 #![warn(rust_2021_compatibility)]
   5
   6 #[derive(Debug)]
   7 struct Foo(i32);
   8 impl Drop for Foo {
   9     fn drop(&mut self) {
  10         println!("{:?} dropped", self.0);
  11     }
  12 }
  13
  14 macro_rules! m {
  15     (@ $body:expr) => {{
  16         let f = || $body;
  17         //~^ WARNING: drop order
  18         f();
  19     }};
  20     ($body:block) => {{
  21         m!(@ $body);
  22     }};
  23 }
  24
  25 fn main() {
  26     let a = (Foo(0), Foo(1));
  27     m!({
  28         //~^ HELP: add a dummy
  29         let x = a.0;
  30         println!("{:?}", x);
  31     });
  32 }