src/test/ui/issues/issue-31011.rs

   1 macro_rules! log {
   2     ( $ctx:expr, $( $args:expr),* ) => {
   3         if $ctx.trace {
   4         //~^ no field `trace` on type `&T`
   5             println!( $( $args, )* );
   6         }
   7     }
   8 }
   9
  10 // Create a structure.
  11 struct Foo {
  12   trace: bool,
  13 }
  14
  15 // Generic wrapper calls log! with a structure.
  16 fn wrap<T>(context: &T) -> ()
  17 {
  18     log!(context, "entered wrapper");
  19     //~^ in this expansion of log!
  20 }
  21
  22 fn main() {
  23     // Create a structure.
  24     let x = Foo { trace: true };
  25     log!(x, "run started");
  26     // Apply a closure which accesses internal fields.
  27     wrap(&x);
  28     log!(x, "run finished");
  29 }