src/test/ui/macros/macro-in-expression-context.rs

   1 // run-rustfix
   2
   3 macro_rules! foo {
   4     () => {
   5         assert_eq!("A", "A");
   6         //~^ WARN trailing semicolon in macro
   7         //~| WARN this was previously
   8         //~| NOTE macro invocations at the end of a block
   9         //~| NOTE to ignore the value produced by the macro
  10         //~| NOTE for more information
  11         //~| NOTE `#[warn(semicolon_in_expressions_from_macros)]` on by default
  12         assert_eq!("B", "B");
  13     }
  14     //~^^ ERROR macro expansion ignores token `assert_eq` and any following
  15     //~| NOTE the usage of `foo!` is likely invalid in expression context
  16 }
  17
  18 fn main() {
  19     foo!()
  20     //~^ NOTE caused by the macro expansion here
  21     //~| NOTE in this expansion
  22     //~| NOTE in this expansion
  23     //~| NOTE in this expansion
  24     //~| NOTE in this expansion
  25     //~| NOTE in this expansion
  26     //~| NOTE in this expansion
  27 }