src/test/ui/mut/mut-suggestion.rs

   1 #[derive(Copy, Clone)]
   2 struct S;
   3
   4 impl S {
   5     fn mutate(&mut self) {
   6     }
   7 }
   8
   9 fn func(arg: S) {
  10     //~^ HELP consider changing this to be mutable
  11     //~| SUGGESTION mut arg
  12     arg.mutate();
  13     //~^ ERROR cannot borrow `arg` as mutable, as it is not declared as mutable
  14 }
  15
  16 fn main() {
  17     let local = S;
  18     //~^ HELP consider changing this to be mutable
  19     //~| SUGGESTION mut local
  20     local.mutate();
  21     //~^ ERROR cannot borrow `local` as mutable, as it is not declared as mutable
  22 }