src/test/ui/regions/regions-close-over-type-parameter-1.rs

   1 // Test for what happens when a type parameter `A` is closed over into
   2 // an object. This should yield errors unless `A` (and the object)
   3 // both have suitable bounds.
   4
   5 // revisions: base nll
   6 // ignore-compare-mode-nll
   7 //[nll] compile-flags: -Z borrowck=mir
   8
   9 trait SomeTrait {
  10     fn get(&self) -> isize;
  11 }
  12
  13
  14 fn make_object1<A: SomeTrait>(v: A) -> Box<dyn SomeTrait + 'static> {
  15     Box::new(v) as Box<dyn SomeTrait + 'static>
  16     //~^ ERROR the parameter type `A` may not live long enough
  17 }
  18
  19 fn make_object2<'a, A: SomeTrait + 'a>(v: A) -> Box<dyn SomeTrait + 'a> {
  20     Box::new(v) as Box<dyn SomeTrait + 'a>
  21 }
  22
  23 fn make_object3<'a, 'b, A: SomeTrait + 'a>(v: A) -> Box<dyn SomeTrait + 'b> {
  24     Box::new(v) as Box<dyn SomeTrait + 'b>
  25     //~^ ERROR the parameter type `A` may not live long enough
  26 }
  27
  28 fn main() {}