src/test/ui/regions/regions-free-region-ordering-caller.rs

   1 // Test various ways to construct a pointer with a longer lifetime
   2 // than the thing it points at and ensure that they result in
   3 // errors. See also regions-free-region-ordering-callee.rs
   4
   5 // revisions: migrate nll
   6 //[nll]compile-flags: -Z borrowck=mir
   7
   8 struct Paramd<'a> { x: &'a usize }
   9
  10 fn call2<'a, 'b>(a: &'a usize, b: &'b usize) {
  11     let z: Option<&'b &'a usize> = None;//[migrate]~ ERROR E0491
  12     //[nll]~^ ERROR lifetime may not live long enough
  13 }
  14
  15 fn call3<'a, 'b>(a: &'a usize, b: &'b usize) {
  16     let y: Paramd<'a> = Paramd { x: a };
  17     let z: Option<&'b Paramd<'a>> = None;//[migrate]~ ERROR E0491
  18     //[nll]~^ ERROR lifetime may not live long enough
  19 }
  20
  21 fn call4<'a, 'b>(a: &'a usize, b: &'b usize) {
  22     let z: Option<&'a &'b usize> = None;//[migrate]~ ERROR E0491
  23     //[nll]~^ ERROR lifetime may not live long enough
  24 }
  25
  26 fn main() {}