src/test/ui/single-use-lifetime/one-use-in-struct.rs

   1 // Test that we do not warn for named lifetimes in structs,
   2 // even when they are only used once (since to not use a named
   3 // lifetime is illegal!)
   4 //
   5 // check-pass
   6
   7 // Use forbid to verify that `automatically_derived` is handled correctly.
   8 #![forbid(single_use_lifetimes)]
   9 #![allow(dead_code)]
  10 #![allow(unused_variables)]
  11
  12 struct Foo<'f> {
  13     data: &'f u32,
  14 }
  15
  16 enum Bar<'f> {
  17     Data(&'f u32),
  18 }
  19
  20 trait Baz<'f> {}
  21
  22 // `Derive`d impls shouldn't trigger a warning, either (Issue #53738).
  23 #[derive(Debug)]
  24 struct Quux<'a> {
  25     priors: &'a u32,
  26 }
  27
  28 fn main() {}