src/test/ui/trivial-bounds/issue-73021-impossible-inline.rs

   1 // build-pass
   2 // revisions: no-opt inline
   3 // [inline]compile-flags: -Zmir-opt-level=3 --emit=mir
   4 #![feature(trivial_bounds)]
   5 #![allow(unused)]
   6
   7 trait Foo {
   8     fn test(&self);
   9 }
  10
  11 fn foo<'a>(s: &'a mut ())
  12 where
  13     &'a mut (): Foo,
  14 {
  15     s.test();
  16 }
  17
  18 fn clone(it: &mut ()) -> &mut ()
  19 where
  20     for<'any> &'any mut (): Clone,
  21     //~^ WARN trait bound for<'any> &'any mut (): Clone does not depend on any type or lifetime parameters
  22 {
  23     it.clone()
  24 }
  25
  26 fn generic_function<X: Foo>(x: X) {}
  27
  28 struct S where i32: Foo;
  29 //~^ WARN trait bound i32: Foo does not depend on any type or lifetime parameters
  30
  31 impl Foo for () where i32: Foo {
  32 //~^ WARN trait bound i32: Foo does not depend on any type or lifetime parameters
  33     fn test(&self) {
  34         3i32.test();
  35         Foo::test(&4i32);
  36         generic_function(5i32);
  37     }
  38 }
  39
  40 fn f() where i32: Foo {
  41 //~^ WARN trait bound i32: Foo does not depend on any type or lifetime parameters
  42     let s = S;
  43     3i32.test();
  44     Foo::test(&4i32);
  45     generic_function(5i32);
  46 }
  47
  48 fn g() where &'static str: Foo {
  49 //~^ WARN trait bound &'static str: Foo does not depend on any type or lifetime parameters
  50     "Foo".test();
  51     Foo::test(&"Foo");
  52     generic_function("Foo");
  53 }
  54
  55 fn use_op(s: String) -> String
  56 where
  57     String: ::std::ops::Neg<Output = String>,
  58 //~^ WARN trait bound String: Neg does not depend on any type or lifetime parameters
  59 {
  60     -s
  61 }
  62
  63 fn use_for()
  64 where
  65     i32: Iterator,
  66 //~^ WARN trait bound i32: Iterator does not depend on any type or lifetime parameters
  67 {
  68     for _ in 2i32 {}
  69 }
  70
  71 fn main() {}