src/test/ui/consts/issue-102117.rs

   1 #![feature(inline_const, const_type_id)]
   2
   3 use std::alloc::Layout;
   4 use std::any::TypeId;
   5 use std::mem::transmute;
   6 use std::ptr::drop_in_place;
   7
   8 pub struct VTable {
   9     layout: Layout,
  10     type_id: TypeId,
  11     drop_in_place: unsafe fn(*mut ()),
  12 }
  13
  14 impl VTable {
  15     pub fn new<T>() -> &'static Self {
  16         const {
  17           //~^ ERROR the parameter type `T` may not live long enough
  18           //~| ERROR the parameter type `T` may not live long enough
  19             &VTable {
  20                 layout: Layout::new::<T>(),
  21                 type_id: TypeId::of::<T>(),
  22                 drop_in_place: unsafe {
  23                     transmute::<unsafe fn(*mut T), unsafe fn(*mut ())>(drop_in_place::<T>)
  24                 },
  25             }
  26         }
  27     }
  28 }
  29
  30 fn main() {}