src/test/ui/feature-gates/feature-gate-unboxed-closures.rs

   1 #![feature(fn_traits)]
   2
   3 struct Test;
   4
   5 impl FnOnce<(u32, u32)> for Test {
   6 //~^ ERROR the precise format of `Fn`-family traits' type parameters is subject to change
   7 //~| ERROR manual implementations of `FnOnce` are experimental
   8     type Output = u32;
   9
  10     extern "rust-call" fn call_once(self, (a, b): (u32, u32)) -> u32 {
  11         a + b
  12     }
  13     //~^^^ ERROR rust-call ABI is subject to change
  14 }
  15
  16 fn main() {
  17     assert_eq!(Test(1u32, 2u32), 3u32);
  18 }