tests/ui/const-generics/adt_const_params/const_param_ty_bad.rs

   1 #![allow(incomplete_features)]
   2 #![feature(adt_const_params)]
   3
   4 fn check(_: impl std::marker::ConstParamTy) {}
   5
   6 fn main() {
   7     check(main);               //~ error: `fn() {main}` can't be used as a const parameter type
   8     check(|| {});              //~ error: `{closure@$DIR/const_param_ty_bad.rs:8:11: 8:13}` can't be used as a const parameter type
   9     check(main as fn());       //~ error: `fn()` can't be used as a const parameter type
  10     check(&mut ());            //~ error: `&mut ()` can't be used as a const parameter type
  11     check(&mut () as *mut ()); //~ error: `*mut ()` can't be used as a const parameter type
  12     check(&() as *const ());   //~ error: `*const ()` can't be used as a const parameter type
  13 }