src/test/ui/derives/issue-91550.rs

   1 use std::collections::HashSet;
   2
   3 /// natural case from the issue
   4 struct Value(u32);
   5
   6 fn main() {
   7     let hs = HashSet::<Value>::new();
   8     hs.insert(Value(0)); //~ ERROR
   9 }
  10
  11 /// synthetic cases
  12 pub struct NoDerives;
  13
  14 struct Object<T>(T);
  15 impl<T: Eq> Object<T> {
  16     fn use_eq(&self) {}
  17 }
  18 impl<T: Ord> Object<T> {
  19     fn use_ord(&self) {}
  20 }
  21 impl<T: Ord + PartialOrd> Object<T> {
  22     fn use_ord_and_partial_ord(&self) {}
  23 }
  24
  25 fn function(foo: Object<NoDerives>) {
  26     foo.use_eq(); //~ ERROR
  27     foo.use_ord(); //~ ERROR
  28     foo.use_ord_and_partial_ord(); //~ ERROR
  29 }