src/test/ui/mir/mir-inlining/ice-issue-77306-2.rs

   1 // run-pass
   2 // compile-flags:-Zmir-opt-level=3
   3
   4 struct Cursor {}
   5 struct TokenTree {}
   6
   7 impl Iterator for Cursor {
   8     type Item = TokenTree;
   9
  10     fn next(&mut self) -> Option<TokenTree> {
  11         None
  12     }
  13 }
  14
  15 fn tokenstream_probably_equal_for_proc_macro() {
  16     fn break_tokens(_tree: TokenTree) -> impl Iterator<Item = TokenTree> {
  17         let token_trees: Vec<TokenTree> = vec![];
  18         token_trees.into_iter()
  19     }
  20
  21     let c1 = Cursor {};
  22     let c2 = Cursor {};
  23
  24     let mut t1 = c1.flat_map(break_tokens);
  25     let mut t2 = c2.flat_map(break_tokens);
  26
  27     for (_t1, _t2) in t1.by_ref().zip(t2.by_ref()) {}
  28 }
  29
  30 fn main() {
  31     tokenstream_probably_equal_for_proc_macro();
  32 }