[Bug rust/108111] Rust meets clang

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108111

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Marc Poulhiès from comment #1)
> I'll need to read a bit more about the 8 (default move assignment op being
> deleted).

Lexer has this member:

  buffered_queue<int, InputSource &> input_queue;

That has a member of type InputSource& which means it is not assignable, so
Lexer is not assignable either.

Are you sure you want a reference there?

Using std::reference_wrapper<InputSource> would work without needing to change
buffered_queue.