title: Why std::variant in C++17 allows std::variant<int, const int>
body: <p>In <a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2016/p0088r3.html" rel="nofollow noreferrer">http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2016/p0088r3.html</a> there is a note about the need to expand on <code>std::variant&lt;int, const int&gt;</code>, and voting for allowing it, but I can't find the actual rationale.</p>
  
  <p>So why would it make sense to allow for <code>std::variant&lt;int, const int&gt;</code>?</p>