How ref qualifiers led to deducing this

A follow up on last weeks post on ref qualifiers: How ref qualifiers led to deducing this by Jens Weller From the article: Last week I shared an overview on ref qualifiers with you, this is a follow up on this post. Featuring deducing this, a C++23 feature that should be available in your compiler if its been released in 2025 or later. Lets start with two more things you may want to know about ref qualifiers.