I've got -2 with this question in less than 10 minutes.
Does it have something inherently wrong?
TMP and SFINAE are not easy topics, and I'm still learning, so I have searched before asking, but... I couldn't understand the answers I found, so I've asked a new one with a very small example hoping I could get an answer straight to the point.
Any idea how I could improve my question? I'm ready to delete it if it's really so bad or so "a-lot-of-dups".
