"Constexpr" is possibly the most hideous keyword in any programming language. My eyes vomit a little each time I read it.
They could have just used "pure" like in D, but this is C++, so that would be too sane and obvious.
They could have just used "pure" like in D, but this is C++, so that would be too sane and obvious.
It's also why they reuse keywords like `using`.