[llvm] SmallVector: add missing constexpr annotations (NFC) (PR #98296)

[Nikita Popov via llvm-commits]

nikic wrote:

> I've gone through https://en.cppreference.com/w/cpp/language/constexpr, and there doesn't seem to be a relationship between constexpr functions and constexpr constructors, but maybe I'm missing something?

How would you ever call a non-static constexpr member in a constexpr context if you cannot obtain an object of the class in a constexpr context, because the constructor is not constexpr?

These things are nominally independent, but non-static constexpr members are useless without constexpr ctors.

https://github.com/llvm/llvm-project/pull/98296