Is static initialization guaranteed?

Question

Take a look at this code:

struct Foo {
        void *ptr;

        constexpr Foo() : ptr(nullptr) { }
};

Foo f;

Is it guaranteed to fbe statically initialized?

Clang uses static initialization here, but MSVC does not .

Answer 1

Yes, the Standard says it fwill initialize by default:

[basic.start.init] / 2:

o , , , constexpr o , [ : - ]. :

• ... [ ]

• , ,

• ... [ , ]

, - ; - . .

- Foo, .

MSVC f.

Answer 2

, . - .

, .

[edit] Clang - - .

Answer 3

I believe this will also be in msvc (at least against 2015) if you have to declare f itself as constexpr Foo f;