Constructor requirements in C++11 for POD

Question

Possible Duplicate:
What are Aggregates and PODs and how/why are they special?

What kind of constructors can structs in C++11 have to keep this struct as POD?

Only initializer-list acceptable? Or maybe there are no any restrictions?

score 1 · Answer 1 · answered Sep 01 '12 at 14:51

1

You need a defaulted default constructor so that it is trivial:

struct pot
{
    constexpr pot() noexcept = default;

    pot(int a, float b) : x(a), y(b) { }

    int x;
    float y;
};

The constexpr and noexcept are optional, but we might as well.

Usage:

pot p;         // OK
pot q(1, 1.5); // also OK

answered Sep 01 '12 at 14:51

Kerrek SB

Why are you use constexpr for constructor here? – FrozenHeart Sep 01 '12 at 15:08
1

@NikitaTrophimov: You might as well offer the strongest possible guarantees, non? That way you can use the type in constant expressions. – Kerrek SB Sep 01 '12 at 15:27

1 Answers1