C++ Compound literal

Question

In C i can do this:

ppackage ppnull() {
    return (ppackage) {
        .type = NULL
    }
}

However, in C++ I get syntax errors. I use the GNU g++ compiler. Is there a switch to enable this?

This is not standard C++, do `ppackage p = { }; return p;` or just `return { };` if you have C++11. — Seth Carnegie, Feb 24 '12 at 19:09

score 2 · Accepted Answer · answered Feb 24 '12 at 19:08

2

With c++11 you can use initializer list:

struct ppackage
{
    void* type;
};

ppackage ppnull()
{
    return {nullptr};
}

Or just

ppackage ppnull()
{
    return {};
}

answered Feb 24 '12 at 19:08

Lol4t0

Putting `nullptr` in there is unnecessary – Seth Carnegie Feb 24 '12 at 19:11
Now ppackage has an anonymouse union with many structs inside it. There i must have `{.type='f', .fetch={"home"}}` – imacake Feb 24 '12 at 19:19
1

@imacake, well, this doesn't work with unions, you have to change syntax or reconsider your design (use constructors, but it makes your `struct` incompatible with `C`). You should tell, what you can do, than I can provide more complete solution. – Lol4t0 Feb 24 '12 at 19:38

1 Answers1