Initializing a union with a non-trivial constructor

Question

I have a structure which I create a custom constructor to initialize the members to 0\'s. I\'ve seen in older compilers that when in release mode, without doing a memset to

Answer 1

As mentioned in Greg Rogers' comment to unwesen's post, you can give your union a constructor (and destructor if you wish):

struct foo
{
    int a;
    int b;
};

union bar
{
    bar() { memset(this, 0, sizeof(*this)); }

    int a;
    foo f;
};