On Dec 17, 2009, at 9:41 AM, Douglas Gregor wrote:
>> Value-initialized != unconstructed. Value-initialized is the formal name
>> for what is done to objects without user-defined default constructor
>> initialized with '()' in new-expressions and initializer lists, as well as
>> objects in an array with initializer of insufficient size. It's also what
>> will happen to objects initialized with the uniform initializer '{}' in
>> C++0x.
>
> Right. You don't get value-initialization (with the zero-fill) for something
> like
>
> void f() {
> X x;
> }
>
> but you would get it for something like:
>
> struct Y {
> X x;
> Y() : x() { }
> };
>
> The motivation for the change to zero-initialize first then call the default
> constructor is that a value-initialized object should be identical to a
> global variable of the same type, as noted here:
Ok, that's still unfortunate, but we'll see if it actually matters in practice.
-Chris
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