What storage duration does member variables have?

[Peter87]

I thought member variables have automatic storage duration because they are automatically destroyed when the parent object is destroyed, but when I search I find nothing and the standard only seem to talk about local function variables.

Do they lack storage duration or do they inherit the storage duration from the parent object?

[JLBorges]

Objects can contain other objects, called subobjects. A subobject can be a member subobject, a base class subobject, or an array element. An object that is not a subobject of any other object is called a complete object.
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The storage duration of member subobjects, base class subobjects and array elements is that of their complete object.

[Peter87]

Ah, I guess I have been thinking about storage duration the wrong way.