Re: Problems initializing a static reference member variable
Am 03.02.2011 16:16, schrieb tanu:
i have a query
class SS
{
private:
static SS& s_obj;
-------
};
how i initialize s_obj??
You can do that at the point of the definition
of SS::s_obj, e.g. if your header defines
class SS
{
private:
static SS& s_obj;
// ...
};
you need a single translation unit, where the static
data member is defined:
SS& SS::s_obj = ...;
This definition is ok, even though SS::s_obj has private
access. Note that this idiom is sensitive to order of
initialization issues. This can be easily solved by
making SS::s_obj a local variable of static storage
duration instead, e.g.
class SS
{
private:
static SS& get_obj();
// ...
};
and defining the static member function like this:
SS& SS::get_obj() {
static SS& result = ...;
return result;
}
This idiom also allows you to define the static member
function as an inline function in the same place, where
class SS is defined, if you prefer that.
HTH & Greetings from Bremen,
Daniel Kr?gler
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