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Boost : |
From: Allen (yaozhen_at_[hidden])
Date: 2005-06-21 02:11:50
David Abrahams wrote:
> namespace whatever
> {
> class foo {};
>
> template <class T, int = 0>
Wonderful solution! However, I wonder what the default template argument
here (int = 0) is for?
> struct unique_instance
> {
> T& get()
> {
> static T x;
> return x;
> };
> };
>
> namespace
> {
> foo& bar = unique_instance<foo>::get();
> }
> }
>
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