The class template owner_less allows ownership-based mixed comparisons of shared and weak pointers.
namespace std {
template<class T> struct owner_less;
template<class T> struct owner_less<shared_ptr<T> > {
typedef bool result_type;
typedef shared_ptr<T> first_argument_type;
typedef shared_ptr<T> second_argument_type;
bool operator()(shared_ptr<T> const&, shared_ptr<T> const&) const;
bool operator()(shared_ptr<T> const&, weak_ptr<T> const&) const;
bool operator()(weak_ptr<T> const&, shared_ptr<T> const&) const;
};
template<class T> struct owner_less<weak_ptr<T> > {
typedef bool result_type;
typedef weak_ptr<T> first_argument_type;
typedef weak_ptr<T> second_argument_type;
bool operator()(weak_ptr<T> const&, weak_ptr<T> const&) const;
bool operator()(shared_ptr<T> const&, weak_ptr<T> const&) const;
bool operator()(weak_ptr<T> const&, shared_ptr<T> const&) const;
};
}
operator()(x,y) shall return x.owner_before(y). [ Note: Note that
operator() defines a strict weak ordering as defined in [alg.sorting];
under the equivalence relation defined by operator(), !operator()(a, b) && !operator()(b, a), two shared_ptr or weak_ptr instances are equivalent if and only if they share ownership or are both empty.
— end note ]
RetroSearch is an open source project built by @garambo | Open a GitHub Issue
Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo
HTML:
3.2
| Encoding:
UTF-8
| Version:
0.7.4