On: Swift 1.2 and Xcode 6.3 beta

[loqi]

C++98 (maybe earlier) has a similar feature:

    if (mytype* p = find_or_null(blah))
        foo(*p);

Still have to dereference p, but at least it's only in scope when doing so is safe. Also goes well with auto and std::optional:

    if (auto opt = find_or_none(blah))
        foo(*opt);