Is there any analogue for Java Collections.singleton() in C++?

Question

In Java, I can construct a collection of single element by calling:

Collection<String> c = Collections.singleton("foo");

Is there a similar one-liner for std::vector or std::set construction in C++ (in Boost or whatever)?

Answer 1

No, but there is also no need for it. In C++11 you can leverage the compiler's magic support for std::initializer_list<T> (and the new vector constructor that accepts one) by simply writing

vector<string> vec { "foo" };

The same goes for std::set.