I have some question about understanding reference collapse, so I do experiments in the following code: template<typename T> void func(T&& t) {} int main() { // There is no referen...

The following link provides the 4 forms of reference collapsing (if I'm correct that these are the only 4 forms): http://thbecker.net/articles/rvalue_references/section_08.html. From the link: A&...

I have the following typedef: using int_ref = int&&; Why does the following code not produce an error (or print false)? std::cout << is_same< int_ref, int_ref&& &...

I just made some research about those (quite) new features and I wonder why C++ Committee decided to introduce the same syntax for both of them? It seems that developers unnecessary have to waste s...

I am trying to understand how std::declval<T>() works. I know how to use it, and know what it does, mainly allows you to use decltype without constructing the object, like decltype(std::decl...

Consider this code: template<typename T> void foo(T&& param){ //In this case && is called universal reference std:string tmp = std::forward<string>(param); } My ques...

changing a type into a reference to a type, allows one to access the members of the type without creating an instance of the type. This seems to be true for both lvalue references and rvalue refere...

I don't know why these code can't be compiled. I'v tested in Visual c++ 2010 and gcc with -std=c++0x. anyone give some suggestion? thanks! template<typename T> class Foo { public: voi...

Possible Duplicate: What are the main purposes of std::forward and which problems does it solve? I know what it does and when to use it but I still can't wrap my head around how it works. ...

By trying to solve this problem, something made me wonder. Consider the following code: template <typename T> struct foo { foo(T const& x) : data(x) {} T data; }; It seems that ...