I have encountered code which does this:The input argument is an rvalue reference, which normally means the function is intended to take ownership of the argument. That's not quite what is happening here.
When given code of the following structureI've often seen library code use static_cast<Args&&> within the function for argument forwarding. Typically, the justification for this is that using a static_cast avoids an unnecessary template instantiation.
Background and Previous SearchI'm looking for an elegant way to reverse-iterate over a container (e.g. std::vector) using a range-based for-loop in C++14. Searching for a solution I found this Q/A. It basically tells me, that this is not part of the standard library and I have to use boost or...
This question already has an answer here:This program:correctly fails to compile on gcc because:but if you un-comment the template it happily binds and prints "Nonconst right something walk".
I can't do this:If I understand correctly, when initializing an rvalue reference, there's a temporary variable got initialized too. So int &&q = 7; can be considered as:
I can't do this:If I understand correctly, when intializing a rvalue reference, there's a temporary variable got initialized too. So int &&q = 7; can be considered as:
I was hoping stringstream has a constructor that steals its initial content from a string&&. Do such inter-species "move constructors" generally not exist in the STL? If not, why not?
I'm trying to understand the performance implications of using WidgetURef::setName (URef being a Universal Reference, the term coined by Scott Meyers) vs WidgedRRef::setName (RRef being an R-value Reference):