I am writing a template library that is supposed to mirror std::map's interface. I stumbled across a question when implementing the following insert() ...
I am writing a template library that is supposed to mirror std::map's interface. I stumbled across a question when implementing the following insert() ...
A named rvalue reference in an lvalue, but it is an lvalue which can only bind to an rvalue, so: Ok so then why is it that I can assign after bindi ...
Usage I have two classes, which give me a counter in range based for loops (bit like a simple ranges v3 lib). // Usage with l-values std::initialize ...
I am trying to figure out the meaning of the following snippet: I know a is an lvalue expression of type "rvalue reference to int", and b is a gene ...
I think my understanding of rvalue references and move semantics has some holes in it. As far as I've rvalue references understood now, I could imple ...
Consider this code: void test(auto& arg){} int main(){ test("bla"); test(1); } The call test(1); gives an error, because 1 is an rvalu ...
I use C++ https://cppinsights.io/ to see the progress of instantiation, and there's something puzzled between Function&& and Function. I comm ...
Suppose I have a "builder" class B which builds a class C, and looks somewhat like the following: This is all nice and good ... until I think about ...
I have a simple linked list node class which I can use to create a list 1->2->3 like so: I want to make this construction less verbose by add ...
If we want to initialize an reference with an different type, we need to make it const (const type*) so that an temporary can be generated implicit an ...
I'm curious about that is there any practical difference between using std::move to convert an l-value integer to r-value, and adding a 0 to that inte ...
The main method below launches two std::asyncs. The future f in the main method is initially used to hold the future for the first async before being ...
I have a function to judge whether some value is an enum, and I test it by But the result is When I change it into: It works Now I just ...
I know that inline functions get copied into the code each time they are referenced. From my current understanding, I think it would be ok to return t ...
I am new to c++. For this code is_lvalue(fun()) return true. And This I understand, as lvalue reference are afterall lvalues. But for code, is_l ...
I am interested in how the following code: keeps the variable 'c' in memory? How the compiler implements the reference at the machine level? Does ...
I'm sure this has been asked before, but my googling skills weren't sufficient to find my case. Simply put, is the following valid C++ code? Normal ...
This is a follow-up question of my previous question. Consider the following toy code: #include <iostream> using namespace std; class X { publ ...
The following code snippet fails to compile on the latest version of MSVC (Visual Studio 2022 17.2.2). The same snippet seemed to work just fine on pr ...
Trying to understand std::move, I found this answer to another question. Say I have this function What I think I understand: arg is an lvalue ...