Let's say I have the function: void foo(Object& o) { /* only query o, dont alter it*/ } Is it possible to call this function only with already constructed objects and have Visual Studio throw...

#include <set> #include <string> #include <cassert> using namespace std::literals; int main() { auto coll = std::set{ "hello"s }; auto s = "hello"s; coll.insert(std::move(s))...

I want to develop a small polymorphic class with type erasure and I wonder which version of the templatized constructor is better and should be used. We can pass by value: class A { ... templat...

Consider this example: #include <utility> // runtime dominated by argument passing template <class T> void foo(T t) {} int main() { int i(0); foo<int>(i); // fast -- int is s...

I have a class that 'remembers' a reference to some object (e.g. an integer variable). I can't have it reference a value that's destructed immediately, and I'm looking for a way to protect the user...

If I have a class A and functions A f(A &&a) { doSomething(a); return a; } A g(A a) { doSomething(a); return a; } the copy constructor is called when returning a from f, but the move...

I have a code: void f(int&& i) { auto lambda = [](int&& j) { (void)j; } lambda(i); } int main() { f(5); } Clang++ gives an error: no known conversion from 'int' to 'int &...