Linked Questions

Say I have this class: class MyClass { public: MyClass(std::string str) : m_str(std::move(str)) {} private: std::string m_str; } In modern C++, will this under any circumstance be less ...

Given this example: #include <string> class Foo { public: Foo(std::string p_member) : m_member{p_member} {} private: std::string m_member; }; int main() { Foo f{"Test"}; ...

Suppose there is a copy--and-move-constructible (and assignable) object, such as std::vector<int>. A class of mine will accept on such object and store it as a member: class A { public: void ...

In C++03, an expression is either an rvalue or an lvalue. In C++11, an expression can be an: rvalue lvalue xvalue glvalue prvalue Two categories have become five categories. What are these new ...

Since we have move semantics in C++, nowadays it is usual to do void set_a(A a) { _a = std::move(a); } The reasoning is that if a is an rvalue, the copy will be elided and there will be just one move....

In Herb Sutter's CppCon 2014 talk Back to Basics: Modern C++ Style he refers on slide 28 (a web copy of the slides are here) to this pattern: class employee { std::string name_; public: void ...

I want to write a template function that receives parameter by move or by copy. The most efficient way that I use is: void setA(A a) { m_a = std::move(a); } Here, when we use is A a; setA(a); ...

I encounter the pass by value and move idiom quite often: struct Test { Test(std::string str_) : str{std::move(str_)} {} std::string str; }; But it seems to me that passing by either const ...

Take the following snippet of code #include <iostream> #include <string> class Foo { private: std::string m_name; public: Foo(std::string name) : m_name { name } {} ...

If you have a function parameter that is intended to be moved into a variable within the function, would you have want to use pass by reference instead of pass by value? For example, is there ever ...

I am working on a project and dealing with shared_ptr's. The program is working and giving the correct output. However upon looking at the logs i notice that at some points in the program the ...

There are many questions and answers about whether to pass arguments by value or by reference. This answer https://stackoverflow.com/a/51706522/2492801 seems to indicate that passing by value and ...

I am trying to write a lambda that receives a temporary object. The lambda will be cached for later execution, and will be executed after the original object was destructed (hence should make a copy ...