I'm using c++17, but I don't get to choose my compiler. Suppose I have type S with move and copy semantics. Typically for me S will be a std::vector ...

I think this is the canonical NRVO example. I'm compiling with -fno-elide-constructors and I see that the following are called: ctor, move ctor, dto ...

The following is an anti-pattern: Using a std::move can even produce worst code (see here) However, what should I do in the following situation: ...

In the program as follows I expected named returned value optimization take place in foo(), so neither copy nor move constructor will be called. An ...

If we write the following function: then NRVO should kick in, so that foo does not get copied on return. Now suppose I want to return two differen ...

I have something like this in my CPP file to initialize an object outside any class. I've simplified it but the point is there is some complex initial ...

I expected to see copy elision from Named Return Value Optimization (NRVO) from this test program but its output is "Addresses do not match!" so NRVO ...

I have a function that is expected to extract a list of key values from a given string, where each key/value pair is represented by a std::pair, the f ...

g++ -Wall z.cpp gives a warning as follows: I know if I change return std::move(s); to return s;, the warning will be avoided. However, according ...

In the cppreference it is said that The copy/move constructors need not be present or accessible in a return statement, when the operand is a prv ...

In many cases, I would like to create a new instance of data and return it to the API caller. I learned that unique_ptr/shared_ptr can be used for f ...

How to enforce RVO in the last 3 operators: #include <iostream> class Noisy { private: int m_value; public: Noisy(int ...

I recently discovered std::optional as a way to improve the clarity of my code, especially for return value of functions. However I had questions abou ...

Why the clang says call to deleted constructor of 'Block<Tuple>::Self' (aka 'Block<Tuple>') in the call of Block<Tuple>::a1() when I ...

Simplified code snippet is: Please also see my live example (which shows different compilers' behavior). In the end, I'm wondering why does auto a ...

I am looking to understand the limitations of NRVO in C++. Would a function with an initial named declaration and a single return be optimised for NRV ...

For example: In accepted answer https://stackoverflow.com/a/14623480/1423254, Does copy elision and RVO would still work for classes without mov ...

I tried finding some info about std::string Named Return Value Optimization (NVRO). I'm not even sure if this is applicable but I'm wondering which wo ...

This question is a slight variant on a related question shown here. In C++17 I have a local variable that I want to be const to demonstrate it is unm ...

I have the following code: (ok, in reality it's much more complicated, but I simplified it to make it easier to understand. so please disregard the th ...