Linked Questions

I don't understand when I should use std::move and when I should let the compiler optimize... for example: using SerialBuffer = vector< unsigned char >; // let compiler optimize it ...

Tonight I've been taking a look at some code I've been working on over the last few days, and began reading up on move semantics, specifically std::move. I have a few questions to ask you pros to ...

Possible Duplicate: C++11 rvalues and move semantics confusion What I think is correct is std::string GetLine() { std::string str; std::getline(std::cin, str); return std::move(str); } ...

I have a very basic question: is it a good idea to return a std::vector<A> using std::move? For, example: class A {}; std::vector<A> && func() { std::vector<A> v; /* ...

I have a function struct foo { std::vector<int> v; }; foo func(); will the vector inside foo be moved or copied when returning from the function?

I have TTempTable class with move symantics. I wrote TTempTable&& MyFunction() { TTempTable tmp = f(...); ... return std::move(tmp); } and got no compiler errors. Was this correct?

I'm confused as to what is going on in the following code snippet. Is move really necessary here? What would be the most optimal + safe way of returning the temporary set? set<string> getWords()...

I came across the following code snippet std::string&& test() { std::string m="Hello"; return (std::move(m)); } int main() { std::string&& m = test(); } I understand the ...

which is right? std::string get_string() { std::string result; // ... more operations. return std::move(result); } Or std::string&& get_string() { std::string ...

I am trying to come to terms with r-value references. I discovered that string's operator+ is always declared to return by value. Why is operator+ defined to return by value: basic_string operator+(...

How can I trust the compiler for non-guaranteed copy elision (in case of return value optimization) in this example code: struct X { X() : size(10000), very_large_buffer(new char[size]) { } ...

I am wondering about this because of scope issues. For example, consider the code typedef struct { int x1;/*top*/ int x2;/*bottom*/ int id; } subline_t; subline_t subline(int x1, int x2, ...

I have a very basic question in C++. How to avoid copy when returning an object ? Here is an example : std::vector<unsigned int> test(const unsigned int n) { std::vector<unsigned int>...

Is RVO (Return Value Optimization) guaranteed or applicable for all objects and situations in C++ compilers (specially GCC)? If answer is "no", what are the conditions of this optimization for a ...

As far as I understand one of the purposes of adding move semantics is to optimize code by calling special constructor for copying "temporary" objects. For example, in this answer we see that it can ...