return-value-optimization

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Isn't return value optimization (RVO) a bug?

I maybe asking a dumb question, but I looked开发者_如何学Go at the wikipedia page for RVO here and could not stop wondering if that behavior is wrong. I tried it in my machine and RVO is fully kicked[详细]

2023-01-19 17:49 分类：问答
In C++, is it still bad practice to return a vector from a function?

Short version: It\'s common to return large objects—such as vectors/arrays—in many programming languages. Is this style now acceptable in C++0x if the class has a move constructor, or do C++ program[详细]

2023-01-04 20:18 分类：问答
C++ get method - returning by value or by reference

I\'ve go a very simple question, but unfortunately I can\'t figure the answer myself. Suppose I\'ve got some data structure that holds settings and acts like a settings map.[详细]

2023-01-01 08:01 分类：问答
const reference to temporary and copying - C++

Please consider the following code, struct foo { foo() { std::cout << \"Constructing!\" << std::endl;[详细]

2022-12-22 11:58 分类：问答
Does "Return value optimization" cause undefined behavior?

Reading this Wikipedia article pointed by one of the repliers to the following question: C++ Copy constructor, temporaries and copy semantics[详细]

2022-12-20 21:56 分类：问答
Trusting the Return Value Optimization

How do you go about using the return value optimization? Is there any cases where I can trust a modern compiler to use the optimization, or should I always go the safe way and return a pointer of som[详细]

2022-12-18 04:54 分类：问答
When should RVO kick-in?

From the following code, If RVO has happened, I expect to see the 2 addresses pointing to the same location, however this is not the case (my compiler i开发者_StackOverflow社区s MS VC9.0)[详细]

2022-12-15 23:35 分类：问答