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c++ Programming Glossary: xvalue

When should std::move be used on a function return value?

http://stackoverflow.com/questions/14856344/when-should-stdmove-be-used-on-a-function-return-value

is unnecessary because the newly created Foo will be an xvalue. But what in cases like these struct Foo Foo meh Foo foo do..

What is the value category of the operands of C++ operators when unspecified?

http://stackoverflow.com/questions/14991219/what-is-the-value-category-of-the-operands-of-c-operators-when-unspecified

expressions into three disjoint value categories lvalues xvalues and prvalues § 3.10 1 . An explanation of what value categories.. of the fundamental classifications in this taxonomy lvalue xvalue or prvalue. This property of an expression is called its value..

What is an example of a difference in allowed usage or behavior between an xvalue and a prvalue FOR NON-POD objects?

http://stackoverflow.com/questions/15482508/what-is-an-example-of-a-difference-in-allowed-usage-or-behavior-between-an-xvalu

of a difference in allowed usage or behavior between an xvalue and a prvalue FOR NON POD objects What are rvalues lvalues.. a prvalue FOR NON POD objects What are rvalues lvalues xvalues glvalues and prvalues gives a good overview of the taxonomy.. prvalues are like the old style rvalues whereas the new xvalues allow for lvalue like behavior. However consider the following..

What are rvalues, lvalues, xvalues, glvalues, and prvalues?

http://stackoverflow.com/questions/3601602/what-are-rvalues-lvalues-xvalues-glvalues-and-prvalues

are rvalues lvalues xvalues glvalues and prvalues In C 03 an expression is either an rvalue.. an lvalue . In C 11 an expression can be an rvalue lvalue xvalue glvalue prvalue Two categories have become five categories... whose return type is an lvalue reference is an lvalue. An xvalue an œeXpiring value also refers to an object usually near the..

Is pass-by-value a reasonable default in C++11?

http://stackoverflow.com/questions/7592630/is-pass-by-value-a-reasonable-default-in-c11

move from prvalue foo std move lval potential move from xvalue and only minimal work is done. You'd need two overloads to do..

Why is template argument deduction disabled with std::forward?

http://stackoverflow.com/questions/7779900/why-is-template-argument-deduction-disabled-with-stdforward

reference from the expression std move u which is an xvalue. In the context of a perfect forwarding function like f sometimes..