Aug 13, 2014 · A swap member function can temporarily break invariants if doing so is faster than doing three full moves that have to maintain invariants after each move. If there's an efficient X::swap(X&) …

A swap function is a non-throwing function that swaps two objects of a class, member for member. We might be tempted to use std::swap instead of providing our own, but this would be impossible; …

It's also said that the standard library uses an unqualified call to the swap function in order to call user-defined swap for a user class if such user-defined swap is provided.

Jan 14, 2012 · Is there any built in swap function in C which works without using a third variable?

Apr 2, 2020 · The arguments to std::swap() are two integer pointers, not two addresses of an array with an index. For swapping normal singular int values you will have to use a pointer (call by reference), …

Jul 24, 2012 · The C++11 standard says an object t is swappable with an object u if swap(t, u) and swap(u, t) are valid expressions that select non-member functions called swap from an overload set …

You're not allowed (by the C++ standard) to overload std::swap, however you are specifically allowed to add template specializations for your own types to the std namespace.

Jan 20, 2022 · swap is not a keyword in C++ but rather a function from the C++ standard library. So to use it you need to bring in the function from the appropriate C++ standard library header.

Jun 3, 2011 · I had this same issue, and there are a lot of answers recommending std::swap (like the highest voted one here does) but std::swap does not work (directly) for swapping the contents of two …

Dec 1, 2009 · The swap(int*a, int*b) function has two pointers, holding the address of two integers in memory. So, what it can do is [1] set aside a copy of the first integer, [2] copy the second integer in …