20 General utilities library [utilities]

Preconditions: Each element in *this is swappable with ([swappable.requirements]) the corresponding element in rhs.

Effects: Calls swap for each element in *this and its corresponding element in rhs.

Throws: Nothing unless one of the element-wise swap calls throws an exception.

Remarks: The expression inside noexcept is equivalent to the logical AND of the following expressions: is_nothrow_swappable_v<$T_i$> where $T_i$ is the $i^{\text{th}}$ type in Types.