Utility

A few useful utility functions.

template <typename T, typename U = T>

T exchange(T& object, const U& new_value)

Copies the new value to object and returns the old value.

Note: This is not an atomic operation.

template <typename T>

typename etl::add_const<T>::type& as_const(T& t)

Returns a value of type T as a const T.

utility.h