Utility
A few useful utility functions and classes.
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pair
template <typename T1, typename T2>
struct pair
A clone of std::pair
C++03
template <typename T1, typename T2>
pair<T1, T2> make_pair(T1 a, T2 b)
C++11 and above
template <typename T1, typename T2>
pair<T1, T2> make_pair(T1&& a, T2&& b)
Returns a pair.
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Template deduction guides
C++17 and above
template <typename T1, typename T2>
pair(T1, T2) ->pair<T1, T2>;
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exchange
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.
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add_const
template <typename T>
typename etl::add_const<T>::type& as_const(T& t)
Returns a value of type T as a const T.