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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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_cost

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