[algs] Add hb_first() and hb_second()
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@ -38,6 +38,8 @@
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template <typename T1, typename T2>
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struct hb_pair_t
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{
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typedef T1 first_t;
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typedef T2 second_t;
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typedef hb_pair_t<T1, T2> pair_t;
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hb_pair_t (const T1& a, const T2& b) : first (a), second (b) {}
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@ -51,6 +53,11 @@ struct hb_pair_t
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template <typename T1, typename T2> static inline hb_pair_t<T1, T2>
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hb_pair (T1 a, T2 b) { return hb_pair_t<T1, T2> (a, b); }
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template <typename Pair> inline typename Pair::first_t
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hb_first (const Pair& pair) { return pair.first; }
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template <typename Pair> inline typename Pair::second_t
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hb_second (const Pair& pair) { return pair.second; }
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/*
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* Bithacks.
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