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Update include.hh

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Ariel 2024-02-03 00:52:53 +08:00 committed by GitHub
parent 8f645e26ac
commit 71a4b31b53
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1 changed files with 12 additions and 0 deletions
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include.hh
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@ -93,6 +93,18 @@ struct safe_hash {
}
};
struct pair_hash {
template <typename T, typename U>
size_t operator()(const pair<T, U>& a) const {
auto hash1 = safe_hash()(a.first);
auto hash2 = safe_hash()(a.second);
if (hash1 != hash2) {
return hash1 ^ hash2;
}
return hash1;
}
};
/* build data structures */
#define unordered_counter(from, to) __AS_PROCEDURE(unordered_map<__as_typeof(from), size_t, safe_hash> to; for (auto&& x : from) ++to[x];)
#define counter(from, to, cmp) __AS_PROCEDURE(map<__as_typeof(from), size_t, cmp> to; for (auto&& x : from) ++to[x];)