cppdraft_translate/cppdraft/unord/set/erasure.md

[unord.set.erasure]

23 Containers library [containers]

23.5 Unordered associative containers [unord]

23.5.6 Class template unordered_set [unord.set]

23.5.6.3 Erasure [unord.set.erasure]

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template<class K, class H, class P, class A, class Predicate> constexpr typename unordered_set<K, H, P, A>::size_type erase_if(unordered_set<K, H, P, A>& c, Predicate pred);

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Effects: Equivalent to:auto original_size = c.size();for (auto i = c.begin(), last = c.end(); i != last; ) {if (pred(*i)) { i = c.erase(i); } else {++i; }}return original_size - c.size();