tmp/tmp_btmq_p9/{from.md → to.md}
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#### Erasure <a id="map.erasure">[[map.erasure]]</a>
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``` cpp
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template<class Key, class T, class Compare, class Allocator, class Predicate>
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typename map<Key, T, Compare, Allocator>::size_type
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erase_if(map<Key, T, Compare, Allocator>& c, Predicate pred);
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```
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*Effects:* Equivalent to:
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``` cpp
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auto original_size = c.size();
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for (auto i = c.begin(), last = c.end(); i != last; ) {
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if (pred(*i)) {
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i = c.erase(i);
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} else {
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++i;
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}
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}
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return original_size - c.size();
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```
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