23 lines
785 B
Markdown
23 lines
785 B
Markdown
[map.erasure]
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# 23 Containers library [[containers]](./#containers)
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## 23.4 Associative containers [[associative]](associative#map.erasure)
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### 23.4.3 Class template map [[map]](map#erasure)
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#### 23.4.3.5 Erasure [map.erasure]
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[ð](#lib:erase_if,map)
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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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constexpr erase_if(map<Key, T, Compare, Allocator>& c, Predicate pred);
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`
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[1](#1)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/containers.tex#L12183)
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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();
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