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ilpropheta/Universal map insert that works with both std::map and std::unordered_map.cpp Secret

Last active July 19, 2016 17:57
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Universal map insert that works with both std::map and std::unordered_map.cpp
template<typename Gen>
ValueType fetch_or_insert(const Key& key, Gen g)
{
const auto er = data.equal_range(key);
if (er.first != er.second)
{
return er.first->second;
}
return data.emplace_hint(er.first, key, g())->second;
}
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