union cpp
union S
{
std::string str;
std::vector<int> vec;
~S() {} // needs to know which member is active, only possible in union-like class
}; // the whole union occupies max(sizeof(string), sizeof(vector<int>))
union cpp
union S
{
std::string str;
std::vector<int> vec;
~S() {} // needs to know which member is active, only possible in union-like class
}; // the whole union occupies max(sizeof(string), sizeof(vector<int>))
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