std :: bitset :: at（）在VS2015中消失

Question

I used to use bitset::at(x) , the robust runtime checked version to check if any bit from a bitset<> is set. But in VS2015, I am getting this error:

std::bitset<6> bTestFlag;
int b = bTestFlag.at(3); // Error C2039 'at': is not a member of 'std::bitset<6>'

Why did it disappear in VS2015?

Answer 1

You're probably looking for std::bitset::test() . That is the correct member function that checks a bit, but throws std::out_of_range if the provided index isn't a valid position. There was never an at() .