Define bitset size at initialization?

Question

I want to make a bitset in C++. I did a bit of research. All examples I found where like this:

bitset<6> myBitset; // do something with it 

But I don't know the size of the bitset when I define the variable in my class:

#include <bitset> class Test { public:      std::bitset *myBitset; } 

This won't compile...

And initializing like this also doesn't work:

int size = getDependentSizeForBitset(); myBitset = new bitset<size>(); 

Answer 1

Boost has a dynamic_bitset you can use.

Alternatively, you can use a vector<bool>, which (unfortunately) is specialized to act as a bitset. This causes a lot of confusion, and in general is considered a bad idea. But that's how it works, so if that's what you need, you might as well use it, I suppose.

Answer 2

Use Boost::dynamic_bitset