CODEWITHSUNDEEP
c++bitsetconstant-expression
Woody1193
Woody1193

Reputation: 7980

Constant Expression Parameters

I have a function that creates a std::bitset, whose length is a constant function parameter. It doesn't work because the constant isn't an "integral constant expression". Is there any way I can make this work?

For reference:

void Foo(const std::string &data, const unsigned int size) {
    std::bitset<size> Bar(data);
    // Do something
    return;
}

Upvotes: 1

Views: 133

Answers (1)

Hawkings
Hawkings

Reputation: 533

The size of a std::bitset needs to be evaulable at compile time. You can either make it big enough (in case you know the maximum size that you may need) or use another alternative, like boost::dynamic_bitset as Igor Tandetnik suggested.

Upvotes: 2

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