Horizon Posted August 23 Share Posted August 23 Your attention is invited to the fourth part of an e-book on undefined behavior. This is not a textbook, as it's intended for those who are already familiar with C++ programming. It's a kind of C++ programmer's guide to undefined behavior and to its most secret and exotic corners. The book was written by Dmitry Sviridkin and edited by Andrey Karpov. C++ programmer's guide to undefined behavior: part 4 of 11 by Dmitry Sviridkin From the article: In the C++98, the committee made a terrible decision that seemed reasonable at the time. They created a specialization for std::vector<bool>. Normally, sizeof(bool) == sizeof(char), but one bit is enough for bool. However, 99.99% of all possible platforms can't address memory one bit at a time. Let's pack bits in vector<bool> and store CHAR_BIT (usually 8) boolean values in one byte (char) for more efficient memory utilization. As a result, one needs to work with std::vector<bool> in a very special way... View the full article Quote Link to comment Share on other sites More sharing options...
.png.1e215dcc23b9879f173e6ad9a317b138.png)
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.