从std :: vector获取字节< bool> [英] Get bytes from a std::vector<bool>

问题描述

我有类似以下的东西，并在填充它任意数量的位后，我需要得到的字节写出到一个文件。我没有看到一个办法做到这一点，它似乎有用，所以我必须缺少的东西。任何想法？

I have something like the following, and after populating it with a arbitrary number of bits, I need to get the bytes to write out to a file. I don't see a way to do this and it seems useful, so I must be missing something. Any idea's?

std::vector<bool> a;

a.push_back(true);
a.push_back(false);
a.push_back(false);
a.push_back(true);

a.push_back(false);
a.push_back(true);
a.push_back(true);
a.push_back(false);

推荐答案

std :: vector< ; bool> 实际上不包含bools（iebytes），它包含位！这主要是一个缺点，建议您使用 std :: deque< bool> ，它没有这个功能。

std::vector <bool> does not actually contain bools (i.e.bytes) , it contains bits! This is mostly a missfeature and you are advised to use std::deque <bool>, which doesn't have this "feature" instead.

如果你想让存储是连续的，使用 std :: vector< char> 。

And if you want the storage to be contiguous, use std::vector <char>.

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