难道有升压集合运算的数据类型是比STL更简单呢？ [英] Does boost have a datatype for set operations that is simpler than the STL?

问题描述

我觉得做简单的设置的操作十分笨重使用的C ++ STL方法。例如，要查找两个集合之间的区别是：

I find the C++ STL method of doing simple set operations quite clunky to use. For example, to find the difference between two sets:

std::set<int> newUserIds;
set_difference(currentUserIds.begin(), currentUserIds.end(), mPreviousUserIds.begin(), mPreviousUserIds.end(), std::inserter(newUserIds, newUserIds.end()));
std::set<int> missingUserIds;
set_difference(mPreviousUserIds.begin(), mPreviousUserIds.end(), currentUserIds.begin(), currentUserIds.end(), std::inserter(missingUserIds, missingUserIds.end()));
mPreviousUserIds = currentUserIds;

是否提振可供选择组类，将上面的例子中减少这样的事情：

Does boost offer an alternative set of classes that would reduce the above example to something like this:

set_type<int> newUserIds = currentUserIds.difference(mPreviousUserIds);
set_type<int> missingUserIds = mPreviousUserIds.difference(currentUserIds);

（类似展示Qset Qt中它覆盖运营商 - 以这种方式）

(Similar to QSet in Qt which overrides operator- in this way.)

推荐答案

请参阅Boost范围设定算法的。他们仍然期待一个输出迭代器虽然。

See Boost Range Set algorithms. They still expect an output iterator though.

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