Suppose I have two items, a and b, that compare the same. So a < b is false, and b < a is false. If these items are inserted into a std::multiset (or std::multimap) as keys, do I have any guarantees of their final sorted order?Suppose I have two items, a and b, that compare
阅读背景：
在C ++中，std :: multiset是否保持稳定的排序顺序？
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