Background I’ve thought I was good at C++, however, after my friend asking me about rvalue, I realized that I knew nothing about the strength of C++.
In this article, I won’t introduce either rvalue or move constructor. Instead, I will describe and dig into his question and try to explain what benefits the move constructor provides.
Question For std::map<Key, T, Compare, Allocator>::insert, there are two overloadings:
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