Answer by Hasturkun for Recover moved element after failed move...
If using C++17 features is an option, try_emplace will only move the arguments if the key doesn't already exist in the map.Otherwise, you can have your own version to get (functionally) the same...
View ArticleAnswer by ragazzojp for Recover moved element after failed move...
I think what you're trying to do goes against the true meaning of the move semantic.With std::move, you declare you're not going to use that object anymore so C++ compiler can optimize various aspects....
View ArticleAnswer by alex_noname for Recover moved element after failed move...
As workaround on C++11 you could write proxy function insert, which will look for an element before trying to insert it. For unordered_map the search could take at most O(n) but this is the worst case,...
View ArticleRecover moved element after failed move insertion/emplace in std::unordered_map
I fill a std::unordered_map using the insert or emplace methods and the move semantics. When a key clash occurs the element is not inserted in the map but the moved element is erased anyway:#include...
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