Category : dictionary

I have this code #include <map> #include <tuple> int test(int x, int y){ std::map<std::tuple<int, int>, std::string> test_1; std::tuple<int, int> test2; test2 = make_tuple(x,y); test_1.insert<std::pair<std::tuple<int, int>, std::string>(test2, "string"); return test_1; } Error: ‘return’: cannot convert from ‘std::mapstd::tuple<int,int,std::string,std::lessstd::tuple<int,int>,std::allocator<std::pair<const std::tuple<int,int>,std::string>>>’ to ‘int’ Source: Windows Que..

Read more

This must be a duplicate… if so, help me find, else… help. I am trying to update an entry in a map, where the mapped-type has no default constructor (and possibly no copy constructor). Usually we would do something like this: std::map<K, V> myMap; myMap[k] = V(…); However, for the case that we don’t have ..

Read more

I have a difficult time creating nested maps in C++. First of all I have typedefed my types typedef std::map<std::variant<int, std::string>, std::variant<int, long long int, std::string>> SimpleDict; typedef std::map<std::variant<int, std::string>, std::variant<int, std::string,std::vector<SimpleDict>,SimpleDict>> ComplexDict; Then I define my map: ComplexDict m = { "MAC0", { {"TAG0", "111001011000"}, {"SEQ", "110000100100"}, {"IOD", "0000"} } }; However I get ..

Read more