using c++17 in mql5

External question — Stack Overflow Stack Exchange Author: H.M Original post: https://stackoverflow.com/questions/72839931 License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/ Adaptation: HTML converted to plain text; contact email addresses removed. Recently I want use all new features of c++(<=c++17) in MQL5 , Or using c++ stl containers , like std::map , std::vector. I can do something like this: creating a wrapper on them and compile them , hence using dll in mql5 But it's so bad idea , Can anyone suggest better way? thx for answer. I know that features like template overloading and more features should be suppoerted by meta trader code base , but they are so slow in this way , I wanna use new features in indirect way now, if it's possible.

External answer — Stack Overflow Stack Exchange Author: TheLegs Original post: https://stackoverflow.com/a/79950469 License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/ Adaptation: HTML converted to plain text; contact email addresses removed. If the goal is to use the functionalities, not the exact same syntax, then MQL5 has two things that might be of interest: Matrices and vectors are available natively , plus There is a Standard Library available, which includes hashmaps and queues. For example: #include <Generic\HashMap.mqh> class RunResults { public: double p[20]; double label[20]; }; CHashMap<uint, RunResults*> runs; template<typename T> double CalculateLoss(const T &p[], const T &label[]) { static vector<T> vp; vp.Assign(p); static vector<T> vl; vl.Assign(label); return vp.Loss(vl, LOSS_MSE); } double GetRunLoss(uint runId) { static RunResults* value; if(runs.TryGetValue(runId, value)) return CalculateLoss(value.p, value.label); else return NULL; } This comment on the MQL5 forum collects some more differences, with the caveat that some of these differences have been resolved in recent years.