insert an array element in an std::map

Question

I don't understand why this code works:

std::map<int,char> map2;
map2.insert (std::pair<int,char>(3,'a'));

But this doesn't:

std::map<int,double[2]> map1;
map1.insert (std::pair<int,double[2]>(100,{0,0}));

Do you get the same problem if you just try to create a `std::pair` _without_ inserting it into a map? In other words, is the problem really the insertion, or the construction? — Tim Randall, Sep 05 '18 at 19:39

score 0 · Accepted Answer · answered Sep 05 '18 at 19:50

Where the last answer explains it as arrays are not assignable or copy constructible, therefore cannot be mapped to.

As an alternative, you can use pointer arrays or vectors.

1 Answers1