Initialize static std::map with unique_ptr as value

Question

How can one initialize static map, where value is std::unique_ptr?

static void f()
{
    static std::map&         


        

Answer 1

The Problem is that constructing from std::initializer-list copies its contents. (objects in std::initializer_list are inherently const). To solve your problem: You can initialize the map from a separate function...

std::map> init(){
    std::map> mp;
    mp[0] = std::make_unique();
    mp[1] = std::make_unique();
    //...etc
    return mp;
}

And then call it

static void f()
{
    static std::map> mp = init();
}

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