Question

static const map<const Type*, int>* priority;

where Type is my own special class.

Initialization (why c++ demanded this I have no idea, auto wouldn’t even work)

const map<const Type*, int, less<const Type*>, allocator<pair<const Type* const, int>>>* ToolProperty::priority
= new map<const Type*, int, less<const Type*>, allocator<pair<const Type* const, int>>>();

And finally, trying to use it (where it is telling me that I’m passing in the wrong type)

static void setPriority(const Type* type, int newPriority)
{
    (*priority)[type] = newPriority;
}

Answer 1

priority is a pointer to a const map, but operator[] can’t be used with const associative containers.