Question

E.g., if you have a sorted array of the struct:

struct Item
{
    int val;
    string property;
}

How would you go about using these with assumeSorted so that you could then search on Item.val?

All the examples of ranges I can find online use arrays of integers.

Answer 1

You need to define a comparison operator: http://dlang.org/operatoroverloading.html#compare

struct Item
{
    int val;
    string property;

    int opCmp(ref const Item other) const
    {
        return val - other.val;
    }
}

After the comparison operator is defined, all sorting-related functions should work just like with integers.