extern(C++) opBinary error with getOverloads

[tim-dlang]

extern(C++) struct S
{
    int opBinary(string op)(S rhs) if (op == "+")
    {
        return 0;
    }
    int opBinary(string op)(int rhs) if (op == "+")
    {
        return 0;
    }
    int opBinary(string op)(int rhs) if (op == "-")
    {
        return 0;
    }
}
size_t test()
{
    size_t count;
    static foreach (overload; __traits(getOverloads, S, "opBinary", true))
        static foreach(op; ["+", "-"])
            static if (__traits(compiles, overload!op))
            {
                cast(void)&overload!op;
                pragma(msg, "op=", op, " ", typeof(&overload!op));
                count++;
            }
    return count;
}
static assert(test() == 3);

DMD generates the following error:

testopbinary.d(21): Error: template instance `testopbinarymangle.S.overload!"+"` internal compiler error: C++ `string` template value parameter is not supported
            static if (__traits(compiles, overload!op))
                                          ^

The problem is that DMD uses the name "overload" instead of "opBinary" when checking for operator overloading during mangling of extern(C++).

I will make a PR.