isBidirectionalRange

static struct Range
{
    void popFront() @nogc nothrow pure @safe
    {
    }

    void popBack() @nogc nothrow pure @safe
    {
    }

    @property int front() @nogc nothrow pure @safe
    {
        return 0;
    }

    @property int back() @nogc nothrow pure @safe
    {
        return 0;
    }

    bool empty() const @nogc nothrow pure @safe
    {
        return true;
    }

    Range save() @nogc nothrow pure @safe
    {
        return this;
    }
}
static assert(isBidirectionalRange!Range);
static assert(isBidirectionalRange!(int[]));
static assert(!isBidirectionalRange!(void[]));