...int len = r.walkLength;
    return r.cycle.drop(n >= 0 ? n : len + n).take(len...

...Foo[]()

{

return (cast(Foo*)(*this._data).arr)[len..len + 1u];

}

()[0u] Foo with immutable members...

...len = aa->b_length;
        if (len == 4)
            i = (size_t)key & 3;
        else if (len...

...Array(T) { T* ptr; private size_t len; ... }
    This code will only be visible to...

...max);
	int len = cast(int)s.length;
	for (int i=0; i < len-1; i...

...128
    if (len > LIBIDMAX)
    {
        // Attempt to compress the name
        name2 = id_compress(name, len);
 // snip...

...u)
{
    immutable len = arr.length;
    arr.ptr[len] = u;
    arr = arr[0 .. len + 1];
}
//----
void...

...nothrow @safe int __builtin_va_arg_pack_len();
        extern pure nothrow @safe ulong __builtin_object...

...it packs 2 pointers (pair: ptr, ptr+len), modeling the region in between.
No matter...

...override size_t write (size_t len)
        {
                return len;
        }
}
~~~

Compile and link those two files...