An array is represent using a struct with a pointer to the array data and the length, like this:struct Array { void* ptr; size_t length; }The struct is passed by value, but since it contains a pointer to the data it will be passed by reference. Note that if you do:void foo (int[] a) { a ~= 3; } auto b = [3, 4]; foo(b); The caller will not see the change made by "foo". Don't know if this explanation helped you to understand.
What does a fixed length array look like when passed, doesn't it have a similar payload of data and length? I take it you mean the struct method is the variable length array.
