Stop function parameters from being copied.

[Benjamin Thaut]

If I want to tell the compiler that a certain function argument should not be
copied (say a large struct, or a array) which is the right way to do?

arrays:
1. function foo(in float[] bar) { ... }
2. function foo(ref const(float[]) bar) { ... }
3. something else

structs:
1. function foo(in largestruct bar) { ... }
2. function foo(ref const(largestruct) bar) { ... }
3. something else

Kind Regards
Benjamin Thaut