I think OP is talking about multi platform code. Swift isn't "write once compile anywhere" like C or C++. This is also the reason I haven't used it yet, althoug

I think OP is talking about multi platform code. Swift isn't "write once compile anywhere" like C or C++. This is also the reason I haven't used it yet, although I read the swift book and I'm looking forward to multiplatform capabilities (if that were to happen)