Hi list, I was looking at the NSDecimal.swift to learn a bit about the implementation of the Decimal type. I get that a lot of the API in this type exists for compatibility reasons with the C implementation.
But I was wondering about how the NSDecimalCopy function differs from a simple assignment of one Decimal value to another. NSDecimalCopy simply assigns each field of the struct one by one, so when would it ever be preferable to performing a simple assignment? So basically my question is - is there any difference in the result of performing: var a: Decimal = 1 var b: Decimal = 2 NSDecimalCopy(&b, &a) and var a: Decimal = 1 var b: Decimal = 2 b = a Secondly - if there is no difference in the result - is it not more performant to assign the value directly? This question also raised a question about Swift internals: If you have a pure value type (no nested reference types): Does an assignment then simply copy a chunk of memory with the size of the struct? Or is each field assigned/copied recursively? Sincerely, /morten _______________________________________________ swift-corelibs-dev mailing list swift-corelibs-dev@swift.org https://lists.swift.org/mailman/listinfo/swift-corelibs-dev
