Daniel Murphy: > It's much more likely that phobos will get something like Fixed!128 in > addition to BigInt.
Integer numbers have some proprieties that compilers use with built-in fixed-size numbers to optimize code. I think such optimizations are not performed on library-defined numbers like a Fixed!128 or BigInt. This means there are advantages of having cent/ucent/BigInt as built-ins. Alternatively in theory special annotations are able to tell the compiler that a user-defined type shares some of the characteristics of integer numbers, allowing the compiler to optimize better at compile-time. But I think not even the Scala compiler is so powerful. Bye, bearophile
