On Thu, 28 May 2020 at 22:07, Pete Dietl <petedi...@gmail.com> wrote:
> Upon taking a look at gnulib, I found that they have arithmetic wrap > functions which guarantee wrapping. > We can use these functions to guarantee that overflow will just wrap > around. > > Let's leave the shift operators out for now. > > comp is for complement. ~ > > In most scheme implementations, providing only one operand to the > arithmetic functions > just returns that argument, aside from subtraction, which negates the > argument. > > Once again I am aiming for the single argument syntax of $(math ...) > > Interestingly, in Guile, (+) and (*) return 1, but (/) and (-) return > errors about invalid number of arguments. > Personally, I think no operands should result in an error. > I think that would save people from horrible bugs that would otherwise be hidden, so yes. Integer maths is important at the language level - it will enable algorithms that weren't possible before e.g. dividing a list into equal halves or a for-loop for which we also need a function that generates a range). To me this seems to be on a higher level of importance compared to bit manipulation. Tim
