Most of this is explained in blog.golang.org/constants. -rob
On Thu, Dec 6, 2018 at 4:04 AM Andy Balholm <andybalh...@gmail.com> wrote: > When an untyped integer constant is converted to a typed value, it always > becomes int. I suppose the rules could be made more complicated to handle > values that won’t fit in an int. But what if the value is too big to fit in > a uint64? Should it be a float64 then? > > Andy > > On Dec 5, 2018, at 8:54 AM, Michel Levieux <m.levi...@capitaldata.fr> > wrote: > > Well the only thing I do in the main is : > > fmt.Println(v) >> > > Shouldn't the compiler statically type v to uint64? > I don't get the need to force type of v to uint64? > > Le mer. 5 déc. 2018 à 17:45, Andy Balholm <andybalh...@gmail.com> a > écrit : > >> Apparently in your code the value is being assigned to an int. But it’s >> too large for an int; it needs a uint64 to hold it. >> >> Andy >> >> On Dec 5, 2018, at 8:35 AM, Michel Levieux <m.levi...@capitaldata.fr> >> wrote: >> >> Hi guys, >> >> With a colleague of mine, we've run into a strange issue today. When we >> look at package math, in const.go, we can see this line : >> >> MaxUint64 = 1<<64 - 1 >>> >>> >> which I assume works pretty well. But if I do the same in a test main and >> try to 'go run' it, with this line : >> >> const v = 1 << 64 - 1 >>> >>> >> I get the following error : >> >> ./testmain.go:8:13: constant 18446744073709551615 overflows int >>> >> >> I think this is not a bug and we're just missing something here. Could >> anyone explain this behaviour / point me to a documentation that explains >> it? >> >> Thank you guys >> >> -- >> You received this message because you are subscribed to the Google Groups >> "golang-nuts" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to golang-nuts+unsubscr...@googlegroups.com. >> For more options, visit https://groups.google.com/d/optout. >> >> >> > -- > You received this message because you are subscribed to the Google Groups > "golang-nuts" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to golang-nuts+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
