Jason, The Go 1.22 specification, in part,
For statements with range clause A "for" statement with a "range" clause iterates through all entries of an array, slice, string or map, values received on a channel, or integer values from zero to an upper limit [Go 1.22]. For an integer value n, the iteration values 0 through n-1 are produced in increasing order. If n <= 0, the loop does not run any iterations. Peter On Tuesday, February 6, 2024 at 10:34:07 PM UTC-5 peterGo wrote: > Jason, > > The Go Programming Language Specification is reference documentation. It > is intended to be read very carefully in its entirety. > > You are reading a specification dated Version of Aug 2, 2023. The current > specification for Go 1.22 is dated as Modified Tue 06 Feb 2024 10:08:15 PM > EST. > > The specification has always said that len(10) is not somehow defined: > "invalid > argument: 10 (untyped int constant) for len". > > Peter > > On Tuesday, February 6, 2024 at 8:41:38 PM UTC-5 Jason E. Aten wrote: > >> The release notes https://go.dev/doc/go1.22 refer to the spec here >> >> https://go.dev/ref/spec#For_range >> >> but I do not see any details about the new for i := range 10 statement >> there. >> >> This is strange. Have the docs simply not been updated yet? >> >> But I do see this oddly out of place statement, where I'm not sure at all >> what x is referring to in the earlier paragraphs. >> >> "The range expression x is evaluated once before beginning the loop, >> with one exception: if at most one iteration variable is present and >> len(x) is constant <https://go.dev/ref/spec#Length_and_capacity>, the >> range expression is not evaluated." >> >> This would seem to say that, if x is the integer 10, as in the above >> example, and if the len(10) is somehow defined (not sure it would be, but a >> new reader might reasonably assume that an integer has constant length), >> that the range expression would not be evaluated... which seems very odd. >> I'm not sure what this sentence is talking about at all really. >> > -- 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. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/9dc3110b-a6a6-4db5-822c-b891be214982n%40googlegroups.com.
