It was 6, a holdover from FORTRAN because it used (in effect) the FORTRAN linker. That number was just the number that of initial bytes that had to be unique. x12345 and x123456 were the same identifier. Case might be ignored too.
-rob On Sun, Apr 9, 2017 at 1:43 PM, Tom Limoncelli <t...@whatexit.org> wrote: > Did the limit in C used to be 5 characters? That would explain "creat()". > > (That's a bit of trivia I've always wondered about) > > Tom > > > On Wed, Apr 5, 2017 at 9:16 AM, Ian Lance Taylor <i...@golang.org> wrote: > > On Wed, Apr 5, 2017 at 3:57 AM, Jan Mercl <0xj...@gmail.com> wrote: > >> On Wed, Apr 5, 2017 at 12:23 PM <wei.x...@arm.com> wrote: > >> > >>> But i don't find such specification for Golang.Is there any limit on > the > >>> length of an identifier in Golang? > >> > >> The lack of a specified limit implies no limit other than resources > >> available to the compiler and/or the program. > > > > Yes. > > > > Also, that's not precisely what the ISO C standard says. What it says > > is that every C compiler must accept programs that use identifiers > > that do not differ in the first 31 characters. It doesn't say that > > the compiler must treat identifiers whose first 32 characters are the > > same as being the same. In practice modern C compilers also have no > > limit on identifier length. > > > > (Historically the limits on C identifier length have been imposed not > > by compilers but by object file formats. Compilers have historically > > had no limits on identifier length for internal identifiers but when > > generating object files have been forced to limit external identifiers > > to the length permitted by the object file format. Modern object file > > formats (ELF, PE/COFF) have no limits on identifier length, which is a > > requirement for even relatively simple C++ programs.) > > > > Ian > > > > -- > > 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. > > > > -- > Email: t...@whatexit.org Work: tlimonce...@stackoverflow.com > Blog: http://EverythingSysadmin.com > > -- > 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.
