On Thursday, March 8, 2018 at 12:36:19 PM UTC-5, Ian Lance Taylor wrote: > > On Thu, Mar 8, 2018 at 9:13 AM, <di...@veryhaha.com <javascript:>> > wrote: > > > > On Thursday, March 8, 2018 at 11:49:18 AM UTC-5, Ian Lance Taylor wrote: > >> > >> On Thu, Mar 8, 2018 at 8:43 AM, <di...@veryhaha.com> wrote: > >> > > >> > There are two semicolon rules in Go spec: > >> > https://golang.org/ref/spec#Semicolons > >> > The first one states how a semicolon will be automatically inserted, > >> > however, the second one states how a semicolon can be omitted. > >> > Isn't more consistent to modify the second one to the following > >> > description? > >> > > >> > To allow complex statements to occupy a single line, a semicolon may > be > >> > inserted before a closing ")" or "}". > >> > >> We would have to change a lot of the syntax productions. For example > >> > >> StructType = "struct" "{" { FieldDecl ";" } "}" . > >> > >> The rule as stated permits omitting the final ";" when the "}" follows > >> on the same line (if the "}" is on a different line, the ";" is > >> inserted automatically anyhow). If we change to your version, we need > >> to rewrite the StructType production to not have a trailing ";", and > >> then rely on the new rule to permit adding one. > >> > > > > Ok, get it. > > > > But how about just change the second rule to the following instead. > > > > To allow complex statements to occupy a single line, a semicolon may be > > optional before a closing ")" or "}". > > Compilers will insert it back if it is absent. > > I guess I'm not sure why that is any clearer than the current rule. >
The benefit of the new one is it is easier to explain the rules for new gophers. With the modified version, we can explain the rules as: Many semicolons in Go are optional, compilers will insert back the absent semicolons for us automatically. The insertion rules are 1) ..... 2) ..... > 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.
