Absolutely, go ahead, thank you! I can add more "why" reasoning about "grab" design differences from "catch", but won't get to it until next weekend :(
On Sunday, September 2, 2018 at 6:46:08 PM UTC-5, Liam wrote: > > Well, that was then, this is now... > > I'll just note that 10 of 30 feedback posts on the error handling draft > feedback wiki have asked for named handlers. Can I add your link there? > > > On Sun, Sep 2, 2018, 4:33 PM Vlad Didenko <vl...@didenko.com <javascript:>> > wrote: > >> Some time ago, after going through a very similar design (really, even >> had the catch clause in there), I have arrived at a more generalized >> version of it. That contemplation (still available at >> https://didenko.github.io/grab/grab_worth_it_0.1.1.html ) was very much >> unaccepted here. >> >> Well, I actually do not remember if it was posted here or in golang-dev. >> >> On Wednesday, August 29, 2018 at 5:16:42 PM UTC-5, Liam wrote: >>> >>> Re the Go2 Error Handling proposal >>> >>> https://go.googlesource.com/proposal/+/master/design/go2draft-error-handling.md >>> >>> I have posted this feedback >>> https://gist.github.com/networkimprov/c6cb3e2dff18d31840f2ef22e79d4a1e >>> >>> Which contains an alternate handler concept. Please let me know if you >>> think this merits its own github.com/golang issue. >>> >>> A *flag identifier *indicates errors of various types. This also allows >>> chaining of handlers with the same flag name. There are options for the >>> #flag syntax, e.g. flag!, $flag, @flag, etc. >>> >>> func f() { >>> v, #ret := returnIfError() // #ret can be any type; any non-zero value >>> for it triggers its catch >>> v, #fat := fatalIfError() // #ret, etc are (probably) not local >>> variables >>> v, #wrt := writeOnError() >>> if v != nice { // new scope >>> #fat = MyError{msg:"!nice", ...} >>> catch fat error { debug.PrintStack() } // no return/exit; >>> chained with next catch fat >>> } >>> #packageFlag = anotherError() // invokes package-level handler >>> >>> catch ret error { return ret } // if type is error, type >>> name could be optional >>> catch fat error { log.Fatal(fat) } >>> catch wrt error { con.Write(...); return nil } // return/exit required >>> in last handler on chain >>> } >>> >>> catch packageFlag error { ... } // package-level handler; packageFlag is >>> not a package variable >>> >>> -- >> You received this message because you are subscribed to a topic in the >> Google Groups "golang-nuts" group. >> To unsubscribe from this topic, visit >> https://groups.google.com/d/topic/golang-nuts/tW97ZxsCvdQ/unsubscribe. >> To unsubscribe from this group and all its topics, send an email to >> golang-nuts...@googlegroups.com <javascript:>. >> 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.
