May be indent(1) can be taught about Go syntax rules so that it can
"pretty-print" ala Lisp?
> On Jul 3, 2019, at 3:25 PM, Michael Jones <michael.jo...@gmail.com> wrote:
>
> Any form of restraining gofmt has my vote. One that I despise is ruining:
>
> switch v {
> case ‘a’: doA = true
> case ‘b’: doB = true
> :
> case ‘z’: doZ = true
> }
>
> Just had this two days ago. So sad to see it balloon up
>
> On Wed, Jul 3, 2019 at 11:36 AM Aston Motes <ast...@gmail.com> wrote:
> This proposal is not very much different from a one-liner
>
> if err != nil { <single_statement> }
>
> It's just 10 more characters. Granted, gofmt won't leave the one-liner
> formatted that way, but it's not much more typing and comes with the benefit
> of not needing a new keyword.
>
> One variation on this proposal that is a little weird is that if could in the
> case of checking for an error omit the requirement that its argument be a
> boolean, giving
>
> if err { <single_statement> }
>
> Which is only 3 characters longer than on and again avoids a new keyword. I
> believe changing the behavior of if this way should be backwards compatible.
>
> On Wed, Jul 3, 2019 at 6:26 AM Michael Ellis <michael.f.el...@gmail.com>
> wrote:
> I like this. A lot.
>
> It's clean and explicit. The reader only needs to understand that 'on' is a
> test for a nil value (vs 'if' which tests for boolean true).
>
>
>
> On Tuesday, July 2, 2019 at 3:57:24 PM UTC-4, Liam wrote:
> This proposal has attracted modest attention from the Go team...
> https://github.com/golang/go/issues/32611
>
> It suggests:
>
> err := f()
> on err, <single_statement>
>
>
> on err, return err // any type can be tested for non-zero
> on err, return fmt.Errorf(...)
>
> on err, fmt.Println(err) // doesn't stop the function
> on err, continue // retry in a loop
>
> on err, goto label // labeled handler invocation
> on err, hname // named handler invocation
>
>
>
> And offers these possible extensions:
>
> on err, os.IsNotExist(err): <stmt>
> on err, err == io.EOF: <stmt>
> on err, err.(*os.PathError): <stmt> // doesn't panic if not a match
>
> on err, <condition>: <stmt>
> on err: <stmt> // this pair provides if/else in 2 lines
>
>
> on err := f(), <stmt> // for assignment with single lvalue
>
>
> Other punctuation is possible, e.g. on (err) <stmt>
>
> Now if we could just convince the Go gods to prototype this along with try()
> in 1.14 :-)
>
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> Michael T. Jones
> michael.jo...@gmail.com
>
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