OK.
If you take the
https://play.golang.org/p/L8z2Q_F_fi3
and change the line 18
from
func foo() (err error) {
to
func foo() error {
The code will continue to compile.
But it will stop working (i.e. the error from f.Close will not be returned
by foo).
Unfortunately this is not a contrived example.
The earlier link I posted
https://github.com/blevesearch/bleve/blob/369ad22b9fefdadb42b9367193ef7a73b9e5f4ff/search/searcher/search_regexp.go#L54
is bleve, a search engine with 7.4K stars on Github which is widely used in
production.
The moral of the story is: don't write convoluted code which is hard to
understand,
and which is prone to silent breakages.
On Sunday, 31 January 2021 at 16:51:12 UTC Jan Mercl wrote:
> On Sun, Jan 31, 2021 at 5:24 PM Amnon <[email protected]> wrote:
>
> > https://play.golang.org/p/jnRn4Bv98xS
> >
> > See the example on the Go Playground.
> >
> > Jan, someone can explain to me why it will no longer compile?
>
> That's not an example of what I wrote: "Changing it to an unnamed one
> will cause the program to no longer compile."
>
> Your example is "making the return variable unnamed and declaring a
> new, different variable of the same name in the same scope".
>
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