`interface{}` return values and `nil`: What explains the behavior of this playground link? #43425

dzrtc · 2020-12-30T01:30:06Z

What version of Go are you using (`go version`)?

$ go version
The Google Playground

Does this issue reproduce with the latest release?

Yes

What operating system and processor architecture are you using (`go env`)?

go env Output

$ go env
The Google Playground

What did you do?

https://play.golang.org/p/rD_TkhU5VvA

What did you expect to see?

I expected reallynil to be true in output lines 2 and 3.

What did you see instead?

reallynil on line 2 is false. What explains this behavior? Is there a link to an explanation in the Go spec?

The text was updated successfully, but these errors were encountered:

dzrtc · 2020-12-30T01:35:32Z

Background: I ran into this issue while trying to implement and work with os.FileInfo which has a Sys() interface{} method.

davecheney · 2020-12-30T01:36:20Z

Thank you for raising this issue. Please consult this entry from the Go faq

https://golang.org/doc/faq#nil_error

Unlike many projects, the Go project does not use GitHub Issues for general discussion or asking questions. GitHub Issues are used for tracking bugs and proposals only.

For asking questions, see:

Stack Overflow with questions tagged "go"
The Go Forum, a web-based forum
Gophers Slack, use the invite app for access. The #general channel is a good starting point.
Go Community on Hashnode with questions and posts tagged with "go"
The golang-nuts mailing list
IRC channel #go-nuts on Freenode

dzrtc · 2020-12-30T01:37:10Z

@davecheney Thanks for the link to FAQ.

davecheney closed this as completed Dec 30, 2020

golang locked and limited conversation to collaborators Dec 30, 2021

gopherbot added the FrozenDueToAge label Dec 30, 2021

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`interface{}` return values and `nil`: What explains the behavior of this playground link? #43425

`interface{}` return values and `nil`: What explains the behavior of this playground link? #43425

dzrtc commented Dec 30, 2020 •

edited

dzrtc commented Dec 30, 2020

davecheney commented Dec 30, 2020

dzrtc commented Dec 30, 2020 •

edited

interface{} return values and nil: What explains the behavior of this playground link? #43425

interface{} return values and nil: What explains the behavior of this playground link? #43425

Comments

dzrtc commented Dec 30, 2020 • edited

What version of Go are you using (go version)?

Does this issue reproduce with the latest release?

What operating system and processor architecture are you using (go env)?

What did you do?

What did you expect to see?

What did you see instead?

dzrtc commented Dec 30, 2020

davecheney commented Dec 30, 2020

dzrtc commented Dec 30, 2020 • edited

`interface{}` return values and `nil`: What explains the behavior of this playground link? #43425

`interface{}` return values and `nil`: What explains the behavior of this playground link? #43425

dzrtc commented Dec 30, 2020 •

edited

What version of Go are you using (`go version`)?

What operating system and processor architecture are you using (`go env`)?

dzrtc commented Dec 30, 2020 •

edited