On this page:
https://pkg.go.dev/flag
There is an example:
var flagvar int func init() { flag.IntVar(&flagvar, "flagname", 1234, "help
message for flagname") }
I understand that this is only an example, but there is no real need to
use an init() function when using the flag package.
When I first read this doc, I thought that using an init() function
was a requirement for the flag package. Other people may share the
same misunderstanding, because 2 years ago I ran into this usage pattern
in a third party library, and ran into problems when trying to compile the
library with a newer Go tool chain.
I mentioned that problem on this list:
https://groups.google.com/g/golang-nuts/c/rkCdS1EQwSM/m/vi44sM8vAwAJ
Would it be ok if I submit a patch to the docs to remove the init()
example from https://pkg.go.dev/flag ?
If people use the flag package from inside an init() function and it works
for them,
that won’t change, since I am not proposing a code change.
Removing init() from the example may reduce confusion for other people
who might have the same confusion that I did.
—
Craig
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