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flag: Describe the ErrorHandling enum values.

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ContinueOnError is particularly confusing, because it causes
FlagSet.Parse to return as soon as it sees an error. I gather that the
intent is "continue the program" rather than "continue parsing",
compared to exiting or panicking.

Change-Id: I27370ce1f321ea4debcee5b03faff3532495c71a
Reviewed-on: https://go-review.googlesource.com/10740
Reviewed-by: Rob Pike <r@golang.org>
This commit is contained in:
Aaron Jacobs 2015-06-05 10:12:34 +10:00 committed by Rob Pike
parent bbc4351eca
commit 4b6284a7d9
1 changed files with 5 additions and 4 deletions
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9
src/flag/flag.go
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@ -249,13 +249,14 @@ type Getter interface {
Get() interface{}
}
// ErrorHandling defines how to handle flag parsing errors.
// ErrorHandling defines how FlagSet.Parse behaves if the parse fails.
type ErrorHandling int
// These constants cause FlagSet.Parse to behave as described if the parse fails.
const (
ContinueOnError ErrorHandling = iota
ExitOnError
PanicOnError
ContinueOnError ErrorHandling = iota // Return a descriptive error.
ExitOnError // Call os.Exit(2).
PanicOnError // Call panic with a descriptive error.
)
// A FlagSet represents a set of defined flags. The zero value of a FlagSet