Prefix validation error with argument name #105
Merged
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Currently, it is not possible for a custom validation function to know the name of the argument. This prefixes it with the argument name like the built-in validation functions.
The issue I'm trying to solve is that I've built a validation function that I use for multiple options, like this:
You can work around this with a unique lambda for each option, but that's kind of frustating, so I figured I'd suggest this change.
The other option I considered was adding a new type of validation function with a signature like
func(name string, args []string) error
but that would confuse the API or break it.P.S.: Thanks for this great library!