ErrFlagTerminator indicates the distinguished token "--", which causes the flag package to treat all subsequent arguments as non-flags.
var ErrFlagTerminator = errors.New("flag terminator")
func ParseOne(fs *flag.FlagSet, args []string) (f *flag.Flag, remainingArgs []string, err error)
ParseOne sees if args[0] is present in the given flag set and if so, sets its value and returns the flag along with the remaining (unused) arguments.
ParseOne always returns either a non-nil Flag or a non-nil error, and always consumes at least one argument (even on error).
Unlike (*flag.FlagSet).Parse, ParseOne does not log its own errors.
A FlagNotDefinedError indicates a flag-like argument that does not correspond to any registered flag in a FlagSet.
type FlagNotDefinedError struct {
RawArg string // the original argument, like --foo or -foo=value
Name string
HasValue bool // is this the -foo=value or --foo=value form?
Value string // only provided if HasValue is true
}
func (e FlagNotDefinedError) Error() string
A NonFlagError indicates an argument that is not a syntactically-valid flag.
type NonFlagError struct {
RawArg string
}
func (e NonFlagError) Error() string