type ipValue … func newIPValue(val net.IP, p *net.IP) *ipValue { … } func (i *ipValue) String() string { … } func (i *ipValue) Set(s string) error { … } func (i *ipValue) Type() string { … } func ipConv(sval string) (interface{ … } // GetIP return the net.IP value of a flag with the given name func (f *FlagSet) GetIP(name string) (net.IP, error) { … } // IPVar defines an net.IP flag with specified name, default value, and usage string. // The argument p points to an net.IP variable in which to store the value of the flag. func (f *FlagSet) IPVar(p *net.IP, name string, value net.IP, usage string) { … } // IPVarP is like IPVar, but accepts a shorthand letter that can be used after a single dash. func (f *FlagSet) IPVarP(p *net.IP, name, shorthand string, value net.IP, usage string) { … } // IPVar defines an net.IP flag with specified name, default value, and usage string. // The argument p points to an net.IP variable in which to store the value of the flag. func IPVar(p *net.IP, name string, value net.IP, usage string) { … } // IPVarP is like IPVar, but accepts a shorthand letter that can be used after a single dash. func IPVarP(p *net.IP, name, shorthand string, value net.IP, usage string) { … } // IP defines an net.IP flag with specified name, default value, and usage string. // The return value is the address of an net.IP variable that stores the value of the flag. func (f *FlagSet) IP(name string, value net.IP, usage string) *net.IP { … } // IPP is like IP, but accepts a shorthand letter that can be used after a single dash. func (f *FlagSet) IPP(name, shorthand string, value net.IP, usage string) *net.IP { … } // IP defines an net.IP flag with specified name, default value, and usage string. // The return value is the address of an net.IP variable that stores the value of the flag. func IP(name string, value net.IP, usage string) *net.IP { … } // IPP is like IP, but accepts a shorthand letter that can be used after a single dash. func IPP(name, shorthand string, value net.IP, usage string) *net.IP { … }