1package cli
2
3type Args interface {
4	// Get returns the nth argument, or else a blank string
5	Get(n int) string
6	// First returns the first argument, or else a blank string
7	First() string
8	// Tail returns the rest of the arguments (not the first one)
9	// or else an empty string slice
10	Tail() []string
11	// Len returns the length of the wrapped slice
12	Len() int
13	// Present checks if there are any arguments present
14	Present() bool
15	// Slice returns a copy of the internal slice
16	Slice() []string
17}
18
19type args []string
20
21func (a *args) Get(n int) string {
22	if len(*a) > n {
23		return (*a)[n]
24	}
25	return ""
26}
27
28func (a *args) First() string {
29	return a.Get(0)
30}
31
32func (a *args) Tail() []string {
33	if a.Len() >= 2 {
34		tail := []string((*a)[1:])
35		ret := make([]string, len(tail))
36		copy(ret, tail)
37		return ret
38	}
39	return []string{}
40}
41
42func (a *args) Len() int {
43	return len(*a)
44}
45
46func (a *args) Present() bool {
47	return a.Len() != 0
48}
49
50func (a *args) Slice() []string {
51	ret := make([]string, len(*a))
52	copy(ret, *a)
53	return ret
54}
55