61 lines
1.1 KiB
Go
61 lines
1.1 KiB
Go
package cli
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import "errors"
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var (
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argsRangeErr = errors.New("index out of range")
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)
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type Args interface {
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// Get returns the nth argument, or else a blank string
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Get(n int) string
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// First returns the first argument, or else a blank string
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First() string
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// Tail returns the rest of the arguments (not the first one)
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// or else an empty string slice
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Tail() []string
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// Len returns the length of the wrapped slice
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Len() int
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// Present checks if there are any arguments present
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Present() bool
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// Slice returns a copy of the internal slice
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Slice() []string
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}
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type args []string
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func (a *args) Get(n int) string {
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if len(*a) > n {
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return (*a)[n]
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}
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return ""
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}
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func (a *args) First() string {
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return a.Get(0)
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}
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func (a *args) Tail() []string {
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if a.Len() >= 2 {
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tail := []string((*a)[1:])
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ret := make([]string, len(tail))
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copy(ret, tail)
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return ret
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}
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return []string{}
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}
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func (a *args) Len() int {
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return len(*a)
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}
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func (a *args) Present() bool {
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return a.Len() != 0
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}
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func (a *args) Slice() []string {
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ret := make([]string, len(*a))
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copy(ret, []string(*a))
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return ret
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}
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