Merge pull request #12 from posener/improves

Enhance program structure and data structures

1 files changed, 39 insertions, 0 deletions

diff --git a/args.go b/args.go
new file mode 100644
index 0000000..86dd41a
--- /dev/null
+++ b/args.go
@@ -0,0 +1,39 @@
+package complete
+
+// Args describes command line arguments
+type Args struct {
+	All           []string
+	Completed     []string
+	Last          string
+	LastCompleted string
+}
+
+func newArgs(line []string) Args {
+	completed := removeLast(line)
+	return Args{
+		All:           line[1:],
+		Completed:     completed,
+		Last:          last(line),
+		LastCompleted: last(completed),
+	}
+}
+
+func (a Args) from(i int) Args {
+	a.All = a.All[i:]
+	a.Completed = a.Completed[i:]
+	return a
+}
+
+func removeLast(a []string) []string {
+	if len(a) > 0 {
+		return a[:len(a)-1]
+	}
+	return a
+}
+
+func last(args []string) (last string) {
+	if len(args) > 0 {
+		last = args[len(args)-1]
+	}
+	return
+}