1 files changed, 38 insertions, 0 deletions
diff --git a/args.go b/args.go
new file mode 100644
index 0000000..bb45d1c
--- /dev/null
+++ b/args.go
@@ -0,0 +1,38 @@
+package complete
+
+type args struct {
+	all           []string
+	completed     []string
+	beingTyped    string
+	lastCompleted string
+}
+
+func newArgs(line []string) args {
+	completed := removeLast(line)
+	return args{
+		all:           line[1:],
+		completed:     completed,
+		beingTyped:    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
+}