Merge pull request #216 from therealmitchconnors/elegant

Implement SliceValue for better list semantics

1 files changed, 42 insertions, 0 deletions

diff --git a/int32_slice.go b/int32_slice.go
index 6ccedcc..ff128ff 100644
--- a/int32_slice.go
+++ b/int32_slice.go
@@ -53,6 +53,48 @@ func (s *int32SliceValue) String() string {
 	return "[" + strings.Join(out, ",") + "]"
 }
 
+func (s *int32SliceValue) fromString(val string) (int32, error) {
+	t64, err := strconv.ParseInt(val, 0, 32)
+	if err != nil {
+		return 0, err
+	}
+	return int32(t64), nil
+}
+
+func (s *int32SliceValue) toString(val int32) string {
+	return fmt.Sprintf("%d", val)
+}
+
+func (s *int32SliceValue) Append(val string) error {
+	i, err := s.fromString(val)
+	if err != nil {
+		return err
+	}
+	*s.value = append(*s.value, i)
+	return nil
+}
+
+func (s *int32SliceValue) Replace(val []string) error {
+	out := make([]int32, len(val))
+	for i, d := range val {
+		var err error
+		out[i], err = s.fromString(d)
+		if err != nil {
+			return err
+		}
+	}
+	*s.value = out
+	return nil
+}
+
+func (s *int32SliceValue) GetSlice() []string {
+	out := make([]string, len(*s.value))
+	for i, d := range *s.value {
+		out[i] = s.toString(d)
+	}
+	return out
+}
+
 func int32SliceConv(val string) (interface{}, error) {
 	val = strings.Trim(val, "[]")
 	// Empty string would cause a slice with one (empty) entry