support encoding.Text(Un)Marshaler
diff --git a/dec.go b/dec.go
index 55af236..ea7a486 100644
--- a/dec.go
+++ b/dec.go
@@ -615,3 +615,17 @@
z.SetScale(scale(buf[l : l+scaleSize]))
return nil
}
+
+// MarshalText implements the encoding.TextMarshaler interface.
+func (x *Dec) MarshalText() ([]byte, error) {
+ return []byte(x.String()), nil
+}
+
+// UnmarshalText implements the encoding.TextUnmarshaler interface.
+func (z *Dec) UnmarshalText(data []byte) error {
+ _, ok := z.SetString(string(data))
+ if !ok {
+ return fmt.Errorf("invalid inf.Dec")
+ }
+ return nil
+}
diff --git a/dec_go1_2_test.go b/dec_go1_2_test.go
new file mode 100644
index 0000000..5df0f7b
--- /dev/null
+++ b/dec_go1_2_test.go
@@ -0,0 +1,33 @@
+// +build go1.2
+
+package inf
+
+import (
+ "encoding"
+ "encoding/json"
+ "testing"
+)
+
+var _ encoding.TextMarshaler = new(Dec)
+var _ encoding.TextUnmarshaler = new(Dec)
+
+type Obj struct {
+ Val *Dec
+}
+
+func TestDecJsonMarshalUnmarshal(t *testing.T) {
+ o := Obj{Val: NewDec(123, 2)}
+ js, err := json.Marshal(o)
+ if err != nil {
+ t.Fatalf("json.Marshal(%v): got %v, want ok", o, err)
+ }
+ o2 := &Obj{}
+ err = json.Unmarshal(js, o2)
+ if err != nil {
+ t.Fatalf("json.Unmarshal(%#q): got %v, want ok", js, err)
+ }
+ if o.Val.Scale() != o2.Val.Scale() ||
+ o.Val.UnscaledBig().Cmp(o2.Val.UnscaledBig()) != 0 {
+ t.Fatalf("json.Unmarshal(json.Marshal(%v)): want %v, got %v", o, o, o2)
+ }
+}
