feat: add decimal custom type (#2112)

scw/custom_types.go

@@ -448,3 +448,15 @@ func EncodeJSONObject(v JSONObject, escape EscapeMode) (string, error) {
 
 	panic(fmt.Sprintf("EncodeJSONObject called with unknown EscapeMode, %v", escape))
 }
+
+// Decimal is a representation of a decimal value, such as 2.5.
+// Comparable to language-native decimal formats, such as Java's BigDecimal or
+// Python's decimal.Decimal.
+// Lookup protobuf google.type.Decimal for details.
+type Decimal string
+
+var _ fmt.Stringer = (*Decimal)(nil)
+
+func (d Decimal) String() string {
+	return string(d)
+}

scw/custom_types_test.go

@@ -829,3 +829,14 @@ func TestJSONObject_MarshalJSON(t *testing.T) {
 		})
 	}
 }
+
+func TestDecimal(t *testing.T) {
+	d := Decimal("1.22")
+	testhelpers.Equals(t, "1.22", d.String())
+
+	dPtr := new(Decimal)
+	testhelpers.Equals(t, "", dPtr.String())
+
+	*dPtr = "1.22"
+	testhelpers.Equals(t, "1.22", dPtr.String())
+}