Merge pull request json-iterator#429 from AllenX2018/fix-typo

fix issue json-iterator#326

Author: AllenX2018

extra/naming_strategy.go

@@ -18,6 +18,9 @@ type namingStrategyExtension struct {
 
 func (extension *namingStrategyExtension) UpdateStructDescriptor(structDescriptor *jsoniter.StructDescriptor) {
 for _, binding := range structDescriptor.Fields {
+if unicode.IsLower(rune(binding.Field.Name()[0])) {
+continue
+}
 tag, hastag := binding.Field.Tag().Lookup("json")
 if hastag {
 tagParts := strings.Split(tag, ",")

extra/naming_strategy_test.go

@@ -48,3 +48,17 @@ func Test_set_naming_strategy_with_omitempty(t *testing.T) {
 should.Nil(err)
 should.Equal(`{"user_name":"taowen"}`, string(output))
 }
+
+func Test_set_naming_strategy_with_private_field(t *testing.T) {
+should := require.New(t)
+SetNamingStrategy(LowerCaseWithUnderscores)
+output, err := jsoniter.Marshal(struct {
+UserName string
+userId int
+}{
+UserName: "allen",
+userId: 100,
+})
+should.Nil(err)
+should.Equal(`{"user_name":"allen"}`, string(output))
+}