From cb3993aef19f82342b7f11225f9ed75b2843dc28 Mon Sep 17 00:00:00 2001
From: Carlos Alexandro Becker <caarlos0@gmail.com>
Date: Mon, 30 Oct 2017 17:26:19 -0200
Subject: [PATCH] fix unexported inner structs

---
 env.go      | 2 +-
 env_test.go | 5 ++---
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/env.go b/env.go
index fa4ddb9..54af9e6 100644
--- a/env.go
+++ b/env.go
@@ -45,7 +45,7 @@ func doParse(ref reflect.Value) error {
 	var errorList []string
 
 	for i := 0; i < refType.NumField(); i++ {
-		if reflect.Ptr == ref.Field(i).Kind() {
+		if reflect.Ptr == ref.Field(i).Kind() && ref.Field(i).CanSet() {
 			err := Parse(ref.Field(i).Interface())
 			if nil != err {
 				return err
diff --git a/env_test.go b/env_test.go
index 29b366e..5dd987b 100644
--- a/env_test.go
+++ b/env_test.go
@@ -31,6 +31,7 @@ type Config struct {
 
 type ParentStruct struct {
 	InnerStruct *InnerStruct
+	unexported  *InnerStruct
 }
 
 type InnerStruct struct {
@@ -77,16 +78,14 @@ func TestParsesEnv(t *testing.T) {
 }
 
 func TestParsesEnvInner(t *testing.T) {
-
 	os.Setenv("innervar", "someinnervalue")
 	defer os.Clearenv()
-	cfg := ParentStruct{&InnerStruct{}}
+	cfg := ParentStruct{&InnerStruct{}, &InnerStruct{}}
 	assert.NoError(t, env.Parse(&cfg))
 	assert.Equal(t, "someinnervalue", cfg.InnerStruct.Inner)
 }
 
 func TestParsesEnvInnerNil(t *testing.T) {
-
 	os.Setenv("innervar", "someinnervalue")
 	defer os.Clearenv()
 	cfg := ParentStruct{}