fixed to handle pointer method (#80)

compiler.go

@@ -462,6 +462,11 @@ func (c *compiler) evalCallExpression(node *ast.CallExpression) (interface{}, er
 			mname = i.Value
 		}
 		rv = rc.MethodByName(mname)
+		if !rv.IsValid() && rc.Type().Kind() != reflect.Ptr {
+			ptr := reflect.New(reflect.TypeOf(c))
+			ptr.Elem().Set(rc)
+			rv = ptr.MethodByName(mname)
+		}
 		if !rv.IsValid() {
 			if rv.Kind() == reflect.Slice {
 				rv = rc.FieldByName(mname)

struct_test.go

@@ -32,6 +32,7 @@ func Test_Render_UnknownAttribute_on_Callee(t *testing.T) {
 
 type Robot struct {
 	Avatar Avatar
+	name   string
 }
 
 type Avatar string
@@ -40,6 +41,10 @@ func (a Avatar) URL() string {
 	return strings.ToUpper(string(a))
 }
 
+func (r *Robot) Name() string {
+	return r.name
+}
+
 func Test_Render_Function_on_sub_Struct(t *testing.T) {
 	r := require.New(t)
 	ctx := NewContext()
@@ -52,3 +57,24 @@ func Test_Render_Function_on_sub_Struct(t *testing.T) {
 	r.NoError(err)
 	r.Equal("BENDER.JPG", s)
 }
+
+func Test_Render_Struct_PointerMethod(t *testing.T) {
+	r := require.New(t)
+	ctx := NewContext()
+	robot := Robot{name: "robot"}
+
+	t.Run("ByValue", func(t *testing.T) {
+		ctx.Set("robot", robot)
+		input := `<%= robot.Name() %>`
+		s, err := Render(input, ctx)
+		r.NoError(err)
+		r.Equal("robot", s)
+	})
+	t.Run("ByPointer", func(t *testing.T) {
+		ctx.Set("robot", &robot)
+		input := `<%= robot.Name() %>`
+		s, err := Render(input, ctx)
+		r.NoError(err)
+		r.Equal("robot", s)
+	})
+}