Merge remote-tracking branch 'origin/master' into optional-long

1 files changed, 8 insertions, 0 deletions

diff --git a/reflect.go b/reflect.go
index e113583..f1e8e8d 100644
--- a/reflect.go
+++ b/reflect.go
@@ -3,6 +3,8 @@ package arg
 import (
 	"encoding"
 	"reflect"
+	"unicode"
+	"unicode/utf8"
 
 	scalar "github.com/alexflint/go-scalar"
 )
@@ -60,3 +62,9 @@ func isBoolean(t reflect.Type) bool {
 		return false
 	}
 }
+
+// isExported returns true if the struct field name is exported
+func isExported(field string) bool {
+	r, _ := utf8.DecodeRuneInString(field) // returns RuneError for empty string or invalid UTF8
+	return unicode.IsLetter(r) && unicode.IsUpper(r)
+}