From 6f460a33db65d64ae60a4f5cac46de8f1e152ca5 Mon Sep 17 00:00:00 2001
From: Jay <jay@trj.tw>
Date: Sun, 13 Dec 2020 22:56:38 +0800
Subject: [PATCH] [fix] dup empty name check ignore

---
 argparse.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/argparse.go b/argparse.go
index 37a5da1..b1f2509 100644
--- a/argparse.go
+++ b/argparse.go
@@ -39,7 +39,7 @@ func New() *Parser {
 
 func (p *Parser) addArg(a *arg) error {
 	for _, v := range p.args {
-		if v.sname == a.sname || v.lname == a.lname {
+		if (a.sname != "" && v.sname == a.sname) || (a.lname != "" && v.lname == a.lname) {
 			return errors.New("option name dup")
 		}
 	}