From 9a5022514f0767222e3a3496abceef959f92f1d4 Mon Sep 17 00:00:00 2001
From: Aaron Gyes <me@aaron.gy>
Date: Thu, 14 Mar 2019 16:47:23 -0700
Subject: [PATCH] builtin_argparse: use std::swap

---
 src/builtin_argparse.cpp | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/src/builtin_argparse.cpp b/src/builtin_argparse.cpp
index 4490ae7d2..9c6d930a3 100644
--- a/src/builtin_argparse.cpp
+++ b/src/builtin_argparse.cpp
@@ -105,9 +105,7 @@ static int check_for_mutually_exclusive_flags(const argparse_cmd_opts_t &opts,
                         // We want the flag order to be deterministic. Primarily to make unit
                         // testing easier.
                         if (flag1 > flag2) {
-                            wcstring tmp(flag1);
-                            flag1 = flag2;
-                            flag2 = tmp;
+                            std::swap(flag1, flag2);
                         }
                         streams.err.append_format(
                             _(L"%ls: Mutually exclusive flags '%ls' and `%ls` seen\n"),