From d4dc1416daa48c30025eeaa3ab3690a02efdd11e Mon Sep 17 00:00:00 2001
From: Rosen Penev <rosenp@gmail.com>
Date: Sun, 1 Nov 2020 20:49:51 -0800
Subject: [PATCH] cppcheck: make operator const

Signed-off-by: Rosen Penev <rosenp@gmail.com>
---
 include/cxxopts.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/cxxopts.hpp b/include/cxxopts.hpp
index b1fff65..90a2d64 100644
--- a/include/cxxopts.hpp
+++ b/include/cxxopts.hpp
@@ -562,7 +562,7 @@ namespace cxxopts
       {
         template <typename U>
         void
-        operator()(bool, U, const std::string&) {}
+        operator()(bool, U, const std::string&) const {}
       };
 
       template <typename T, typename U>