From d3b0b73118dcc7a814ec73f67210cf4164bebb8b Mon Sep 17 00:00:00 2001
From: Dominik Steinberger <ZeeD26@users.noreply.github.com>
Date: Wed, 30 Sep 2020 14:57:16 +0200
Subject: [PATCH] Print input when  validation fails (#516)

Co-authored-by: Dominik Steinberger <open-source-libraries@steinberger.io>
---
 include/CLI/Validators.hpp | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/include/CLI/Validators.hpp b/include/CLI/Validators.hpp
index bc916f86..4d90896a 100644
--- a/include/CLI/Validators.hpp
+++ b/include/CLI/Validators.hpp
@@ -746,9 +746,7 @@ class IsMember : public Validator {
             }
 
             // If you reach this point, the result was not found
-            std::string out(" not in ");
-            out += detail::generate_set(detail::smart_deref(set));
-            return out;
+            return input + " not in " + detail::generate_set(detail::smart_deref(set));
         };
     }