From 2234450b81e3451a3e14686e80e13e66cf6d2a4a Mon Sep 17 00:00:00 2001
From: Oleg Morozenkov <m@oleg.rocks>
Date: Thu, 26 Jul 2018 00:03:15 +0300
Subject: Test on old ubuntu

---
 test/utils.h | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

(limited to 'test/utils.h')

diff --git a/test/utils.h b/test/utils.h
index e0db42b..9225b84 100644
--- a/test/utils.h
+++ b/test/utils.h
@@ -98,17 +98,21 @@ inline std::string diffS(const std::string& test, const std::string& expected) {
             v2.push_back(s2);
         }
     } while (r1 || r2);
-    return diff(v1, v2, [](const std::string& item) {
-        return item;
-    });
+
+    std::string (*toStringFunc)(const std::string&) =
+            [](const std::string& item) -> std::string { return item; };
+
+    return diff(v1, v2, toStringFunc);
 }
 
 inline std::string diffMSS(const std::unordered_map<std::string, std::string>& test, const std::unordered_map<std::string, std::string>& expected) {
     std::map<std::string, std::string> v1(test.begin(), test.end());
     std::map<std::string, std::string> v2(expected.begin(), expected.end());
-    return diff(v1, v2, [](const std::pair<const std::string, std::string>& item) {
-        return item.first + '=' + item.second;
-    });
+
+    std::string (*toStringFunc)(const std::pair<const std::string, std::string>&) =
+            [](const std::pair<const std::string, std::string>& item) -> std::string { return item.first + '=' + item.second; };
+
+    return diff(v1, v2, toStringFunc);
 }
 
 #endif //TGBOT_UTILS_H
-- 
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