From 53869fbd424bcb7002a0bc782b17774091fe69ea Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Mon, 9 May 2022 14:28:27 +0200
Subject: [PATCH] Add operator for concatenating strings and string_views

---
 src/libutil/util.hh | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/libutil/util.hh b/src/libutil/util.hh
index de0eb10e9..ea90f60e7 100644
--- a/src/libutil/util.hh
+++ b/src/libutil/util.hh
@@ -706,4 +706,19 @@ template<class... Ts> overloaded(Ts...) -> overloaded<Ts...>;
 std::string showBytes(uint64_t bytes);
 
 
+/* Provide an addition operator between strings and string_views
+   inexplicably omitted from the standard library. */
+inline std::string operator + (const std::string & s1, std::string_view s2)
+{
+    auto s = s1;
+    s.append(s2);
+    return s;
+}
+
+inline std::string operator + (std::string && s, std::string_view s2)
+{
+    s.append(s2);
+    return s;
+}
+
 }