epee: avoid ADL selecting C++14 std::quoted

contrib/epee/src/http_auth.cpp

@@ -209,12 +209,7 @@ namespace
   }
 
   template<typename T>
-  using quoted_result = boost::joined_range<
-    const boost::joined_range<const boost::string_ref, const T>, const boost::string_ref
-  >;
-
-  template<typename T>
-  quoted_result<T> quoted(const T& arg)
+  auto quoted_(const T& arg) // avoid ADL selecting C++14 std::quoted
   {
     return boost::range::join(boost::range::join(ceref(u8"\""), arg), ceref(u8"\""));
   }
@@ -242,13 +237,13 @@ namespace
   {
     str.append(u8"Digest ");
     add_first_field(str, u8"algorithm", algorithm);
-    add_field(str, u8"nonce", quoted(user.server.nonce));
-    add_field(str, u8"realm", quoted(user.server.realm));
-    add_field(str, u8"response", quoted(response));
-    add_field(str, u8"uri", quoted(uri));
-    add_field(str, u8"username", quoted(user.credentials.username));
+    add_field(str, u8"nonce", quoted_(user.server.nonce));
+    add_field(str, u8"realm", quoted_(user.server.realm));
+    add_field(str, u8"response", quoted_(response));
+    add_field(str, u8"uri", quoted_(uri));
+    add_field(str, u8"username", quoted_(user.credentials.username));
     if (!user.server.opaque.empty())
-      add_field(str, u8"opaque", quoted(user.server.opaque));
+      add_field(str, u8"opaque", quoted_(user.server.opaque));
   }
 
   //! Implements superseded algorithm specified in RFC 2069
@@ -674,8 +669,8 @@ namespace
           Digest::name, (i == 0 ? boost::string_ref{} : sess_algo)
         );
         add_field(out, u8"algorithm", algorithm);
-        add_field(out, u8"realm", quoted(auth_realm));
-        add_field(out, u8"nonce", quoted(nonce));
+        add_field(out, u8"realm", quoted_(auth_realm));
+        add_field(out, u8"nonce", quoted_(nonce));
         add_field(out, u8"stale", is_stale ? ceref("true") : ceref("false"));
         
         fields.push_back(std::make_pair(std::string(server_auth_field), std::move(out)));