From: Daniel Arndt <arndtd@ornl.gov>
Date: Tue, 9 Apr 2019 17:50:51 +0000 (-0400)
Subject: Use references and clean up a bit
X-Git-Tag: v9.1.0-rc1~208^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0216e3c95260ce37f7a360505ea56cd8434a78db;p=dealii.git

Use references and clean up a bit
---

diff --git a/source/base/subscriptor.cc b/source/base/subscriptor.cc
index 973e5d2e1f..9aa3656845 100644
--- a/source/base/subscriptor.cc
+++ b/source/base/subscriptor.cc
@@ -136,13 +136,9 @@ Subscriptor::subscribe(std::atomic<bool> *const validity,
     object_info = &typeid(*this);
   ++counter;
 
-  const std::string name = (!id.empty()) ? id : unknown_subscriber;
+  const std::string &name = id.empty() ? unknown_subscriber : id;
 
-  map_iterator it = counter_map.find(name);
-  if (it == counter_map.end())
-    counter_map.insert(map_value_type(name, 1U));
-  else
-    it->second++;
+  ++counter_map[name];
 
   *validity = true;
   validity_pointers.push_back(validity);
@@ -154,7 +150,8 @@ void
 Subscriptor::unsubscribe(std::atomic<bool> *const validity,
                          const std::string &      id) const
 {
-  const std::string name = (!id.empty()) ? id : unknown_subscriber;
+  const std::string &name = id.empty() ? unknown_subscriber : id;
+
   if (counter == 0)
     {
       AssertNothrow(counter > 0, ExcNoSubscriber(object_info->name(), name));