From 308c1fe093a3277ec74a7c0c4bf8934b7e22002b Mon Sep 17 00:00:00 2001
From: Marcin Chrzanowski <marcin.j.chrzanowski@gmail.com>
Date: Wed, 4 Jan 2017 14:05:20 -0500
Subject: Return Graph by const reference

---
 src/brandes.cc | 2 +-
 src/parse.h    | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/brandes.cc b/src/brandes.cc
index 7c7d529..809ccd4 100644
--- a/src/brandes.cc
+++ b/src/brandes.cc
@@ -18,7 +18,7 @@ int main(int argc, char *argv[]) {
 
     Parser parser(input_file);
 
-    Graph graph = parser.get_graph();
+    const Graph &graph = parser.get_graph();
 
     return 0;
 }
diff --git a/src/parse.h b/src/parse.h
index 3f86eec..ec86302 100644
--- a/src/parse.h
+++ b/src/parse.h
@@ -15,7 +15,7 @@ public:
         }
     }
 
-    Graph get_graph() {
+    const Graph & get_graph() {
         return graph_;
     }
 private:
-- 
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