From 1fe3fe0208608ce843f46d0fceff306e72e6eb0a Mon Sep 17 00:00:00 2001
From: Esteve Fernandez <esteve@osrfoundation.org>
Date: Tue, 5 May 2015 10:32:23 -0700
Subject: [PATCH] Return const reference

---
 rclcpp/include/rclcpp/parameter.hpp | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/rclcpp/include/rclcpp/parameter.hpp b/rclcpp/include/rclcpp/parameter.hpp
index 3da59bb..266eb45 100644
--- a/rclcpp/include/rclcpp/parameter.hpp
+++ b/rclcpp/include/rclcpp/parameter.hpp
@@ -150,7 +150,8 @@ public:
     return value_.bool_value;
   }
   template<ParameterType type>
-  typename std::enable_if<type == ParameterType::PARAMETER_BYTES, std::vector<uint8_t>>::type
+  typename std::enable_if<type == ParameterType::PARAMETER_BYTES,
+  const std::vector<uint8_t> &>::type
   get_value() const
   {
     if (value_.parameter_type != rcl_interfaces::ParameterType::PARAMETER_BYTES) {
@@ -168,7 +169,10 @@ public:
 
   bool as_bool() const {return get_value<ParameterType::PARAMETER_BOOL>(); }
 
-  std::vector<uint8_t> as_bytes() const {return get_value<ParameterType::PARAMETER_BYTES>(); }
+  const std::vector<uint8_t> & as_bytes() const
+  {
+    return get_value<ParameterType::PARAMETER_BYTES>();
+  }
 
 private:
   std::string name_;