From e6ac1444084ec384a4da354fee0573a3f048c99a Mon Sep 17 00:00:00 2001
From: Karsten Knese <Karsten1987@users.noreply.github.com>
Date: Thu, 20 Jun 2019 10:43:44 -0700
Subject: [PATCH] use default parameter descriptor in parameters interface
 (#765)

* use default parameter descriptor in parameters interface

Signed-off-by: Karsten Knese <karsten@openrobotics.org>

* use default parameter for value

Signed-off-by: Karsten Knese <karsten@openrobotics.org>
---
 .../rclcpp/node_interfaces/node_parameters_interface.hpp     | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/rclcpp/include/rclcpp/node_interfaces/node_parameters_interface.hpp b/rclcpp/include/rclcpp/node_interfaces/node_parameters_interface.hpp
index 16ff2afc8c..deb2be2306 100644
--- a/rclcpp/include/rclcpp/node_interfaces/node_parameters_interface.hpp
+++ b/rclcpp/include/rclcpp/node_interfaces/node_parameters_interface.hpp
@@ -51,8 +51,9 @@ class NodeParametersInterface
   const rclcpp::ParameterValue &
   declare_parameter(
     const std::string & name,
-    const rclcpp::ParameterValue & default_value,
-    const rcl_interfaces::msg::ParameterDescriptor & parameter_descriptor) = 0;
+    const rclcpp::ParameterValue & default_value = rclcpp::ParameterValue(),
+    const rcl_interfaces::msg::ParameterDescriptor & parameter_descriptor =
+    rcl_interfaces::msg::ParameterDescriptor()) = 0;
 
   /// Undeclare a parameter.
   /**