From 44a5cfc3d3b8a6eef64ece3480623b864c0fcc35 Mon Sep 17 00:00:00 2001
From: Diego Ferigo <diego.ferigo@iit.it>
Date: Mon, 7 May 2018 11:04:35 +0200
Subject: [PATCH] ParameterMetadata::operator== should be const

---
 toolbox/include/base/Parameter.h | 4 ++--
 toolbox/src/base/Parameter.cpp   | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/toolbox/include/base/Parameter.h b/toolbox/include/base/Parameter.h
index a5be2c525..600d66692 100644
--- a/toolbox/include/base/Parameter.h
+++ b/toolbox/include/base/Parameter.h
@@ -82,8 +82,8 @@ class wbt::ParameterMetadata
 
     ParameterMetadata& operator=(const ParameterMetadata& paramMD);
     ParameterMetadata& operator=(ParameterMetadata&& paramMD);
-    bool operator==(const ParameterMetadata& rhs);
-    inline bool operator!=(const ParameterMetadata& rhs) { return !(*this == rhs); }
+    bool operator==(const ParameterMetadata& rhs) const;
+    inline bool operator!=(const ParameterMetadata& rhs) const { return !(*this == rhs); }
 };
 
 /**
diff --git a/toolbox/src/base/Parameter.cpp b/toolbox/src/base/Parameter.cpp
index c01780ba8..44ef4a5cb 100644
--- a/toolbox/src/base/Parameter.cpp
+++ b/toolbox/src/base/Parameter.cpp
@@ -53,7 +53,7 @@ ParameterMetadata& ParameterMetadata::operator=(ParameterMetadata&& other)
     return *this;
 }
 
-bool ParameterMetadata::operator==(const ParameterMetadata& rhs)
+bool ParameterMetadata::operator==(const ParameterMetadata& rhs) const
 {
     bool ok = true;
     ok = ok && (this->index == rhs.index);