[libsigc++2] signal_base, trackable: Make move operations noexcept.

[Murray Cumming <murrayc src gnome org>]

commit cef07d89849d3f978e6cd73a7a3b7977a032d146
Author: Murray Cumming <murrayc murrayc com>
Date:   Tue Sep 1 16:30:10 2015 +0200

    signal_base, trackable: Make move operations noexcept.

 sigc++/signal_base.cc |    4 ++--
 sigc++/signal_base.h  |    4 ++--
 sigc++/trackable.cc   |    4 ++--
 sigc++/trackable.h    |    4 ++--
 4 files changed, 8 insertions(+), 8 deletions(-)
---
diff --git a/sigc++/signal_base.cc b/sigc++/signal_base.cc
index 20074ec..1504f62 100644
--- a/sigc++/signal_base.cc
+++ b/sigc++/signal_base.cc
@@ -167,7 +167,7 @@ signal_base::signal_base(const signal_base& src)
   impl_->reference();
 }
 
-signal_base::signal_base(signal_base&& src)
+signal_base::signal_base(signal_base&& src) noexcept
 : trackable(std::move(src)),
   impl_(std::move(src.impl_))
 {
@@ -248,7 +248,7 @@ signal_base& signal_base::operator=(const signal_base& src)
   return *this;
 }
 
-signal_base& signal_base::operator=(signal_base&& src)
+signal_base& signal_base::operator=(signal_base&& src) noexcept
 {
   trackable::operator=(std::move(src));
   impl_ = std::move(src.impl_);
diff --git a/sigc++/signal_base.h b/sigc++/signal_base.h
index 5b3d668..d80fd2d 100644
--- a/sigc++/signal_base.h
+++ b/sigc++/signal_base.h
@@ -284,13 +284,13 @@ struct SIGC_API signal_base : public trackable
 
   signal_base(const signal_base& src);
 
-  signal_base(signal_base&& src);
+  signal_base(signal_base&& src) noexcept;
 
   ~signal_base();
 
   signal_base& operator=(const signal_base& src);
 
-  signal_base& operator=(signal_base&& src);
+  signal_base& operator=(signal_base&& src) noexcept;
 
   /** Returns whether the list of slots is empty.
    * @return @p true if the list of slots is empty.
diff --git a/sigc++/trackable.cc b/sigc++/trackable.cc
index 16f68b5..8d634d0 100644
--- a/sigc++/trackable.cc
+++ b/sigc++/trackable.cc
@@ -38,7 +38,7 @@ trackable::trackable(const trackable& /*src*/)
 : callback_list_(nullptr)
 {}
 
-trackable::trackable(trackable&& src)
+trackable::trackable(trackable&& src) noexcept
 : callback_list_(std::move(src.callback_list_))
 {
   src.callback_list_ = nullptr;
@@ -52,7 +52,7 @@ trackable& trackable::operator=(const trackable& src)
   return *this;
 }
 
-trackable& trackable::operator=(trackable&& src)
+trackable& trackable::operator=(trackable&& src) noexcept
 {
   if(this != &src)
     notify_callbacks(); //Make sure that we have finished with existing stuff before replacing it.
diff --git a/sigc++/trackable.h b/sigc++/trackable.h
index 894d688..606adfd 100644
--- a/sigc++/trackable.h
+++ b/sigc++/trackable.h
@@ -115,11 +115,11 @@ struct SIGC_API trackable
 
   trackable(const trackable& src);
 
-  trackable(trackable&& src);
+  trackable(trackable&& src) noexcept;
 
   trackable& operator=(const trackable& src);
 
-  trackable& operator=(trackable&& src);
+  trackable& operator=(trackable&& src) noexcept;
 
   ~trackable();