[glibmm] gmmproc: _CLASS_OPAQUE_COPYABLE(): Add move operations.

[Murray Cumming <murrayc src gnome org>]

commit 233d4ff7915f2d1ed52651220ec4ecd334f1a8c9
Author: Murray Cumming <murrayc murrayc com>
Date:   Sat Aug 22 12:06:39 2015 +0200

    gmmproc: _CLASS_OPAQUE_COPYABLE(): Add move operations.
    
    The same as in _CLASS_BOXEDTYPE().

 tools/m4/class_opaque_copyable.m4 |   26 ++++++++++++++++++++++++++
 1 files changed, 26 insertions(+), 0 deletions(-)
---
diff --git a/tools/m4/class_opaque_copyable.m4 b/tools/m4/class_opaque_copyable.m4
index f3fe4bd..5873925 100644
--- a/tools/m4/class_opaque_copyable.m4
+++ b/tools/m4/class_opaque_copyable.m4
@@ -133,12 +133,33 @@ __CPPNAME__& __CPPNAME__::operator=(const __CPPNAME__`'& src)
 }
 ')dnl
 
+__CPPNAME__::__CPPNAME__`'(__CPPNAME__&& other) noexcept
+:
+  gobject_(other.gobject_)
+{
+  other.gobject_ = nullptr;
+}
+
+__CPPNAME__& __CPPNAME__::operator=(__CPPNAME__`'&& other) noexcept
+{
+  __CPPNAME__ temp (other);
+  swap(temp);
+  return *this;
+}
+
 __CPPNAME__::~__CPPNAME__`'()
 {
   if(gobject_)
     __OPAQUE_FUNC_FREE`'(gobject_);
 }
 
+void __CPPNAME__::swap(__CPPNAME__& other) noexcept
+{
+  __CNAME__ *const temp = gobject_;
+  gobject_ = other.gobject_;
+  other.gobject_ = temp;
+}
+
 __CNAME__* __CPPNAME__::gobj_copy() const
 {
   return __OPAQUE_FUNC_COPY`'(gobject_);
@@ -180,9 +201,14 @@ ifdef(`__BOOL_CUSTOM_DEFAULT_CTOR__',`dnl
   __CPPNAME__`'(const __CPPNAME__& src);
   __CPPNAME__& operator=(const __CPPNAME__& src);
 
+  __CPPNAME__`'(__CPPNAME__&& other) noexcept;
+  __CPPNAME__& operator=(__CPPNAME__&& other) noexcept;
+
 _IMPORT(SECTION_DTOR_DOCUMENTATION)
   ~__CPPNAME__`'();
 
+  void swap(__CPPNAME__& other) noexcept;
+
   __CNAME__*       gobj()       { return gobject_; }
   const __CNAME__* gobj() const { return gobject_; }