From a815b90fe870d6d740c91a60ec0633f8bc256337 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Thu, 4 Aug 2011 13:32:25 +0200
Subject: Add support for boost::optional and boost::shared_ptr as value
 wrappers

New test: boost/common/optional.
---
 odb/boost.options                      |  1 +
 odb/boost/optional.options             |  9 +++++
 odb/boost/optional/wrapper-traits.hxx  | 59 +++++++++++++++++++++++++++++++++
 odb/boost/smart-ptr.options            |  5 +++
 odb/boost/smart-ptr/wrapper-traits.hxx | 60 ++++++++++++++++++++++++++++++++++
 5 files changed, 134 insertions(+)
 create mode 100644 odb/boost/optional.options
 create mode 100644 odb/boost/optional/wrapper-traits.hxx
 create mode 100644 odb/boost/smart-ptr/wrapper-traits.hxx

diff --git a/odb/boost.options b/odb/boost.options
index bd77262..09279b5 100644
--- a/odb/boost.options
+++ b/odb/boost.options
@@ -4,5 +4,6 @@
 # license   : GNU GPL v2; see accompanying LICENSE file
 
 --profile boost/smart-ptr
+--profile boost/optional
 --profile boost/unordered
 --profile boost/date-time
diff --git a/odb/boost/optional.options b/odb/boost/optional.options
new file mode 100644
index 0000000..fe99428
--- /dev/null
+++ b/odb/boost/optional.options
@@ -0,0 +1,9 @@
+# file      : odb/boost/optional.options
+# author    : Boris Kolpackov <boris@codesynthesis.com>
+# copyright : Copyright (c) 2009-2011 Code Synthesis Tools CC
+# license   : GNU GPL v2; see accompanying LICENSE file
+
+--profile boost/version
+
+--odb-epilogue '#include <odb/boost/optional/wrapper-traits.hxx>'
+--hxx-prologue '#include <odb/boost/optional/wrapper-traits.hxx>'
diff --git a/odb/boost/optional/wrapper-traits.hxx b/odb/boost/optional/wrapper-traits.hxx
new file mode 100644
index 0000000..04f4b55
--- /dev/null
+++ b/odb/boost/optional/wrapper-traits.hxx
@@ -0,0 +1,59 @@
+// file      : odb/boost/optional/wrapper-traits.hxx
+// author    : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : Copyright (c) 2009-2011 Code Synthesis Tools CC
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+#ifndef ODB_BOOST_OPTIONAL_WRAPPER_TRAITS_HXX
+#define ODB_BOOST_OPTIONAL_WRAPPER_TRAITS_HXX
+
+#include <odb/pre.hxx>
+
+#include <boost/none.hpp>
+#include <boost/optional.hpp>
+
+#include <odb/wrapper-traits.hxx>
+
+namespace odb
+{
+  template <typename T>
+  class wrapper_traits< ::boost::optional<T> >
+  {
+  public:
+    typedef T wrapped_type;
+    typedef ::boost::optional<T> wrapper_type;
+
+    static const bool null_handler = true;
+    static const bool null_default = true;
+
+    static bool
+    get_null (const wrapper_type& o)
+    {
+      return !o;
+    }
+
+    static void
+    set_null (wrapper_type& o)
+    {
+      o = ::boost::none;
+    }
+
+    static const wrapped_type&
+    get_ref (const wrapper_type& o)
+    {
+      return *o;
+    }
+
+    static wrapped_type&
+    set_ref (wrapper_type& o)
+    {
+      if (!o)
+        o = T ();
+
+      return *o;
+    }
+  };
+}
+
+#include <odb/post.hxx>
+
+#endif // ODB_BOOST_OPTIONAL_WRAPPER_TRAITS_HXX
diff --git a/odb/boost/smart-ptr.options b/odb/boost/smart-ptr.options
index 9e4e41b..9efb645 100644
--- a/odb/boost/smart-ptr.options
+++ b/odb/boost/smart-ptr.options
@@ -14,3 +14,8 @@
 #
 --odb-epilogue '#include <odb/boost/smart-ptr/pointer-traits.hxx>'
 --hxx-prologue '#include <odb/boost/smart-ptr/pointer-traits.hxx>'
+
+# Include wrapper traits.
+#
+--odb-epilogue '#include <odb/boost/smart-ptr/wrapper-traits.hxx>'
+--hxx-prologue '#include <odb/boost/smart-ptr/wrapper-traits.hxx>'
diff --git a/odb/boost/smart-ptr/wrapper-traits.hxx b/odb/boost/smart-ptr/wrapper-traits.hxx
new file mode 100644
index 0000000..5389eca
--- /dev/null
+++ b/odb/boost/smart-ptr/wrapper-traits.hxx
@@ -0,0 +1,60 @@
+// file      : odb/boost/smart-ptr/wrapper-traits.hxx
+// author    : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : Copyright (c) 2009-2011 Code Synthesis Tools CC
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+#ifndef ODB_BOOST_SMART_PTR_WRAPPER_TRAITS_HXX
+#define ODB_BOOST_SMART_PTR_WRAPPER_TRAITS_HXX
+
+#include <odb/pre.hxx>
+
+#include <boost/shared_ptr.hpp>
+
+#include <odb/wrapper-traits.hxx>
+
+namespace odb
+{
+  // Specialization for boost::shared_ptr.
+  //
+  template <typename T>
+  class wrapper_traits< ::boost::shared_ptr<T> >
+  {
+  public:
+    typedef T wrapped_type;
+    typedef ::boost::shared_ptr<T> wrapper_type;
+
+    static const bool null_handler = true;
+    static const bool null_default = false;
+
+    static bool
+    get_null (const wrapper_type& p)
+    {
+      return !p;
+    }
+
+    static void
+    set_null (wrapper_type& p)
+    {
+      p.reset ();
+    }
+
+    static const wrapped_type&
+    get_ref (const wrapper_type& p)
+    {
+      return *p;
+    }
+
+    static wrapped_type&
+    set_ref (wrapper_type& p)
+    {
+      if (!p)
+        p.reset (new wrapped_type);
+
+      return *p;
+    }
+  };
+}
+
+#include <odb/post.hxx>
+
+#endif // ODB_BOOST_SMART_PTR_WRAPPER_TRAITS_HXX
-- 
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