Allow lambdas & std::functions as query factories with C++-98 builds of libodb

1 files changed, 47 insertions, 0 deletions

diff --git a/odb/details/function-wrapper.ixx b/odb/details/function-wrapper.ixx
new file mode 100644
index 0000000..58ede04
--- /dev/null
+++ b/odb/details/function-wrapper.ixx
@@ -0,0 +1,47 @@
+// file      : odb/details/function-wrapper.ixx
+// copyright : Copyright (c) 2009-2014 Code Synthesis Tools CC
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+namespace odb
+{
+  namespace details
+  {
+    template <typename F>
+    inline function_wrapper<F>::
+    ~function_wrapper ()
+    {
+      if (deleter != 0)
+        deleter (std_function);
+    }
+
+    template <typename F>
+    inline function_wrapper<F>::
+    function_wrapper (F* f)
+        : function (f), deleter (0), std_function (0)
+    {
+    }
+
+    template <typename F>
+    inline function_wrapper<F>::
+    function_wrapper (const function_wrapper<F>& x)
+        : function (0), deleter (0), std_function (0)
+    {
+      swap (const_cast<function_wrapper<F>&> (x));
+    }
+
+    template <typename F>
+    inline function_wrapper<F>& function_wrapper<F>::
+    operator= (const function_wrapper<F>& x)
+    {
+      swap (const_cast<function_wrapper<F>&> (x));
+      return *this;
+    }
+
+    template <typename F>
+    inline function_wrapper<F>::
+    operator bool_convertible () const
+    {
+      return function != 0 ? &function_wrapper<F>::true_value : 0;
+    }
+  }
+}