QxOrm  1.2.6
C++ Object Relational Mapping library
is_boost_weak_ptr.h
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00031 
00032 #ifndef _QX_IS_BOOST_WEAK_PTR_H_
00033 #define _QX_IS_BOOST_WEAK_PTR_H_
00034 
00035 #ifdef _MSC_VER
00036 #pragma once
00037 #endif
00038 
00046 #include <boost/weak_ptr.hpp>
00047 #include <boost/mpl/if.hpp>
00048 #include <boost/mpl/logical.hpp>
00049 
00050 namespace qx {
00051 namespace trait {
00052 
00057 template <typename T>
00058 class is_boost_weak_ptr
00059 {
00060 
00061 private:
00062 
00063    template <typename V> static char isSmartPtr(boost::weak_ptr<V>);
00064    static int isSmartPtr(...);
00065    static T t;
00066 
00067 public:
00068 
00069    enum { value = (sizeof(qx::trait::is_boost_weak_ptr<T>::isSmartPtr(t)) == sizeof(char)) };
00070 
00071    typedef typename boost::mpl::if_c<qx::trait::is_boost_weak_ptr<T>::value, 
00072                                      boost::mpl::true_, 
00073                                      boost::mpl::false_>::type type;
00074 
00075 };
00076 
00077 } // namespace trait
00078 } // namespace qx
00079 
00080 #endif // _QX_IS_BOOST_WEAK_PTR_H_