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Diffstat (limited to 'libodb/odb/tr1/wrapper-traits.hxx')
-rw-r--r-- | libodb/odb/tr1/wrapper-traits.hxx | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/libodb/odb/tr1/wrapper-traits.hxx b/libodb/odb/tr1/wrapper-traits.hxx new file mode 100644 index 0000000..f878ef6 --- /dev/null +++ b/libodb/odb/tr1/wrapper-traits.hxx @@ -0,0 +1,76 @@ +// file : odb/tr1/wrapper-traits.hxx +// license : GNU GPL v2; see accompanying LICENSE file + +#ifndef ODB_TR1_WRAPPER_TRAITS_HXX +#define ODB_TR1_WRAPPER_TRAITS_HXX + +#include <odb/pre.hxx> + +#include <odb/details/config.hxx> // ODB_CXX11 + +// In VC++ std::shared_ptr and std::tr1::shared_ptr is the same class +// template. One is just a using-declaration for the other. +// +#if !(defined(ODB_CXX11) && defined(_MSC_VER)) + +// +// This header assumes that the necessary TR1 header has already +// been included. +// + +#include <odb/wrapper-traits.hxx> + +namespace odb +{ + // Specialization for std::tr1::shared_ptr. + // + template <typename T> + class wrapper_traits< std::tr1::shared_ptr<T> > + { + public: + typedef T wrapped_type; + typedef std::tr1::shared_ptr<T> wrapper_type; + + // T can be const. + // + typedef + typename odb::details::meta::remove_const<T>::result + unrestricted_wrapped_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 unrestricted_wrapped_type& + set_ref (wrapper_type& p) + { + if (!p) + p.reset (new unrestricted_wrapped_type); + + return const_cast<unrestricted_wrapped_type&> (*p); + } + }; +} + +#endif // !(ODB_CXX11 && _MSC_VER) + +#include <odb/post.hxx> + +#endif // ODB_TR1_WRAPPER_TRAITS_HXX |