| #ifndef BOOST_SERIALIZATION_STATIC_WARNING_HPP |
| #define BOOST_SERIALIZATION_STATIC_WARNING_HPP |
| |
| // (C) Copyright Robert Ramey 2003. Jonathan Turkanis 2004. |
| // Use, modification and distribution is subject to the Boost Software |
| // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
| // MS compatible compilers support #pragma once |
| #if defined(_MSC_VER) && (_MSC_VER >= 1020) |
| # pragma once |
| #endif |
| |
| // http://www.boost.org/LICENSE_1_0.txt) |
| |
| // See http://www.boost.org/libs/static_assert for documentation. |
| |
| /* |
| Revision history: |
| 15 June 2003 - Initial version. |
| 31 March 2004 - improved diagnostic messages and portability |
| (Jonathan Turkanis) |
| 03 April 2004 - works on VC6 at class and namespace scope |
| - ported to DigitalMars |
| - static warnings disabled by default; when enabled, |
| uses pragmas to enable required compiler warnings |
| on MSVC, Intel, Metrowerks and Borland 5.x. |
| (Jonathan Turkanis) |
| 30 May 2004 - tweaked for msvc 7.1 and gcc 3.3 |
| - static warnings ENabled by default; when enabled, |
| (Robert Ramey) |
| */ |
| |
| #include <boost/config.hpp> |
| |
| // |
| // Implementation |
| // Makes use of the following warnings: |
| // 1. GCC prior to 3.3: division by zero. |
| // 2. BCC 6.0 preview: unreferenced local variable. |
| // 3. DigitalMars: returning address of local automatic variable. |
| // 4. VC6: class previously seen as struct (as in 'boost/mpl/print.hpp') |
| // 5. All others: deletion of pointer to incomplete type. |
| // |
| // The trick is to find code which produces warnings containing the name of |
| // a structure or variable. Details, with same numbering as above: |
| // 1. static_warning_impl<B>::value is zero iff B is false, so diving an int |
| // by this value generates a warning iff B is false. |
| // 2. static_warning_impl<B>::type has a constructor iff B is true, so an |
| // unreferenced variable of this type generates a warning iff B is false. |
| // 3. static_warning_impl<B>::type overloads operator& to return a dynamically |
| // allocated int pointer only is B is true, so returning the address of an |
| // automatic variable of this type generates a warning iff B is fasle. |
| // 4. static_warning_impl<B>::STATIC_WARNING is decalred as a struct iff B is |
| // false. |
| // 5. static_warning_impl<B>::type is incomplete iff B is false, so deleting a |
| // pointer to this type generates a warning iff B is false. |
| // |
| |
| //------------------Enable selected warnings----------------------------------// |
| |
| // Enable the warnings relied on by BOOST_STATIC_WARNING, where possible. The |
| // only pragma which is absolutely necessary here is for Borland 5.x, since |
| // W8073 is disabled by default. If enabling selected warnings is considered |
| // unacceptable, this section can be replaced with: |
| // #if defined(__BORLANDC__) && (__BORLANDC__ <= 0x600) |
| // pragma warn +st |
| // #endif |
| |
| // 6. replaced implementation with one which depends solely on |
| // mpl::print<>. The previous one was found to fail for functions |
| // under recent versions of gcc and intel compilers - Robert Ramey |
| |
| #include <boost/mpl/bool.hpp> |
| #include <boost/mpl/print.hpp> |
| #include <boost/mpl/eval_if.hpp> |
| |
| namespace boost { |
| namespace serialization { |
| |
| template<int L> |
| struct BOOST_SERIALIZATION_STATIC_WARNING_LINE{}; |
| |
| template<bool B, int L> |
| struct static_warning_test{ |
| typename boost::mpl::eval_if_c< |
| B, |
| boost::mpl::true_, |
| typename boost::mpl::identity< |
| boost::mpl::print< |
| BOOST_SERIALIZATION_STATIC_WARNING_LINE<L> |
| > |
| > |
| >::type type; |
| }; |
| |
| template<int i> |
| struct BOOST_SERIALIZATION_SS {}; |
| |
| } // serialization |
| } // boost |
| |
| #define BOOST_SERIALIZATION_BSW(B, L) \ |
| typedef boost::serialization::BOOST_SERIALIZATION_SS< \ |
| sizeof( boost::serialization::static_warning_test< B, L > ) \ |
| > BOOST_JOIN(STATIC_WARNING_LINE, L); |
| |
| #define BOOST_STATIC_WARNING(B) BOOST_SERIALIZATION_BSW(B, __LINE__) |
| |
| #endif // BOOST_SERIALIZATION_STATIC_WARNING_HPP |