1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/os/ossrv/ossrv_pub/boost_apis/boost/cast.hpp Fri Jun 15 03:10:57 2012 +0200
1.3 @@ -0,0 +1,107 @@
1.4 +// boost cast.hpp header file ----------------------------------------------//
1.5 +
1.6 +// (C) Copyright Kevlin Henney and Dave Abrahams 1999.
1.7 +// Distributed under the Boost
1.8 +// Software License, Version 1.0. (See accompanying file
1.9 +// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
1.10 +
1.11 +// See http://www.boost.org/libs/conversion for Documentation.
1.12 +
1.13 +// Revision History
1.14 +// 23 JUn 05 numeric_cast removed and redirected to the new verion (Fernando Cacciola)
1.15 +// 02 Apr 01 Removed BOOST_NO_LIMITS workarounds and included
1.16 +// <boost/limits.hpp> instead (the workaround did not
1.17 +// actually compile when BOOST_NO_LIMITS was defined in
1.18 +// any case, so we loose nothing). (John Maddock)
1.19 +// 21 Jan 01 Undid a bug I introduced yesterday. numeric_cast<> never
1.20 +// worked with stock GCC; trying to get it to do that broke
1.21 +// vc-stlport.
1.22 +// 20 Jan 01 Moved BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS to config.hpp.
1.23 +// Removed unused BOOST_EXPLICIT_TARGET macro. Moved
1.24 +// boost::detail::type to boost/type.hpp. Made it compile with
1.25 +// stock gcc again (Dave Abrahams)
1.26 +// 29 Nov 00 Remove nested namespace cast, cleanup spacing before Formal
1.27 +// Review (Beman Dawes)
1.28 +// 19 Oct 00 Fix numeric_cast for floating-point types (Dave Abrahams)
1.29 +// 15 Jul 00 Suppress numeric_cast warnings for GCC, Borland and MSVC
1.30 +// (Dave Abrahams)
1.31 +// 30 Jun 00 More MSVC6 wordarounds. See comments below. (Dave Abrahams)
1.32 +// 28 Jun 00 Removed implicit_cast<>. See comment below. (Beman Dawes)
1.33 +// 27 Jun 00 More MSVC6 workarounds
1.34 +// 15 Jun 00 Add workarounds for MSVC6
1.35 +// 2 Feb 00 Remove bad_numeric_cast ";" syntax error (Doncho Angelov)
1.36 +// 26 Jan 00 Add missing throw() to bad_numeric_cast::what(0 (Adam Levar)
1.37 +// 29 Dec 99 Change using declarations so usages in other namespaces work
1.38 +// correctly (Dave Abrahams)
1.39 +// 23 Sep 99 Change polymorphic_downcast assert to also detect M.I. errors
1.40 +// as suggested Darin Adler and improved by Valentin Bonnard.
1.41 +// 2 Sep 99 Remove controversial asserts, simplify, rename.
1.42 +// 30 Aug 99 Move to cast.hpp, replace value_cast with numeric_cast,
1.43 +// place in nested namespace.
1.44 +// 3 Aug 99 Initial version
1.45 +
1.46 +#ifndef BOOST_CAST_HPP
1.47 +#define BOOST_CAST_HPP
1.48 +
1.49 +# include <boost/config.hpp>
1.50 +# include <boost/assert.hpp>
1.51 +# include <typeinfo>
1.52 +# include <boost/type.hpp>
1.53 +# include <boost/limits.hpp>
1.54 +# include <boost/detail/select_type.hpp>
1.55 +
1.56 +// It has been demonstrated numerous times that MSVC 6.0 fails silently at link
1.57 +// time if you use a template function which has template parameters that don't
1.58 +// appear in the function's argument list.
1.59 +//
1.60 +// TODO: Add this to config.hpp?
1.61 +# if defined(BOOST_MSVC) && BOOST_MSVC < 1300
1.62 +# define BOOST_EXPLICIT_DEFAULT_TARGET , ::boost::type<Target>* = 0
1.63 +# else
1.64 +# define BOOST_EXPLICIT_DEFAULT_TARGET
1.65 +# endif
1.66 +
1.67 +namespace boost
1.68 +{
1.69 +// See the documentation for descriptions of how to choose between
1.70 +// static_cast<>, dynamic_cast<>, polymorphic_cast<> and polymorphic_downcast<>
1.71 +
1.72 +// polymorphic_cast --------------------------------------------------------//
1.73 +
1.74 + // Runtime checked polymorphic downcasts and crosscasts.
1.75 + // Suggested in The C++ Programming Language, 3rd Ed, Bjarne Stroustrup,
1.76 + // section 15.8 exercise 1, page 425.
1.77 +
1.78 + template <class Target, class Source>
1.79 + inline Target polymorphic_cast(Source* x BOOST_EXPLICIT_DEFAULT_TARGET)
1.80 + {
1.81 + Target tmp = dynamic_cast<Target>(x);
1.82 + if ( tmp == 0 ) throw std::bad_cast();
1.83 + return tmp;
1.84 + }
1.85 +
1.86 +// polymorphic_downcast ----------------------------------------------------//
1.87 +
1.88 + // BOOST_ASSERT() checked polymorphic downcast. Crosscasts prohibited.
1.89 +
1.90 + // WARNING: Because this cast uses BOOST_ASSERT(), it violates
1.91 + // the One Definition Rule if used in multiple translation units
1.92 + // where BOOST_DISABLE_ASSERTS, BOOST_ENABLE_ASSERT_HANDLER
1.93 + // NDEBUG are defined inconsistently.
1.94 +
1.95 + // Contributed by Dave Abrahams
1.96 +
1.97 + template <class Target, class Source>
1.98 + inline Target polymorphic_downcast(Source* x BOOST_EXPLICIT_DEFAULT_TARGET)
1.99 + {
1.100 + BOOST_ASSERT( dynamic_cast<Target>(x) == x ); // detect logic error
1.101 + return static_cast<Target>(x);
1.102 + }
1.103 +
1.104 +# undef BOOST_EXPLICIT_DEFAULT_TARGET
1.105 +
1.106 +} // namespace boost
1.107 +
1.108 +# include <boost/numeric/conversion/cast.hpp>
1.109 +
1.110 +#endif // BOOST_CAST_HPP