diff -r e1b950c65cb4 -r 837f303aceeb epoc32/include/stdapis/boost/cast.hpp --- a/epoc32/include/stdapis/boost/cast.hpp Wed Mar 31 12:27:01 2010 +0100 +++ b/epoc32/include/stdapis/boost/cast.hpp Wed Mar 31 12:33:34 2010 +0100 @@ -1,51 +1,107 @@ -// © Copyright Fernando Luis Cacciola Carballal 2000-2004 -// Use, modification, and distribution is subject to the Boost Software -// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at -// http://www.boost.org/LICENSE_1_0.txt) +// boost cast.hpp header file ----------------------------------------------// -// See library home page at http://www.boost.org/libs/numeric/conversion +// (C) Copyright Kevlin Henney and Dave Abrahams 1999. +// Distributed under the Boost +// Software License, Version 1.0. (See accompanying file +// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) + +// See http://www.boost.org/libs/conversion for Documentation. + +// Revision History +// 23 JUn 05 numeric_cast removed and redirected to the new verion (Fernando Cacciola) +// 02 Apr 01 Removed BOOST_NO_LIMITS workarounds and included +// instead (the workaround did not +// actually compile when BOOST_NO_LIMITS was defined in +// any case, so we loose nothing). (John Maddock) +// 21 Jan 01 Undid a bug I introduced yesterday. numeric_cast<> never +// worked with stock GCC; trying to get it to do that broke +// vc-stlport. +// 20 Jan 01 Moved BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS to config.hpp. +// Removed unused BOOST_EXPLICIT_TARGET macro. Moved +// boost::detail::type to boost/type.hpp. Made it compile with +// stock gcc again (Dave Abrahams) +// 29 Nov 00 Remove nested namespace cast, cleanup spacing before Formal +// Review (Beman Dawes) +// 19 Oct 00 Fix numeric_cast for floating-point types (Dave Abrahams) +// 15 Jul 00 Suppress numeric_cast warnings for GCC, Borland and MSVC +// (Dave Abrahams) +// 30 Jun 00 More MSVC6 wordarounds. See comments below. (Dave Abrahams) +// 28 Jun 00 Removed implicit_cast<>. See comment below. (Beman Dawes) +// 27 Jun 00 More MSVC6 workarounds +// 15 Jun 00 Add workarounds for MSVC6 +// 2 Feb 00 Remove bad_numeric_cast ";" syntax error (Doncho Angelov) +// 26 Jan 00 Add missing throw() to bad_numeric_cast::what(0 (Adam Levar) +// 29 Dec 99 Change using declarations so usages in other namespaces work +// correctly (Dave Abrahams) +// 23 Sep 99 Change polymorphic_downcast assert to also detect M.I. errors +// as suggested Darin Adler and improved by Valentin Bonnard. +// 2 Sep 99 Remove controversial asserts, simplify, rename. +// 30 Aug 99 Move to cast.hpp, replace value_cast with numeric_cast, +// place in nested namespace. +// 3 Aug 99 Initial version + +#ifndef BOOST_CAST_HPP +#define BOOST_CAST_HPP + +# include +# include +# include +# include +# include +# include + +// It has been demonstrated numerous times that MSVC 6.0 fails silently at link +// time if you use a template function which has template parameters that don't +// appear in the function's argument list. // -// Contact the author at: fernando_cacciola@hotmail.com -// -// -// Revision History -// -// 19 Nov 2001 Syntatic changes as suggested by Darin Adler (Fernando Cacciola) -// 08 Nov 2001 Fixes to accommodate MSVC (Fernando Cacciola) -// 04 Nov 2001 Fixes to accommodate gcc2.92 (Fernando Cacciola) -// 30 Oct 2001 Some fixes suggested by Daryle Walker (Fernando Cacciola) -// 25 Oct 2001 Initial boostification (Fernando Cacciola) -// 23 Jan 2004 Inital add to cvs (post review)s -// -#ifndef BOOST_NUMERIC_CONVERSION_CAST_25OCT2001_HPP -#define BOOST_NUMERIC_CONVERSION_CAST_25OCT2001_HPP - -#include - -#if BOOST_WORKAROUND(BOOST_MSVC, < 1300) || BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x582)) - -# include - -#else - -#include -#include +// TODO: Add this to config.hpp? +# if defined(BOOST_MSVC) && BOOST_MSVC < 1300 +# define BOOST_EXPLICIT_DEFAULT_TARGET , ::boost::type* = 0 +# else +# define BOOST_EXPLICIT_DEFAULT_TARGET +# endif namespace boost { - template - inline - Target numeric_cast ( Source arg ) - { - typedef boost::numeric::converter Converter ; - return Converter::convert(arg); - } +// See the documentation for descriptions of how to choose between +// static_cast<>, dynamic_cast<>, polymorphic_cast<> and polymorphic_downcast<> - using numeric::bad_numeric_cast; +// polymorphic_cast --------------------------------------------------------// + + // Runtime checked polymorphic downcasts and crosscasts. + // Suggested in The C++ Programming Language, 3rd Ed, Bjarne Stroustrup, + // section 15.8 exercise 1, page 425. + + template + inline Target polymorphic_cast(Source* x BOOST_EXPLICIT_DEFAULT_TARGET) + { + Target tmp = dynamic_cast(x); + if ( tmp == 0 ) throw std::bad_cast(); + return tmp; + } + +// polymorphic_downcast ----------------------------------------------------// + + // BOOST_ASSERT() checked polymorphic downcast. Crosscasts prohibited. + + // WARNING: Because this cast uses BOOST_ASSERT(), it violates + // the One Definition Rule if used in multiple translation units + // where BOOST_DISABLE_ASSERTS, BOOST_ENABLE_ASSERT_HANDLER + // NDEBUG are defined inconsistently. + + // Contributed by Dave Abrahams + + template + inline Target polymorphic_downcast(Source* x BOOST_EXPLICIT_DEFAULT_TARGET) + { + BOOST_ASSERT( dynamic_cast(x) == x ); // detect logic error + return static_cast(x); + } + +# undef BOOST_EXPLICIT_DEFAULT_TARGET } // namespace boost -#endif +# include - -#endif +#endif // BOOST_CAST_HPP