diff -r e20de85af2ee -r ce057bb09d0b ossrv_pub/boost_apis/boost/any.hpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/ossrv_pub/boost_apis/boost/any.hpp Fri Jun 04 16:20:51 2010 +0100 @@ -0,0 +1,238 @@ +// See http://www.boost.org/libs/any for Documentation. + +#ifndef BOOST_ANY_INCLUDED +#define BOOST_ANY_INCLUDED + +// what: variant type boost::any +// who: contributed by Kevlin Henney, +// with features contributed and bugs found by +// Ed Brey, Mark Rodgers, Peter Dimov, and James Curran +// when: July 2001 +// where: tested with BCC 5.5, MSVC 6.0, and g++ 2.95 + +#include +#include + +#include "boost/config.hpp" +#include +#include +#include +#include + +namespace boost +{ + class any + { + public: // structors + + any() + : content(0) + { + } + + template + any(const ValueType & value) + : content(new holder(value)) + { + } + + any(const any & other) + : content(other.content ? other.content->clone() : 0) + { + } + + ~any() + { + delete content; + } + + public: // modifiers + + any & swap(any & rhs) + { + std::swap(content, rhs.content); + return *this; + } + + template + any & operator=(const ValueType & rhs) + { + any(rhs).swap(*this); + return *this; + } + + any & operator=(const any & rhs) + { + any(rhs).swap(*this); + return *this; + } + + public: // queries + + bool empty() const + { + return !content; + } + + const std::type_info & type() const + { + return content ? content->type() : typeid(void); + } + +#ifndef BOOST_NO_MEMBER_TEMPLATE_FRIENDS + private: // types +#else + public: // types (public so any_cast can be non-friend) +#endif + + class placeholder + { + public: // structors + + virtual ~placeholder() + { + } + + public: // queries + + virtual const std::type_info & type() const = 0; + + virtual placeholder * clone() const = 0; + + }; + + template + class holder : public placeholder + { + public: // structors + + holder(const ValueType & value) + : held(value) + { + } + + public: // queries + + virtual const std::type_info & type() const + { + return typeid(ValueType); + } + + virtual placeholder * clone() const + { + return new holder(held); + } + + public: // representation + + ValueType held; + + }; + +#ifndef BOOST_NO_MEMBER_TEMPLATE_FRIENDS + + private: // representation + + template + friend ValueType * any_cast(any *); + + template + friend ValueType * unsafe_any_cast(any *); + +#else + + public: // representation (public so any_cast can be non-friend) + +#endif + + placeholder * content; + + }; + + class bad_any_cast : public std::bad_cast + { + public: + virtual const char * what() const throw() + { + return "boost::bad_any_cast: " + "failed conversion using boost::any_cast"; + } + }; + + template + ValueType * any_cast(any * operand) + { + return operand && operand->type() == typeid(ValueType) + ? &static_cast *>(operand->content)->held + : 0; + } + + template + const ValueType * any_cast(const any * operand) + { + return any_cast(const_cast(operand)); + } + + template + ValueType any_cast(const any & operand) + { + typedef BOOST_DEDUCED_TYPENAME remove_reference::type nonref; + +#ifdef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION + // If 'nonref' is still reference type, it means the user has not + // specialized 'remove_reference'. + + // Please use BOOST_BROKEN_COMPILER_TYPE_TRAITS_SPECIALIZATION macro + // to generate specialization of remove_reference for your class + // See type traits library documentation for details + BOOST_STATIC_ASSERT(!is_reference::value); +#endif + + const nonref * result = any_cast(&operand); + if(!result) + boost::throw_exception(bad_any_cast()); + return *result; + } + + template + ValueType any_cast(any & operand) + { + typedef BOOST_DEDUCED_TYPENAME remove_reference::type nonref; + +#ifdef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION + // The comment in the above version of 'any_cast' explains when this + // assert is fired and what to do. + BOOST_STATIC_ASSERT(!is_reference::value); +#endif + + nonref * result = any_cast(&operand); + if(!result) + boost::throw_exception(bad_any_cast()); + return *result; + } + + // Note: The "unsafe" versions of any_cast are not part of the + // public interface and may be removed at any time. They are + // required where we know what type is stored in the any and can't + // use typeid() comparison, e.g., when our types may travel across + // different shared libraries. + template + inline ValueType * unsafe_any_cast(any * operand) + { + return &static_cast *>(operand->content)->held; + } + + template + inline const ValueType * unsafe_any_cast(const any * operand) + { + return unsafe_any_cast(const_cast(operand)); + } +} + +// Copyright Kevlin Henney, 2000, 2001, 2002. All rights reserved. +// +// 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) + +#endif