January 2008 - Boost-users - lists.boost.org

Re: [Boost-users] [boost] [switch_] Compound Cases [was Case Concept]
by Steven Watanabe 15 Jan '08

15 Jan '08

AMDG Joel de Guzman wrote: > Steven Watanabe wrote: > >> My concern is >> 1) fall-through can't easily be added to the interface. >> > > I have an idea I'd like to post in another update to the > case concept. > Great. > The point is that it is just another case. Whatever the > sequenced_case is, it's just a model of the case concept. > Sure it still has to be documented, but not as a separate > concept, but as a model of it. > > Also, to me, it's most trivial to just make it an ET > tree: > > template< class CaseL, class CaseR > > struct binary_case > { > CaseL l; > CaseR r; > > binary_case(CaseL const& l, CaseR const& r) > : l(l), r(r) {} > > typedef mpl::joint_view< > typename CaseL::labels, typename CaseR::labels > > labels; > > template< typename Result, class I > > Result apply(I); > }; > > Key points: > > * apply is part of the concept. In this case, it dispatches > to l or r depending on I > > * hmmm.... maybe labels should be an mpl set. > No, thank you. mpl set is buggy and slow. Also, one thing that needs to be nailed down is: What Is I? Tobias was using it as the index into the list of labels: mpl::int_<0>, mpl::int_<1>, mpl::int_<2>, ... In my original interface and as you seem to be using it I is one of: mpl::at_c<labels, 0>::type, mpl::at_c<labels, 1>::type, mpl::at_c<labels, 2>::type In Christ, Steven Watanabe

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Re: [Boost-users] [boost] [switch_] Case Concept [ was Re: formal review of Switch library...]
by Steven Watanabe 14 Jan '08

14 Jan '08

AMDG Joel de Guzman wrote: > Valid Expressions: > > Expression Semantics > ---------- > -------------------------------------------------------- > C::labels An MPL Sequence of Integral Constants > I think that a case should only have a single label. Allowing multiple labels makes the implementation harder without adding any significant utility. See below. > case_<I>(f) Returns a Case object with supplied > <snip more generators> > These can return fusion sequences of cases instead of plain cases. This has the additional benefit that switch_ can be specified as taking a fusion sequence of cases, without having to handle a single case specially. > default_(f) Returns a Case object with an empty labels list. > forwarding to the encapsulated function object f. > From the standpoint of the implementor of switch_, how do I figure out which Case is the default? > * case_c and case_range_c are simple shortcuts. The type of > integral constant is int. The actual type can be casted to > the actual switch parameter. I think this is safe Since the value is known at compile time the cast can be checked at compile time to detect overflow. In Christ, Steven Watanabe

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Re: [Boost-users] [boost] [switch_] Case Concept [ was Re: formal review of Switch library...]
by Steven Watanabe 14 Jan '08

14 Jan '08

AMDG Tobias Schwinger wrote: > Joel de Guzman wrote: > >> c0, c1, ... cN Returns a fusion sequence of Case objects >> > > seemingly equivalent to > > (c0, c1, ... cN) > > (note: Application of comma operator ;-)). > > > ?! Why doesn't it just return another (compound) Case object and leave > the Sequence an unspecified implementation detail... > So you want switch_ to be template<class R, class I, class Cases> requires Case<Cases> && BuiltInIntegerOrEnum<I> R switch(I i, Cases cases); IMO, There is a very big problem here. Suppose that you have a fusion sequence that holds your cases and function objects coming from somewhere else. The problem of adapting it to switch_ is no easier than it would be with my original interface. In Christ, Steven Watanabe

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Re: [Boost-users] [boost::logging] using rolling files failed
by John Torjo 14 Jan '08

14 Jan '08

Hi Benjamin, Sorry for that. It's because I introduced a breaking change: after you initialize the log, call: g_logger->turn_cache_off(); That should do the trick. Best, John > Hi John, > > I'm working on integrating your last modifications about flushing > rolling files, but I encounter some problems. > > With version V0.11.7, I change rolling_file.hpp (see attached file) to > flush logs each time. It works fine. > > /destination::rolling_file_settings settings; > settings.file_count( 10 ); > settings.max_size_bytes( 5242880 ); > destination::rolling_file loggerFile( logFile.GetPath(), settings ); > g_logger->writer().add_destination( loggerFile ); > / > > With last version (revision 42765), I just add one line. / > / > > /destination::rolling_file_settings settings;/ > /settings.file_count( 10 );/ > /settings.max_size_bytes( 5242880 ); / > */=> settings.flush_each_time(true); // add this line/* > /destination::rolling_file loggerFile( logFile.GetPath(), settings );/ > /g_logger->writer().add_destination( loggerFile );/ > > Then it doesn't work. > I put a break point in rolling_file_info#write but my program does not > enter in it anymore ! > I think that rolling file objects are not instanciated because output > files are MY_FILE.txt and not MY_FILE.txt.1 > > Even if it will not compile alone, I give you my class Logger to see > my implementation. > > Regards, > Benjamin > > > ------------------------------------------------------------------------ > > // destination_rolling_file.hpp > > // Boost Logging library > // > // Author: John Torjo, www.torjo.com > // > // Copyright (C) 2007 John Torjo (see www.torjo.com for email) > // > // 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 for updates, documentation, and revision history. > // See http://www.torjo.com/log2/ for more details > > > #ifndef JT28092007_destination_rolling_file_HPP_DEFINED > #define JT28092007_destination_rolling_file_HPP_DEFINED > > #if defined(_MSC_VER) && (_MSC_VER >= 1020) > # pragma once > #endif > > #if defined(_MSC_VER) > #pragma warning ( disable : 4355) > #endif > > #include <boost/logging/detail/fwd.hpp> > #include <boost/logging/detail/manipulator.hpp> > #include <boost/logging/format/destination/convert_destination.hpp> > #include <fstream> > #include <string> > #include <sstream> > #include <boost/filesystem/path.hpp> > #include <boost/filesystem/operations.hpp> > > namespace boost { namespace logging { namespace destination { > > > /** > @brief Settings you can pass to the rolling file. To see how it's used, see @ref dealing_with_flags. > */ > struct rolling_file_settings { > typedef boost::logging::detail::flag<rolling_file_settings> flag; > > rolling_file_settings() > : max_size_bytes(this, 1024 * 1024) > , file_count(this, 10) > , initial_erase(this, false) > , start_where_size_not_exceeded(this, true) > {} > > /// maximum size in bytes, by default 1Mb > flag::t<int> max_size_bytes; > /// how many files has a rolling file, by default, 10 > flag::t<int> file_count; > /// if true, it initially erases all files from the rolling file (by default, false) > flag::t<bool> initial_erase; > /// if true, it starts with the first file that hasn't exceeded the max size; > /// otherwise, it starts with the first file (default = true) > flag::t<bool> start_where_size_not_exceeded; > }; > > namespace detail { > template<class convert_dest > > struct rolling_file_info { > > rolling_file_info (const std::string& name_prefix, rolling_file_settings flags ) > // many thanks to Martin Bauer > : m_name_prefix(name_prefix), m_flags(flags), m_cur_idx(0) { > namespace fs = boost::filesystem; > > if ( m_flags.initial_erase()) { > for ( int idx = 0; idx < m_flags.file_count(); ++idx) > if ( fs::exists( file_name(idx) )) > fs::remove( file_name(idx) ); > } > > // see what file to start from > if ( m_flags.start_where_size_not_exceeded() ) { > for ( m_cur_idx = 0; m_cur_idx < m_flags.file_count(); ++m_cur_idx ) > if ( fs::exists( file_name(m_cur_idx) )) { > if ( fs::file_size( file_name(m_cur_idx)) < m_flags.max_size_bytes() ) > // file hasn't reached max size > break; > } > else > // file not found, we'll create it now > break; > > } > > recreate_file(); > } > > std::string file_name(int idx) { > std::ostringstream out; > out << m_name_prefix << "." << (idx+1); > return out.str(); > } > > void recreate_file() { > m_out = boost::shared_ptr< std::basic_ofstream<char_type> >(new std::basic_ofstream<char_type>( file_name(m_cur_idx).c_str(), > std::ios_base::out | std::ios_base::app)); > m_cur_size = 0; > } > > template<class msg_type> void write( const msg_type& msg) { > convert_dest::write(msg, (*m_out) ); > > // bdd 2007-12-10 : flush each time > m_cur_size += static_cast<int>( msg.size() ); > m_out->flush(); > > // bdd > //if ( m_out->tellp() > m_flags.max_size_bytes()) { > if ( m_cur_size > m_flags.max_size_bytes()) { > m_cur_idx = (m_cur_idx + 1) % m_flags.file_count(); > recreate_file(); > } > } > > boost::shared_ptr< std::basic_ofstream<char_type> > m_out; > std::string m_name_prefix; > rolling_file_settings m_flags; > // the index of the current file > int m_cur_idx; > > // bdd 2007-12-10 : flush each time > //size_t m_cur_size; > int m_cur_size; > }; > } > > /** > @brief Writes to multiple files: name_prefix.1, name_prefix.2, ... name_prefix.N, and then restarts from 1. > > We first write to name_prefix.1. > > The log has a max_size. When max_size is reached, we start writing to name_prefix.2. When max_size is reached, we start writing to name_prefix.3. > And so on, until we reach name_prefix.N (N = file_count). When that gets fool, we start over, with name_prefix.1. > */ > template<class convert_dest = do_convert_destination > struct rolling_file_t : is_generic, non_const_context<detail::rolling_file_info<convert_dest> > { > typedef non_const_context<detail::rolling_file_info<convert_dest> > non_const_context_base; > > /** > Constructs a rolling file > > @param name_prefix the name to be used as prefix for the files > > @param flags [optional] extra settings to pass to the rolling file. See rolling_file_settings and @ref dealing_with_flags. > */ > rolling_file_t(const std::string & name_prefix, rolling_file_settings flags = rolling_file_settings() ) : non_const_context_base(name_prefix, flags) {} > > template<class msg_type> void operator()( const msg_type & msg) const { > non_const_context_base::context().write(msg); > } > > bool operator==(const rolling_file_t & other) const { > return non_const_context_base::context().m_name_prefix == other.context().m_name_prefix; > } > }; > > /** @brief rolling_file_t with default values. See rolling_file_t > > @copydoc rolling_file_t > */ > typedef rolling_file_t<> rolling_file; > > > > > }}} > > #endif > > > ------------------------------------------------------------------------ > > > > //============================================================================= > // Includes > //============================================================================= > #include "StdAfx.h" > #include "common/log/Logger.h" > > //----- MEDCommon ----- > #include "common/system/ApplicationHelper.h" > #include "common/io/Directory.h" > #include "common/system/Time.h" > > //----- boost ----- > #pragma warning(disable: 4541) > > #include "boost/logging/tags.hpp" > #include "boost/logging/defaults.hpp" > #include "boost/logging/format.hpp" > #include "boost/logging/format_all.hpp" > #include "boost/logging/format_fwd.hpp" > #include "boost/logging/format_ts.hpp" > #include "boost/logging/logging.hpp" > #include "boost/logging/detail/error.hpp" > #include "boost/logging/detail/filter.hpp" > #include "boost/logging/detail/find_gather.hpp" > #include "boost/logging/detail/format_msg_type.hpp" > #include "boost/logging/detail/format_write_detail.hpp" > #include "boost/logging/detail/forward_constructor.hpp" > #include "boost/logging/detail/fwd.hpp" > #include "boost/logging/detail/level.hpp" > #include "boost/logging/detail/log_keeper.hpp" > #include "boost/logging/detail/logger.hpp" > #include "boost/logging/detail/macros.hpp" > #include "boost/logging/detail/manipulator.hpp" > #include "boost/logging/detail/scenario.hpp" > #include "boost/logging/detail/template.hpp" > #include "boost/logging/detail/use_format_write.hpp" > // raw_doc ? > #include "boost/logging/detail/ts/ts.hpp" > #include "boost/logging/detail/ts/ts_boost.hpp" > #include "boost/logging/detail/ts/ts_none.hpp" > //#include "boost/logging/detail/ts/ts_posix.hpp" > #include "boost/logging/detail/ts/ts_resource.hpp" > #include "boost/logging/detail/ts/ts_win32.hpp" > #include "boost/logging/detail/tss/tss.hpp" > #include "boost/logging/detail/tss/tss_ensure_proper_delete.hpp" > #include "boost/logging/detail/tss/tss_impl.hpp" > //#include "boost/logging/detail/tss/tss_impl_pthread.hpp" > #include "boost/logging/detail/tss/tss_impl_win32.hpp" > #include "boost/logging/format/array.hpp" > #include "boost/logging/format/op_equal.hpp" > #include "boost/logging/format/optimize.hpp" > #include "boost/logging/format/destination/convert_destination.hpp" > #include "boost/logging/format/destination/defaults.hpp" > #include "boost/logging/format/destination/file.hpp" > #include "boost/logging/format/destination/rolling_file.hpp" > #include "boost/logging/format/destination/shared_memory.hpp" > #include "boost/logging/format/formatter/convert_format.hpp" > #include "boost/logging/format/formatter/defaults.hpp" > #include "boost/logging/format/formatter/tags.hpp" > #include "boost/logging/format/formatter/thread_id.hpp" > #include "boost/logging/format/formatter/time.hpp" > #include "boost/logging/gather/ostream_like.hpp" > #include "boost/logging/tag/defaults.hpp" > #include "boost/logging/writer/format_write.hpp" > #include "boost/logging/writer/on_dedicated_thread.hpp" > #include "boost/logging/writer/ts_write.hpp" > > using namespace boost::logging; > > //----- Step 3 : Specify your logging class(es) ----- > //typedef logger_format_write< > log_type; > // thread safe > typedef logger_format_write< default_, default_, writer::threading::ts_write > log_type; > //typedef logger_format_write< default_, default_, writer::threading::on_dedicated_thread > log_type; > > //----- Step 4: declare which filters and loggers you'll use (usually in a header file) ----- > // filter > BOOST_DECLARE_LOG_FILTER(g_log_level, level::holder ) > BOOST_DECLARE_LOG_FILTER(g_audit_filter, filter::ts ) > > // logger > BOOST_DECLARE_LOG(g_logger, log_type) > BOOST_DECLARE_LOG(g_audit, log_type) > BOOST_DECLARE_LOG(g_debug, log_type) > > //----- Step 5: define the macros through which you'll log ----- > > //----- Step 6: Define the filters and loggers you'll use (usually in a source file) ----- > // filter > BOOST_DEFINE_LOG_FILTER(g_log_level, level::holder ) // holds the application log level > BOOST_DEFINE_LOG_FILTER(g_audit_filter, filter::ts ) > BOOST_DEFINE_LOG_FILTER(g_debug_filter, filter::ts ) > //BOOST_DEFINE_LOG_FILTER(g_audit_filter, filter::no_ts ) > // logger > BOOST_DEFINE_LOG(g_logger, log_type) > BOOST_DEFINE_LOG(g_audit, log_type) > BOOST_DEFINE_LOG(g_debug, log_type) > > using namespace common::log; > > //============================================================================= > // Global functions > //============================================================================= > void > Audit( const std::ostringstream & msg ) > { > Info( msg ); > BOOST_LOG_USE_LOG_IF_FILTER(g_audit, g_audit_filter->is_enabled() ) << "\t[AUDIT]\t" << msg.str(); > } > > void > Debug( const std::ostringstream & msg ) > { > BOOST_LOG_USE_LOG_IF_FILTER(g_debug, g_debug_filter->is_enabled() ) << "\t[DEBUG]\t" << msg.str(); > } > > void > Trace2( const std::ostringstream & msg ) > { > Debug( msg ); > common::log::Logger::s_traces.Push( msg.str() ); > } > > void > Info( const std::ostringstream & msg ) > { > BOOST_LOG_USE_LOG_IF_LEVEL(g_logger, g_log_level, info ) << "\t[INFO]\t" << msg.str(); > BOOST_LOG_USE_LOG_IF_FILTER(g_debug, g_debug_filter->is_enabled() ) << "\t[INFO]\t" << msg.str(); > } > > void > Warning( const std::ostringstream & msg ) > { > BOOST_LOG_USE_LOG_IF_LEVEL(g_logger, g_log_level, warning ) << "\t[WARN]\t" << msg.str(); > BOOST_LOG_USE_LOG_IF_FILTER(g_debug, g_debug_filter->is_enabled() ) << "\t[WARN]\t" << msg.str(); > } > > void > Error( const std::ostringstream & msg ) > { > if ( ! common::log::Logger::IsInitialized() ) > { > common::log::Logger::Init( "INIT" ); > } > if ( ! common::log::Logger::s_traces.IsEmpty() ) > { > // > vector<string> traces = common::log::Logger::s_traces.ToArray(); > for ( size_t i=0; i < traces.size(); i++ ) > { > BOOST_LOG_USE_LOG_IF_LEVEL(g_logger, g_log_level, error ) << "\t[TRACE]\t" << traces[i]; > } > } > BOOST_LOG_USE_LOG_IF_LEVEL(g_logger, g_log_level, error ) << "\t[ERROR]\t" << msg.str(); > BOOST_LOG_USE_LOG_IF_FILTER(g_debug, g_debug_filter->is_enabled() ) << "\t[ERROR]\t" << msg.str(); > } > > void > Exception( const std::ostringstream & msg ) > { > if ( ! common::log::Logger::IsInitialized() ) > { > common::log::Logger::Init( "INIT" ); > } > if ( ! common::log::Logger::s_traces.IsEmpty() ) > { > // > vector<string> traces = common::log::Logger::s_traces.ToArray(); > for ( size_t i=0; i < traces.size(); i++ ) > { > BOOST_LOG_USE_LOG_IF_LEVEL(g_logger, g_log_level, fatal ) << "\t[TRACE]\t" << traces[i]; > } > } > BOOST_LOG_USE_LOG_IF_LEVEL(g_logger, g_log_level, fatal ) << "\t[FATAL]\t" << msg.str(); > BOOST_LOG_USE_LOG_IF_FILTER(g_debug, g_debug_filter->is_enabled() ) << "\t[FATAL]\t" << msg.str(); > } > > > > //============================================================================= > // Class attributs > //============================================================================= > bool Logger::s_isInitialized = false; > bool Logger::MODE_DEBUG = false; > common::container::RollingStack<string> Logger::s_traces( 15 ); > > //============================================================================= > // Class methods > //============================================================================= > void > Logger::SetLevel( LEVEL level ) > { > g_audit_filter->set_enabled(true); > g_debug_filter->set_enabled(false); > switch ( level ) > { > case LEVEL_DEBUG : > Logger::MODE_DEBUG = true; > g_debug_filter->set_enabled(true); > g_log_level->set_enabled(level::debug); // debug > break; > case LEVEL_INFO : > g_log_level->set_enabled(level::info); // info + warning + ... > break; > case LEVEL_ERROR : > g_log_level->set_enabled(level::error); // error + fatal + ... > break; > default: > g_log_level->set_enabled(level::info); > break; > } > > } > > bool > Logger::IsInitialized() > { > return s_isInitialized; > } > > void > Logger::Init( const string & product ) > { > if ( s_isInitialized ) > { > return; > } > > // check log dir > common::system::ApplicationHelper ah; > common::io::Directory dir( ah.GetPath() + "logfiles" ); > dir.CheckAndCreate(); > > // init file names > //string date = common::system::Time::GetTime( common::system::Time::FORMAT_AAAA_MM_JJ ); > //common::io::File logFile( dir.GetPath() + date + "_" + product + ".txt" ); > //common::io::File auditFile( dir.GetPath() + date + "_AUDIT_" + product + ".txt" ); > common::io::File logFile( dir.GetPath() + product + ".txt" ); > common::io::File auditFile( dir.GetPath() + "AUDIT_" + product + ".txt" ); > common::io::File debugFile( dir.GetPath() + "DEBUG_" + product + ".txt" ); > > // Step 7: add formatters and destinations > // That is, how the message is to be formatted... > g_logger->writer().add_formatter( formatter::time("$dd/$MM/$yyyy - $hh:$mm.$ss ") ); > g_logger->writer().add_formatter( formatter::idx() ); > g_logger->writer().add_formatter( formatter::append_newline() ); > //g_log_err->writer().add_formatter( formatter::tag::module() ); // tag::file_line() ); > //g_log_err->writer().add_formatter( formatter::tag::level() ); > > g_audit->writer().add_formatter( formatter::time("$dd/$MM/$yyyy - $hh:$mm.$ss ") ); > g_audit->writer().add_formatter( formatter::idx() ); > g_audit->writer().add_formatter( formatter::append_newline() ); > > g_debug->writer().add_formatter( formatter::time("$dd/$MM/$yyyy - $hh:$mm.$ss ") ); > g_debug->writer().add_formatter( formatter::idx() ); > g_debug->writer().add_formatter( formatter::append_newline() ); > > g_logger->writer().add_destination( destination::cout() ); > > // bdd : rolling file : pb de flush (garde les donnees en cache) > destination::rolling_file_settings settings; > settings.file_count( 10 ); > settings.max_size_bytes( 5242880 ); // bytes = 5M > //settings.flush_each_time(true); > destination::rolling_file loggerFile( logFile.GetPath(), settings ); > g_logger->writer().add_destination( loggerFile ); > > g_debug->writer().add_destination( destination::dbg_window() ); > > destination::rolling_file_settings settingsD; > settingsD.file_count( 30 ); > settingsD.max_size_bytes( 10000000 ); // ~10M > //settingsD.flush_each_time(true); > g_debug->writer().add_destination( destination::rolling_file( debugFile.GetPath(), settingsD ) ); > > // bdd xml : en attente > //g_log_err->writer().add_destination( as_xml("logerror.xml") ); > > g_audit->writer().add_destination( destination::file( auditFile.GetPath() ) ); > > #ifdef _DEBUG > SetLevel( Logger::LEVEL_DEBUG ); > #else > SetLevel( Logger::LEVEL_INFO ); > #endif > s_isInitialized = true; > // Step 9 : Enjoy! > } > > > //============================================================================= > // Constructor and destructor > //============================================================================= > Logger::Logger(void) > : common::app::Object("common::log::Logger") > { > } > > Logger::~Logger(void) > { > } > > //============================================================================= > // Public methods > //============================================================================= > > > ------------------------------------------------------------------------ > > //* Step 1: (optional) Specify your format message class and/or destination message class. By default, it's std::(w)string. You'll use this when you want a optimize string class. > //* Step 2: (optional) Specify your formatter & destination base classes > //* Step 3: Specify your logger class(es) > //* Step 4: Declare the filters and loggers you'll use (in a header file) > //* Step 5: Define the macros through which you'll do logging > //* Step 6: Define the loggers and the filters you'll use (in a source file). We need this separation (into declaring and defining the logs/filters), in order to make compilation times fast. > //* Step 7: Add formatters and destinations. That is, how the message is to be formatted... > //* Step 8: Use it > //* Step 9: Enjoy the results! > > //* debug (smallest level), > //* info, > //* warning , > //* error , > //* fatal (highest level) > > #ifndef _COMMON_LOG_LOGGER_H_ > #define _COMMON_LOG_LOGGER_H_ > #pragma once > > //============================================================================= > // Includes > //============================================================================= > //----- MEDCommon ----- > #include "../commonIncludes.h" > #include "../app/Object.h" > #include "StackLog.h" > #include "common/txt/StringHelper.h" > #include "common/container/RollingStack.h" > > void MEDCOMMON_API Audit( const std::ostringstream & msg ); > void MEDCOMMON_API Debug( const std::ostringstream & msg ); > void MEDCOMMON_API Trace2( const std::ostringstream & msg ); > void MEDCOMMON_API Info( const std::ostringstream & msg ); > void MEDCOMMON_API Warning( const std::ostringstream & msg ); > void MEDCOMMON_API Error( const std::ostringstream & msg ); > void MEDCOMMON_API Exception( const std::ostringstream & msg ); > > #define MED_FUNCTION \ > common::log::StackLog log( __FUNCTION__ ); > > #define MED_FUNCTION2( msg ) \ > ostringstream s; \ > s << msg; \ > common::log::StackLog log( __FUNCTION__, s ); > > #define MED_METHOD( object ) \ > common::log::StackLog log( object,__FUNCTION__ ); > > #define MED_METHOD2( object, params ) \ > ostringstream s; \ > s << params; \ > common::log::StackLog log( object,__FUNCTION__, s ); > > #define MED_AUDIT( module, msg ) \ > { \ > ostringstream s; \ > s << "[" << module << "]\t" \ > << msg; \ > Audit( s ); \ > } > > #define MED_DBG2( module, msg ) \ > { \ > if ( common::log::Logger::MODE_DEBUG ) \ > { \ > string file = __FILE__; \ > string fileName = common::txt::StringHelper::LastToken(file,"\\"); \ > ostringstream s; \ > s << "[" << module << "]\t" \ > << msg \ > << " (" \ > << fileName \ > << "#" \ > << __FUNCTION__ \ > << " L." \ > << __LINE__ \ > << ")"; \ > Debug( s ); \ > } \ > } > > #define MED_TRC2( module, msg ) \ > { \ > string file = __FILE__; \ > string fileName = common::txt::StringHelper::LastToken(file,"\\"); \ > ostringstream s; \ > s << "[" << module << "]\t" \ > << msg \ > << " (" \ > << fileName \ > << "#" \ > << __FUNCTION__ \ > << " L." \ > << __LINE__ \ > << ")"; \ > Trace2( s ); \ > } > > #define MED_INF2( module, msg ) \ > { \ > ostringstream s; \ > s << "[" << module << "]\t" \ > << msg; \ > Info( s ); \ > } > > #define MED_WARN2( module, msg ) \ > { \ > string file = __FILE__; \ > string fileName = common::txt::StringHelper::LastToken(file,"\\"); \ > ostringstream s; \ > s << "[" << module << "]\t" \ > << msg \ > << " (" \ > << fileName \ > << "#" \ > << __FUNCTION__ \ > << " L." \ > << __LINE__ \ > << ")"; \ > Warning( s ); \ > } > > #define MED_ERR2( module, msg ) \ > { \ > string file = __FILE__; \ > string fileName = common::txt::StringHelper::LastToken(file,"\\"); \ > ostringstream s; \ > s << "[" << module << "]\t" \ > << msg \ > << " (" \ > << fileName \ > << "#" \ > << __FUNCTION__ \ > << " L." \ > << __LINE__ \ > << ")"; \ > Error( s ); \ > } > > #define MED_EXC2( module, msg ) \ > { \ > string file = __FILE__; \ > string fileName = common::txt::StringHelper::LastToken(file,"\\"); \ > ostringstream s; \ > s << "[" << module << "]\t" \ > << msg \ > << " (" \ > << fileName \ > << "#" \ > << __FUNCTION__ \ > << " L." \ > << __LINE__ \ > << ")"; \ > Exception( s ); \ > } > > namespace common > { > namespace log > { > class MEDCOMMON_API Logger : public common::app::Object > { > > > > //============================================================================= > // Constants > //============================================================================= > public: > enum LEVEL { > LEVEL_DEBUG , > LEVEL_INFO , > LEVEL_ERROR }; > > //============================================================================= > // Class attributs > //============================================================================= > public: > static bool MODE_DEBUG; > // traces > static common::container::RollingStack<string> s_traces; > > private: > static bool s_isInitialized; > > //============================================================================= > // Class methods > //============================================================================= > public: > static void SetProduct( const string & product ); > static bool IsInitialized(); > static void Init( const string & product ); > static void SetLevel( LEVEL level ); > > //============================================================================= > // Attributs > //============================================================================= > private: > > > //============================================================================= > // Constructor and destructor > //============================================================================= > private: > Logger(); > virtual ~Logger(); > > //============================================================================= > // Public methods > //============================================================================= > public: > > //============================================================================= > // Other methods > //============================================================================= > protected: > > }; > } // namespace log > } // namespace common > > #endif // _COMMON_LOG_LOGGER_H_ > > -- http://John.Torjo.com -- C++ expert ... call me only if you want things done right

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[Math] Feedback wanted on design issue.
by John Maddock 14 Jan '08

14 Jan '08

Hi folks I'd like some user feedback on an error-handling design issue if you're all willing :-) To the Sandbox "development" version of Boost.Math I've recently added equivalent functionality to the C99 round/trunc/modf functions: these convert floating point values to integers or to integer and fractional parts. However, there are two possible error conditions: 1) The input value is not a number (NaN). 2) The input value is outside the range of the integer type. We could handle these using the existing error handlers for domain_error's and overflow_error's respectively, but there's a problem: Users may legitimately turn off the throwing of exceptions from domain or overflow errors and prefer the functions to return NaN's and infinities instead. But this clearly wouldn't make as much sense for these particular conversion functions given that integers don't support either of these states.... So I'm tempted to add another error handler specific for integer conversion failures: the question then is whether this is starting down a slippery slope to too many error types making the library too hard to understand/use. Currently we already have: Pole Errors. Domain Errors. Overflow Errors. Underflow Errors. Denorm Errors. Internal Evaluation Errors. See http://svn.boost.org/svn/boost/trunk/libs/math/doc/sf_and_dist/html/math_to… for the details. So am I going overboard with error types, or worrying about nothing? Thanks for any thoughts/user experience you may have, Regards, John Maddock.

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testing , please ignore
by John Torjo 14 Jan '08

14 Jan '08

-- http://John.Torjo.com -- C++ expert ... call me only if you want things done right

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Question about link in VC7.1
by Michael Qi 14 Jan '08

14 Jan '08

Hi list users, I am using VC.net 2003 and use boost installer to install boost. I read the getting started guide and when link got an error. I configured VC to Multithreaded and the compilation succeeded, the link error is: LINK : fatal error LNK1104: could not open file "libboost_regex-vc71-mt-sgd-1_34_1.lib" and in boost lib directory the file libboost_regex-vc71-mt-1_34_1.lib existed, not the one with "sgd" Why VC　want sgd? Any suggestion is welcomed:) Regards HeQi

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the review of the switch library ends today, January 13th
by Stjepan Rajko 14 Jan '08

14 Jan '08

The review of the Switch library submitted by Steven Watanabe ends today (Sunday, January 13th). I would like to thank Steven for submitting a very useful library, as well as all those who have submitted reviews and/or contributed to the discussion (especially Tobias Schwinger and Joel de Guzman who have put in quite a bit of effort towards enhancing the design of the library). I will send a more detailed summary of the review as well as a decision in the following days. I currently have only 3 reviews to base a decision on, so any additional votes that anyone would like to contribute in the very near future would be very welcome. Regards, Stjepan

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Re: [Boost-users] Casting this pointer to a number
by sj＠sjcomp.com 13 Jan '08

13 Jan '08

On Sun, 13 Jan 2008 16:04:36 +0100, Zeljko Vrba, zvrba(a)ifi.uio.no wrote: > Why? What is it going to do with the ID? Why not make the ID a > void* pointer? > And what semantics does this "unique identification" have? Once an object is > deleted, another new'd object may get its address; I can hardly qualify that > as "unique ID". I have a set of objects and these objects have corresponding representations in the other part of my program (for debugging purposes [visualization]). Two parts of the program do not know about each other. One part calls a functions f and another part receives the call. I need to know what object initiated this call. It's given that objects are not destroyed, hence this is unique in that case. Making it void* is an option. Though I was looking for a more elegant solution. Thanks for the example. Thanks. -- Regards, Alexander. http://sjcomp.com

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Casting this pointer to a number
by sj＠sjcomp.com 13 Jan '08

13 Jan '08

Hello, I'd like to provide a function with an unique identifier: void f(size_t UniqueId); This function is going to be called from within class member functions like that: class a { a() { f((size_t)this); } }; Right now the old style cast works. The question is how do I make conversion using numeric_cast? If I use: f(boost::numeric_cast<size_t>(this)); I get a compilation error: error C2665: 'ceil' : none of the 3 overloads could convert all the argument types I guess another question is: should I bother replacing this old-style cast, maybe there is a better way to approach this situation in general? Thanks.

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