January 2006 - Boost-users - lists.preview.boost.org

boost::iostreams - access object 'below' the stream
by Leon Mergen 24 Jan '06

24 Jan '06

Hello, Little question: I'm toying around to replace my socket_stream class with a boost::iostreams::stream class to implement a more generic approach... now, I use the socket file descriptor/handle as a unique identifier in my application, and so far this could easily be retrieved; however, when the boost::iostreams::stream "layer" is on top of my socket class, this is pretty much inaccessable. What is the most common approach to handle this problem ? I really don't want to resort to some kind of tuple which describes the stream and the handle, but at the moment, a construction like that is the only thing my mind can come up with... any suggestions ? Thanks in advance for any reactions. Regards, Leon Mergen

2 1

[lambda] "Invalid use of void expression"
by David A. Greene 24 Jan '06

24 Jan '06

I'm having some trouble with BLL and Boost.Function in this simple testcase: #include <boost/lambda/bind.hpp> #include <boost/function.hpp> #include <iostream> class Test { public: void foo(int a) { std::cout << "a is " << a << std::endl; }; }; template<typename Function> class Caller { private: Function func; public: Caller(Function f) : func(f) {}; void bar(void) { func(); }; }; int main(void) { Test tester; int value = 10; Caller<boost::function<void (void)> > printer(boost::lambda::bind(boost::lambda::bind(&Test::foo, tester, boost::lambda::_1), value)); printer.bar(); return(0); } The g++ 4.0.3 compiler complains (full trace below): /usr/include/boost/lambda/detail/lambda_functor_base.hpp:408: error: invalid use of void expression Is it not legal to bind a lambda-bound function? -Dave ---------------------- /usr/include/boost/lambda/detail/lambda_functor_base.hpp: In member function 'RET boost::lambda::lambda_functor_base<boost::lambda::action<2, Act>, Args>::call(A&, B&, C&, Env&) const [with RET = boost::tuples::null_type, A = const boost::tuples::null_type, B = const boost::tuples::null_type, C = const boost::tuples::null_type, Env = const boost::tuples::null_type, Act = boost::lambda::function_action<2, boost::lambda::detail::unspecified>, Args = boost::tuples::tuple<const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<3, boost::lambda::function_action<3, boost::lambda::detail::unspecified> >, boost::tuples::tuple<void (Test::* const)(int), const Test, const boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, const int, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]': /usr/include/boost/lambda/detail/lambda_functors.hpp:140: instantiated from 'typename T::sig<boost::tuples::null_type>::type boost::lambda::lambda_functor<Base>::operator()() const [with T = boost::lambda::lambda_functor_base<boost::lambda::action<2, boost::lambda::function_action<2, boost::lambda::detail::unspecified> >, boost::tuples::tuple<const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<3, boost::lambda::function_action<3, boost::lambda::detail::unspecified> >, boost::tuples::tuple<void (Test::* const)(int), const Test, const boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, const int, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >]' /usr/include/boost/function/function_template.hpp:136: instantiated from 'static void boost::detail::function::void_function_obj_invoker0<FunctionObj, R>::invoke(boost::detail::function::any_pointer) [with FunctionObj = boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<2, boost::lambda::function_action<2, boost::lambda::detail::unspecified> >, boost::tuples::tuple<const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<3, boost::lambda::function_action<3, boost::lambda::detail::unspecified> >, boost::tuples::tuple<void (Test::* const)(int), const Test, const boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, const int, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, R = void]' /usr/include/boost/function/function_template.hpp:479: instantiated from 'void boost::function0<R, Allocator>::assign_to(FunctionObj, boost::detail::function::function_obj_tag) [with FunctionObj = boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<2, boost::lambda::function_action<2, boost::lambda::detail::unspecified> >, boost::tuples::tuple<const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<3, boost::lambda::function_action<3, boost::lambda::detail::unspecified> >, boost::tuples::tuple<void (Test::* const)(int), const Test, const boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, const int, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, R = void, Allocator = std::allocator<void>]' /usr/include/boost/function/function_template.hpp:430: instantiated from 'void boost::function0<R, Allocator>::assign_to(Functor) [with Functor = boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<2, boost::lambda::function_action<2, boost::lambda::detail::unspecified> >, boost::tuples::tuple<const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<3, boost::lambda::function_action<3, boost::lambda::detail::unspecified> >, boost::tuples::tuple<void (Test::* const)(int), const Test, const boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, const int, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, R = void, Allocator = std::allocator<void>]' /usr/include/boost/function/function_template.hpp:294: instantiated from 'boost::function0<R, Allocator>::function0(Functor, typename boost::enable_if_c<boost::type_traits::ice_not<boost::is_integral<Functor>::value>::value, int>::type) [with Functor = boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<2, boost::lambda::function_action<2, boost::lambda::detail::unspecified> >, boost::tuples::tuple<const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<3, boost::lambda::function_action<3, boost::lambda::detail::unspecified> >, boost::tuples::tuple<void (Test::* const)(int), const Test, const boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, const int, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, R = void, Allocator = std::allocator<void>]' /usr/include/boost/function/function_template.hpp:637: instantiated from 'boost::function<R ()(), Allocator>::function(Functor, typename boost::enable_if_c<boost::type_traits::ice_not<boost::is_integral<Functor>::value>::value, int>::type) [with Functor = boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<2, boost::lambda::function_action<2, boost::lambda::detail::unspecified> >, boost::tuples::tuple<const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<3, boost::lambda::function_action<3, boost::lambda::detail::unspecified> >, boost::tuples::tuple<void (Test::* const)(int), const Test, const boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, const int, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, R = void, Allocator = std::allocator<void>]' lambda3.cc:27: instantiated from here /usr/include/boost/lambda/detail/lambda_functor_base.hpp:408: error: invalid use of void expression /usr/include/boost/lambda/detail/actions.hpp: In static member function 'static RET boost::lambda::function_action<3, T>::apply(A1&, A2&, A3&) [with RET = void, A1 = void (Test::* const)(int), A2 = const Test, A3 = const boost::tuples::null_type, T = boost::lambda::detail::unspecified]': /usr/include/boost/lambda/detail/lambda_functor_base.hpp:425: instantiated from 'RET boost::lambda::lambda_functor_base<boost::lambda::action<3, Act>, Args>::call(A&, B&, C&, Env&) const [with RET = void, A = const boost::tuples::null_type, B = const boost::tuples::null_type, C = const boost::tuples::null_type, Env = const boost::tuples::null_type, Act = boost::lambda::function_action<3, boost::lambda::detail::unspecified>, Args = boost::tuples::tuple<void (Test::* const)(int), const Test, const boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]' /usr/include/boost/lambda/detail/select_functions.hpp:61: instantiated from 'static RET boost::lambda::detail::r_select<RET>::go(const boost::lambda::lambda_functor<Arg>&, A&, B&, C&, Env&) [with Arg = boost::lambda::lambda_functor_base<boost::lambda::action<3, boost::lambda::function_action<3, boost::lambda::detail::unspecified> >, boost::tuples::tuple<void (Test::* const)(int), const Test, const boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >, A = const boost::tuples::null_type, B = const boost::tuples::null_type, C = const boost::tuples::null_type, Env = const boost::tuples::null_type, RET = void]' /usr/include/boost/lambda/detail/lambda_functor_base.hpp:408: instantiated from 'RET boost::lambda::lambda_functor_base<boost::lambda::action<2, Act>, Args>::call(A&, B&, C&, Env&) const [with RET = boost::tuples::null_type, A = const boost::tuples::null_type, B = const boost::tuples::null_type, C = const boost::tuples::null_type, Env = const boost::tuples::null_type, Act = boost::lambda::function_action<2, boost::lambda::detail::unspecified>, Args = boost::tuples::tuple<const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<3, boost::lambda::function_action<3, boost::lambda::detail::unspecified> >, boost::tuples::tuple<void (Test::* const)(int), const Test, const boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, const int, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]' /usr/include/boost/lambda/detail/lambda_functors.hpp:140: instantiated from 'typename T::sig<boost::tuples::null_type>::type boost::lambda::lambda_functor<Base>::operator()() const [with T = boost::lambda::lambda_functor_base<boost::lambda::action<2, boost::lambda::function_action<2, boost::lambda::detail::unspecified> >, boost::tuples::tuple<const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<3, boost::lambda::function_action<3, boost::lambda::detail::unspecified> >, boost::tuples::tuple<void (Test::* const)(int), const Test, const boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, const int, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >]' /usr/include/boost/function/function_template.hpp:136: instantiated from 'static void boost::detail::function::void_function_obj_invoker0<FunctionObj, R>::invoke(boost::detail::function::any_pointer) [with FunctionObj = boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<2, boost::lambda::function_action<2, boost::lambda::detail::unspecified> >, boost::tuples::tuple<const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<3, boost::lambda::function_action<3, boost::lambda::detail::unspecified> >, boost::tuples::tuple<void (Test::* const)(int), const Test, const boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, const int, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, R = void]' /usr/include/boost/function/function_template.hpp:479: instantiated from 'void boost::function0<R, Allocator>::assign_to(FunctionObj, boost::detail::function::function_obj_tag) [with FunctionObj = boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<2, boost::lambda::function_action<2, boost::lambda::detail::unspecified> >, boost::tuples::tuple<const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<3, boost::lambda::function_action<3, boost::lambda::detail::unspecified> >, boost::tuples::tuple<void (Test::* const)(int), const Test, const boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, const int, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, R = void, Allocator = std::allocator<void>]' /usr/include/boost/function/function_template.hpp:430: instantiated from 'void boost::function0<R, Allocator>::assign_to(Functor) [with Functor = boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<2, boost::lambda::function_action<2, boost::lambda::detail::unspecified> >, boost::tuples::tuple<const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<3, boost::lambda::function_action<3, boost::lambda::detail::unspecified> >, boost::tuples::tuple<void (Test::* const)(int), const Test, const boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, const int, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, R = void, Allocator = std::allocator<void>]' /usr/include/boost/function/function_template.hpp:294: instantiated from 'boost::function0<R, Allocator>::function0(Functor, typename boost::enable_if_c<boost::type_traits::ice_not<boost::is_integral<Functor>::value>::value, int>::type) [with Functor = boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<2, boost::lambda::function_action<2, boost::lambda::detail::unspecified> >, boost::tuples::tuple<const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<3, boost::lambda::function_action<3, boost::lambda::detail::unspecified> >, boost::tuples::tuple<void (Test::* const)(int), const Test, const boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, const int, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, R = void, Allocator = std::allocator<void>]' /usr/include/boost/function/function_template.hpp:637: instantiated from 'boost::function<R ()(), Allocator>::function(Functor, typename boost::enable_if_c<boost::type_traits::ice_not<boost::is_integral<Functor>::value>::value, int>::type) [with Functor = boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<2, boost::lambda::function_action<2, boost::lambda::detail::unspecified> >, boost::tuples::tuple<const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<3, boost::lambda::function_action<3, boost::lambda::detail::unspecified> >, boost::tuples::tuple<void (Test::* const)(int), const Test, const boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, const int, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, R = void, Allocator = std::allocator<void>]' lambda3.cc:27: instantiated from here /usr/include/boost/lambda/detail/actions.hpp:96: error: no matching function for call to 'boost::lambda::function_adaptor<void (Test::*)(int)>::apply(void (Test::* const&)(int), const Test&, const boost::tuples::null_type&)' /usr/include/boost/lambda/detail/function_adaptors.hpp:245: note: candidates are: static Result boost::lambda::function_adaptor<Result (Object::*)(Arg1)>::apply(Result (Object::*)(Arg1), Object*, A1&) [with RET = void, A1 = const boost::tuples::null_type, Object = Test, Arg1 = int, Result = void] /usr/include/boost/lambda/detail/function_adaptors.hpp:249: note: static Result boost::lambda::function_adaptor<Result (Object::*)(Arg1)>::apply(Result (Object::*)(Arg1), Object&, A1&) [with RET = void, A1 = const boost::tuples::null_type, Object = Test, Arg1 = int, Result = void] /usr/include/boost/lambda/detail/actions.hpp:96: error: return-statement with a value, in function returning 'void'

2 5

thread library
by Robert Hanson 24 Jan '06

24 Jan '06

I'm looking at porting a windows (win32) app to linux. Is there a good reason to consider the boost thread library over the linux thread library? Does boost provide a wrapper for threads, so that I won't need to change my source code when porting between the two?

7 13

How to reduce the boost library size
by Jianhong Wang 24 Jan '06

24 Jan '06

Hi I compiled version 1.33.1 under a Windows XP machine with MingW (gcc 3.4.2). The compiling is very smoothing. However the size of directory "boost" is around 1.27 GB. I believe there is some command to clean the building lib, but I could not find it. Any suggestion? thanks!

2 1

Tokenizer usage, combining escaped_list_ and char_?
by Jeremy Tudisco 24 Jan '06

24 Jan '06

I'm attempting to process a scripting language from a file through tokenizer (only recently found out about Spirit, more on that later), and am having difficulties, namely, in processing input like this: "[ ExampleRoutine input; switch( input.messageNumber ) { 1: "Number 1"; 2: "Stand. On one foot (and jump around)"; 3: ! a comment to be ignored input.messageNumber = 1; break; } ];" The ending quotes mark the input as a string literal, the internal are part of the file. The problem comes from the fact that I need to process certain separators as tokens, such as braces, parentheses, periods, end lines, etc, but also allow escape characters in the case of the quotes, which should be treated as one returned token. My current method of processing this is: typedef char_separator<char> CharSep; typedef tokenizer<CharSep> CharTokenizer; typedef CharTokenizer::iterator CTokenIter; const CharSep g_RoutineSep(" \t\n,", "\"';[]{}()<>.!"); #define S_QUOTE "\"" ... // meanwhile, inside a function body CharTokenizer tok( getRoutineFromFile(), g_RoutineSep ); CTokenIter curTok( tok.begin() ); for(; ( curTok != tok.end() ) && ( *curTok != S_CBRACKET ); ++curTok ) { string curWord; if( ( *curTok == S_QUOTE ) { for(++curTok; ( *curTok != S_QUOTE ) && ( curTok != tok.end() ); ++curTok) { curWord += *curTok + ' '; // sure, we could check to see if *curTok is a punctation mark, and if so // not include that last space, but a better way must exist! } } else { // assume it's a command word, and process it here } } Of course, this is prone to gross misinterpretation, as "switch( input.messageNumber )" would be handled in each iteration as "switch", "(", "input", ".", "messageNumber", ")". Yet, this same functionality breaks the string literal into unnatural spacings, as the above code would turn it into "Stand . On one foot ( and jump around ) ", which isn't desired. However, as it stands, escape_list_separator doesn't return the separators, it just acts upon them, so all that fancy operator parsing isn't possible out of the box, requiring breaking things like "switch(" and "input.messageNumber" into separate things. Possible, yes, but extra work. So, the question. Could my needs be satisfied by defining my own TokenizerFunction, and if so, is there a simpler/more exhaustive reference besides the page? Or, conversely, is it time to look into Spirit? - Veni, Vidi, Vemaili. I came, I saw, I replied. -- Jeremy Tudisco, circa now.

2 1

Re: [Boost-users] How to reduce the boost library size
by Merrill Cornish 24 Jan '06

24 Jan '06

Jianhong, If you did a simple Boost build without restricting the output, then your Boost output directory will have many variants of each library. For example, you will have static and dynamic libraries; libraries with and without debug information, libraries with and without threading. And, for each of the above, you will have a two copies of the library named with and without the Boost version number (e.g., -1_31_1) as a suffix. If you decided what combination of debug/threading/static/version you want, you can delete the others, or at least move them elsewhere. Merrill

1 0

Re: [Boost-users] boost::serialization stream exception
by Adrian Grigore 24 Jan '06

24 Jan '06

Jeff Flinn Wrote: >Open your streams with 'binary' mode. Thanks, Jeff! And sorry for the obvious blunder :-) Best Regards, -- Adrian Grigore -- Adrian Grigore adrian(a)lobstersoft.com Lobstersoft - Fun Brain-Bending Games For All Ages http://www.lobstersoft.com Member of the Association of Shareware Professionals

1 0

boost thread does not honour BOOST_ALL_DYN_LINK
by Inge Norum 24 Jan '06

24 Jan '06

The boost thread library does not honour the BOOST_ALL_DYN_LINK setting in config/user.hpp. Thread used to be only available as a dynamically linked library in version 1.31, and I see a note about this in the comment for BOOST_ALL_DYN_LINK. I guess that it now ought to honour this general setting, to avoid defaulting to static linkage even when this is defined? Regards, Inge Norum thread/detail/config.hpp: #if defined(BOOST_THREAD_BUILD_DLL) //Build dll #elif defined(BOOST_THREAD_BUILD_LIB) //Build lib #elif defined(BOOST_THREAD_USE_DLL) //Use dll #elif defined(BOOST_THREAD_USE_LIB) //Use lib #else //Use default # if defined(BOOST_HAS_WINTHREADS) # if defined(BOOST_MSVC) || defined(BOOST_INTEL_WIN) //For compilers supporting auto-tss cleanup //with Boost.Threads lib, use Boost.Threads lib # define BOOST_THREAD_USE_LIB # else //For compilers not yet supporting auto-tss cleanup //with Boost.Threads lib, use Boost.Threads dll # define BOOST_THREAD_USE_DLL # endif # else # define BOOST_THREAD_USE_LIB # endif #endif

2 1

Re: [Boost-users] Multi-Index compound key synthesis via MPL
by Joaquín Mª López Muñoz 24 Jan '06

24 Jan '06

[Luke, this message from you shows up at Google Groups frontend, but somehow it hasn't really made it to the users list. Responding to the list in the hope that at least this answer gets properly processed.] Luke Meyers ha escrito: > The indexed_by construct for a multi_index_container can be replaced by > an mpl::vector, so that the list can be synthesized. I would like to > do the same thing with compound_key, to synthesize such a key based on > a list of types. Can I do this? Alas there's no version of composite_key accepting an MPL sequence instead of the direct enumeration of the constituent key extractors. But with a little MPL and preprocessor stuff, however, you can do what you want, see the attached snippet. HTH, Joaquín M López Muñoz Telefónica, Investigación y Desarrollo

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[Boost][Bind] How to bind template function member
by Marc Viala 24 Jan '06

24 Jan '06

Hi, I would like to know how I can use boost::bind with template function member? To explain my problem, you will find hereafter an example code that demonstrates it. In this code, when we try to bind the function member X::g the compiler failed with tons of error message. Am I doing something wrong? Best regards, Marc Viala mailto:mviala@acticm.com ----------------------------------- Platform: VC++ 7.1 Boost 1.33.1 ----------------------------------- #include <boost/bind.hpp> #include <boost/function.hpp> struct X { template<typename A, typename B> void g(A& a, B& b) { std::cout << a << " " << b << '\n' ; } void f(int& i) { std::cout << i << '\n'; } } ; template<typename A, typename B> void e(A& a, B& b) { std::cout << a << " " << b << '\n' ; } int main(int argc, char* argv[]) { int a = 10, b = 11 ; X x ; boost::function<void (void)> pe = boost::bind(&e<int,int>, a, b) ; // <- OK pe() ; boost::function<void (void)> pg = boost::bind(&X::g<int,int>, &x, a, b) ; // <- Don't compile? pg() ; boost::function<void (void)> pf = boost::bind(&X::f, &x, a) ; // <- OK pf() ; }

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