August 2010 - Boost - lists.boost.org

[chrono] Compatibility issues with 1.44
by Roland Bock 10 Aug '10

10 Aug '10

Hi Vicente, do you have an estimate for an update of Boost.Chrono which is compatible with the upcoming 1.44 version of boost? I just tried the daily snapshot provided by Beman with the current Chrono zip: * Compilation of Boost.Chrono fails * Boost.Chrono zip contains changes for parts of Boost.Thread Are these still needed/compatible? Also (not related to 1.44, but also 1.41, at least), there are many warnings issued by the compiler. It seems to me that they are somehow related to the constructors of duration, but I haven't been able to figure them out. These also occur when compiling client code. A log file is attached. Generated on Ubuntu-10.4, 64bit, gcc-4.4.3 Regards, Roland PS: Snapshot: http://boost.cowic.de/rc/ (boost-posix-2010-08-02.tar.bz2) Boost.Chrono: http://www.boostpro.com/vault/index.php?&direction=0&order=&directory=System http://svn.boost.org/svn/boost/sandbox/chrono/libs/chrono/doc/html/index.ht…. [...] common.mkdir build/boost/bin.v2/libs/chrono common.mkdir build/boost/bin.v2/libs/chrono/build common.mkdir build/boost/bin.v2/libs/chrono/build/gcc-4.4.3 common.mkdir build/boost/bin.v2/libs/chrono/build/gcc-4.4.3/release common.mkdir build/boost/bin.v2/libs/chrono/build/gcc-4.4.3/release/threading-multi gcc.compile.c++ build/boost/bin.v2/libs/chrono/build/gcc-4.4.3/release/threading-multi/chrono.o In file included from libs/chrono/src/chrono.cpp:40: libs/chrono/src/posix/chrono.cpp: In static member function ‘static boost::chrono::time_point<boost::chrono::system_clock, boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> > > boost::chrono::system_clock::now()’: libs/chrono/src/posix/chrono.cpp:27: error: no matching function for call to ‘boost::system::system_error::system_error(int&, const boost::system::error_category& (&)(), const char [21])’ ./boost/system/system_error.hpp:43: note: candidates are: boost::system::system_error::system_error(int, const boost::system::error_category&, const char*) ./boost/system/system_error.hpp:39: note: boost::system::system_error::system_error(int, const boost::system::error_category&, const std::string&) ./boost/system/system_error.hpp:36: note: boost::system::system_error::system_error(int, const boost::system::error_category&) ./boost/system/system_error.hpp:33: note: boost::system::system_error::system_error(boost::system::error_code, const char*) ./boost/system/system_error.hpp:30: note: boost::system::system_error::system_error(boost::system::error_code, const std::string&) ./boost/system/system_error.hpp:27: note: boost::system::system_error::system_error(boost::system::error_code) ./boost/system/system_error.hpp:25: note: boost::system::system_error::system_error(const boost::system::system_error&) libs/chrono/src/posix/chrono.cpp:31: warning: suggest parentheses around ‘&&’ within ‘||’ In file included from ./boost/type_traits.hpp:42, from ./boost/ratio.hpp:38, from ./boost/chrono/chrono.hpp:73, from libs/chrono/src/chrono.cpp:14: ./boost/type_traits/is_convertible.hpp: At global scope: ./boost/type_traits/is_convertible.hpp: In instantiation of ‘const bool boost::detail::is_convertible_basic_impl<boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> >&, boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> > >::value’: ./boost/type_traits/is_convertible.hpp:295: instantiated from ‘const bool boost::detail::is_convertible_impl<boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> >, boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> > >::value’ ./boost/type_traits/is_convertible.hpp:418: instantiated from ‘boost::is_convertible<boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> >, boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> > >’ ./boost/utility/enable_if.hpp:36: instantiated from ‘boost::enable_if<boost::is_convertible<boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> >, boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> > >, void>’ libs/chrono/src/posix/chrono.cpp:31: instantiated from here ./boost/type_traits/is_convertible.hpp:136: warning: suggest parentheses around ‘&&’ within ‘||’ ./boost/type_traits/is_convertible.hpp: In instantiation of ‘const bool boost::detail::is_convertible_basic_impl<boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> >&, boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> > >::value’: ./boost/type_traits/is_convertible.hpp:295: instantiated from ‘const bool boost::detail::is_convertible_impl<boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> >, boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> > >::value’ ./boost/type_traits/is_convertible.hpp:418: instantiated from ‘boost::is_convertible<boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> >, boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> > >’ ./boost/utility/enable_if.hpp:36: instantiated from ‘boost::enable_if<boost::is_convertible<boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> >, boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> > >, void>’ libs/chrono/src/posix/chrono.cpp:31: instantiated from here ./boost/type_traits/is_convertible.hpp:136: warning: initializing argument 1 of ‘static boost::type_traits::yes_type boost::detail::checker<T>::_m_check(T, int) [with T = boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> >]’ In file included from libs/chrono/src/chrono.cpp:14: ./boost/chrono/chrono.hpp: In copy constructor ‘boost::chrono::time_point<boost::chrono::system_clock, boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> > >::time_point(const boost::chrono::time_point<boost::chrono::system_clock, boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> > >&)’: ./boost/chrono/chrono.hpp:838: warning: suggest parentheses around ‘&&’ within ‘||’ ./boost/chrono/chrono.hpp:838: warning: suggest parentheses around ‘&&’ within ‘||’ In file included from libs/chrono/src/chrono.cpp:40: libs/chrono/src/posix/chrono.cpp: In static member function ‘static boost::chrono::time_point<boost::chrono::system_clock, boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> > > boost::chrono::system_clock::now()’: libs/chrono/src/posix/chrono.cpp:31: note: synthesized method ‘boost::chrono::time_point<boost::chrono::system_clock, boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> > >::time_point(const boost::chrono::time_point<boost::chrono::system_clock, boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> > >&)’ first required here libs/chrono/src/posix/chrono.cpp: In static member function ‘static boost::chrono::time_point<boost::chrono::system_clock, boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> > > boost::chrono::system_clock::now(boost::system::error_code&)’: libs/chrono/src/posix/chrono.cpp:39: error: no matching function for call to ‘boost::system::error_code::assign(int&, const boost::system::error_category& (&)())’ ./boost/system/error_code.hpp:326: note: candidates are: void boost::system::error_code::assign(int, const boost::system::error_category&) libs/chrono/src/posix/chrono.cpp:45: warning: suggest parentheses around ‘&&’ within ‘||’ libs/chrono/src/posix/chrono.cpp: In static member function ‘static boost::chrono::time_point<boost::chrono::system_clock, boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> > > boost::chrono::system_clock::from_time_t(time_t)’: libs/chrono/src/posix/chrono.cpp:55: warning: suggest parentheses around ‘&&’ within ‘||’ libs/chrono/src/posix/chrono.cpp: In static member function ‘static boost::chrono::time_point<boost::chrono::monotonic_clock, boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> > > boost::chrono::monotonic_clock::now()’: libs/chrono/src/posix/chrono.cpp:66: error: no matching function for call to ‘boost::system::system_error::system_error(int&, const boost::system::error_category& (&)(), const char [24])’ ./boost/system/system_error.hpp:43: note: candidates are: boost::system::system_error::system_error(int, const boost::system::error_category&, const char*) ./boost/system/system_error.hpp:39: note: boost::system::system_error::system_error(int, const boost::system::error_category&, const std::string&) ./boost/system/system_error.hpp:36: note: boost::system::system_error::system_error(int, const boost::system::error_category&) ./boost/system/system_error.hpp:33: note: boost::system::system_error::system_error(boost::system::error_code, const char*) ./boost/system/system_error.hpp:30: note: boost::system::system_error::system_error(boost::system::error_code, const std::string&) ./boost/system/system_error.hpp:27: note: boost::system::system_error::system_error(boost::system::error_code) ./boost/system/system_error.hpp:25: note: boost::system::system_error::system_error(const boost::system::system_error&) libs/chrono/src/posix/chrono.cpp:70: warning: suggest parentheses around ‘&&’ within ‘||’ In file included from libs/chrono/src/chrono.cpp:14: ./boost/chrono/chrono.hpp: In copy constructor ‘boost::chrono::time_point<boost::chrono::monotonic_clock, boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> > >::time_point(const boost::chrono::time_point<boost::chrono::monotonic_clock, boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> > >&)’: ./boost/chrono/chrono.hpp:838: warning: suggest parentheses around ‘&&’ within ‘||’ ./boost/chrono/chrono.hpp:838: warning: suggest parentheses around ‘&&’ within ‘||’ In file included from libs/chrono/src/chrono.cpp:40: libs/chrono/src/posix/chrono.cpp: In static member function ‘static boost::chrono::time_point<boost::chrono::monotonic_clock, boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> > > boost::chrono::monotonic_clock::now()’: libs/chrono/src/posix/chrono.cpp:70: note: synthesized method ‘boost::chrono::time_point<boost::chrono::monotonic_clock, boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> > >::time_point(const boost::chrono::time_point<boost::chrono::monotonic_clock, boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> > >&)’ first required here libs/chrono/src/posix/chrono.cpp: In static member function ‘static boost::chrono::time_point<boost::chrono::monotonic_clock, boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> > > boost::chrono::monotonic_clock::now(boost::system::error_code&)’: libs/chrono/src/posix/chrono.cpp:78: error: no matching function for call to ‘boost::system::error_code::assign(int&, const boost::system::error_category& (&)())’ ./boost/system/error_code.hpp:326: note: candidates are: void boost::system::error_code::assign(int, const boost::system::error_category&) libs/chrono/src/posix/chrono.cpp:84: warning: suggest parentheses around ‘&&’ within ‘||’ In file included from libs/chrono/src/chrono.cpp:14: ./boost/chrono/chrono.hpp: In constructor ‘boost::chrono::time_point<Clock, Duration>::time_point(const Duration&) [with Clock = boost::chrono::system_clock, Duration = boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> >]’: libs/chrono/src/posix/chrono.cpp:31: instantiated from here ./boost/chrono/chrono.hpp:851: warning: suggest parentheses around ‘&&’ within ‘||’ libs/chrono/src/posix/chrono.cpp:31: instantiated from here ./boost/chrono/chrono.hpp:851: warning: suggest parentheses around ‘&&’ within ‘||’ ./boost/chrono/chrono.hpp: In constructor ‘boost::chrono::time_point<Clock, Duration>::time_point() [with Clock = boost::chrono::system_clock, Duration = boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> >]’: libs/chrono/src/posix/chrono.cpp:40: instantiated from here ./boost/chrono/chrono.hpp:850: warning: suggest parentheses around ‘&&’ within ‘||’ libs/chrono/src/posix/chrono.cpp:40: instantiated from here ./boost/chrono/chrono.hpp:850: warning: suggest parentheses around ‘&&’ within ‘||’ ./boost/chrono/chrono.hpp: In member function ‘Duration boost::chrono::time_point<Clock, Duration>::time_since_epoch() const [with Clock = boost::chrono::system_clock, Duration = boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> >]’: libs/chrono/src/posix/chrono.cpp:50: instantiated from here ./boost/chrono/chrono.hpp:864: warning: suggest parentheses around ‘&&’ within ‘||’ ./boost/chrono/chrono.hpp: In constructor ‘boost::chrono::time_point<Clock, Duration>::time_point(const Duration&) [with Clock = boost::chrono::monotonic_clock, Duration = boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> >]’: libs/chrono/src/posix/chrono.cpp:70: instantiated from here ./boost/chrono/chrono.hpp:851: warning: suggest parentheses around ‘&&’ within ‘||’ libs/chrono/src/posix/chrono.cpp:70: instantiated from here ./boost/chrono/chrono.hpp:851: warning: suggest parentheses around ‘&&’ within ‘||’ ./boost/chrono/chrono.hpp: In constructor ‘boost::chrono::time_point<Clock, Duration>::time_point() [with Clock = boost::chrono::monotonic_clock, Duration = boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> >]’: libs/chrono/src/posix/chrono.cpp:79: instantiated from here ./boost/chrono/chrono.hpp:850: warning: suggest parentheses around ‘&&’ within ‘||’ libs/chrono/src/posix/chrono.cpp:79: instantiated from here ./boost/chrono/chrono.hpp:850: warning: suggest parentheses around ‘&&’ within ‘||’ ./boost/chrono/chrono.hpp: In static member function ‘static boost::chrono::duration<Rep, Period> boost::chrono::duration<Rep, Period>::zero() [with Rep = long int, Period = boost::ratio<1l, 1000000000l>]’: ./boost/chrono/chrono.hpp:850: instantiated from ‘boost::chrono::time_point<Clock, Duration>::time_point() [with Clock = boost::chrono::system_clock, Duration = boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> >]’ libs/chrono/src/posix/chrono.cpp:40: instantiated from here ./boost/chrono/chrono.hpp:585: warning: suggest parentheses around ‘&&’ within ‘||’ ./boost/chrono/chrono.hpp:850: instantiated from ‘boost::chrono::time_point<Clock, Duration>::time_point() [with Clock = boost::chrono::system_clock, Duration = boost::chrono::duration<long int, boost::ratio<1l, 1000000000l> >]’ libs/chrono/src/posix/chrono.cpp:40: instantiated from here ./boost/chrono/chrono.hpp:585: warning: suggest parentheses around ‘&&’ within ‘||’ In file included from libs/chrono/src/chrono.cpp:40: ./boost/system/error_code.hpp: At global scope: ./boost/system/error_code.hpp:214: warning: ‘boost::system::posix_category’ defined but not used ./boost/system/error_code.hpp:215: warning: ‘boost::system::errno_ecat’ defined but not used ./boost/system/error_code.hpp:216: warning: ‘boost::system::native_ecat’ defined but not used "g++" -ftemplate-depth-128 -O3 -finline-functions -Wno-inline -Wall -pthread -fPIC -DBOOST_ALL_DYN_LINK=1 -DBOOST_ALL_NO_LIB=1 -DBOOST_CHRONO_USES_STATIC_ASSERT -DBOOST_RATIO_USES_STATIC_ASSERT -DBOOST_SYSTEM_DYN_LINK=1 -DNDEBUG -I"." -c -o "build/boost/bin.v2/libs/chrono/build/gcc-4.4.3/release/threading-multi/chrono.o" "libs/chrono/src/chrono.cpp" ...failed gcc.compile.c++ build/boost/bin.v2/libs/chrono/build/gcc-4.4.3/release/threading-multi/chrono.o... ...failed updating 1 target... ...updated 328 targets...

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[python] division operator in 3.1
by Trigve Siver 09 Aug '10

09 Aug '10

Hi, I've found bug in boost python with division operator. Division operator with custom types doesn't work with python 3.1. It is because there were some changes in this regard in python 3. I've created ticket with patch https://svn.boost.org/trac/boost/ticket/4497 . Can somebody look at it? Thanks Trigve

3 3

[1.44] Release notes
by Daniel James 09 Aug '10

09 Aug '10

Hello, If you haven't done so yet, with the beta coming out it's a good time to add your entries to the release notes so that people know what to test. You can edit the file in subversion here: http://svn.boost.org/svn/boost/website/public_html/beta/feed/history/ Or if you prefer, you can email me the details and I'll add it for you. If you're able to build the release notes, I better warn you that I've changed the build system a little. Recent versions of quickbook are generating slightly different mark up, and if that's used for old entries, they can appear as new in rss feeds. So to avoid that, it now stores a hash of the quickbook files to only update their entry if the source changes. It should just work, you just need to commit the '*-hashes.txt' files at the same time as the rss files. If you want to force an update, you can delete the appropriate line in the text file. thanks, Daniel

5 7

[mpl] BOOST_MPL_HAS_XXX_TEMPLATE_NAMED_DEF
by Edward Diener 09 Aug '10

09 Aug '10

I found the BOOST_MPL_HAS_XXX_TEMPLATE_NAMED_DEF macro in the latest has_xxx.hpp of mpl on the trunk. Is BOOST_MPL_HAS_XXX_TEMPLATE_NAMED_DEF ( and its corresponding BOOST_MPL_HAS_XXX_TEMPLATE_DEF ) scheduled to be added to Boost in an upcoming release ? I find it useful for TMP introspection in much the same way as BOOST_MPL_HAS_XXX_TRAIT_NAMED_DEF ( and its corresponding BOOST_MPL_HAS_XXX_TRAIT_DEF ).

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Re: [boost] [GIL] color convert and color tranfer characteristics
by Fabien Castan 09 Aug '10

09 Aug '10

> Interesting! I would be interested in those implementation for the > toolbox extension. Let me know if you're interested submitting. I can > help out when needed. yes sure. > I'm not sure I follow here. Small code sample possible? You can see the code, it's just the beginning...: http://github.com/nrondaud/TuttleOFX/blob/master/plugins/image/process/colo… You can also see: * some utilities on gil we use (some are only a copy of standard functions adding a progress structure to get progress informations) and others needs a big clean: http://github.com/nrondaud/TuttleOFX/tree/master/libraries/tuttle/src/tuttl… * a copy of boost_gil_extensions with some modifications, in progress too: http://github.com/nrondaud/TuttleOFX/tree/master/3rdParty/boost_gil_extensi… > Right now color_convert doesn't supply passing the rgb_to_luminance > algorithm. But I 'm not sure if that's needed for your case. When you > use the algorithm copy_and_convert_pixels algorithm you pass as the > third parameter the color converter. In your case just define your own > color converter. Yes, but inside a templated function using abstract colors it's not always easy to do. Regards, Fabien

2 1

awesome visualization of Boost SVN repo
by Kenny Riddile 09 Aug '10

09 Aug '10

So I just discovered Gource ( http://code.google.com/p/gource/ ) and it is an absolutely amazing little program. I downloaded and converted the SVN log file for the Boost trunk repository and it was mesmerizing to watch Boost grow before my eyes over the course of 10 years. To save others the time and trouble, I've attached the converted log file so everyone can check it out. Just run: gource --log-format custom boost_gource.log or gource -WIDTHxHEIGHT -f --log-format custom boost_gource.log for full-screen. Have fun :) -Kenny Riddile

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[intrusive] recursive intrusive data structures
by Tim Blechmann 09 Aug '10

09 Aug '10

hi all, is there an easy way to define recursive data structures? something like: struct my_node: boost::intrusive::list_base_hook<> { boost::intrusive::list<my_node> children; }; i am currently using a base class as helper, which causes very dirty code, since i explicitly need to cast from the base to the main class all over the place: struct my_node_base: boost::intrusive::list_base_hook<> {}; struct node: my_node_base { boost::intrusive::list<my_node_base> children; }; thanks, tim -- tim(a)klingt.org http://tim.klingt.org Life is really simple, but we insist on making it complicated. Confucius

2 4

Jamroot changes
by Vladimir Prus 09 Aug '10

09 Aug '10

Folks, I have just checked in a big refactoring of Jamroot. Over the time it has grown too big and too unstructured, so I've added a new module, boostcpp, and moved most of the scary logic there, also clarying that logical blocks. I have tested the changes the best I could, but it is possible something still breaks. So, if you observe some strange behaviour when building trunk, you might want to immediately report that to me. Thanks, Volodya

1 0

Re: [boost] [GIL] color_convert
by fabien.castan＠free.fr 08 Aug '10

08 Aug '10

Hi Christian, > Only for rgba gil is using partial specialization since it's using the > rgb equivalent to do the wanted conversion. I think it's best to stick > with total specialization to avoid confusions and/or breaking other > people's code. > >> The goal of creating this generic conversion is that I can still make the conversion using an intermediate rgb colorspace if there is no specialization. > I think I just said that. ;-) For me, we can do that for all colorspaces. Sorry, I'm not sure to understand your position. You are agree to remove total specialization, even for rgba ? Are you agree to create a generic conversion from Colorspace to C2 for all colorspaces ? default_color_converter_impl<C1,rgba_t> // to remove default_color_converter_impl<rgba_t,C2> // do the same thing for all colorspace > Even when converting from gray to cmyk you wanna create a temporary > rgb value? I believe this is a bad idea for various reasons. Please > correct me when I'm wrong. I think there is only two problems: * approximation * performance But if we want to correct these problems we have only to create the missing specialization. So I don't see any problem. It's always interesting to have all conversions. I don't think we will have a specialization to make the conversion from hsl to cmyk in a near futur. So in these cases propose a solution with approximation and performance cost sounds good to me. And it works fine with user custom colorspaces. Regards, Fabien

2 1

[1.44.0][Math] Requesting permission to merge to release.
by John Maddock 08 Aug '10

08 Aug '10

If possible, I'd like to fix this issue: https://svn.boost.org/trac/boost/ticket/4504 for the final 1.44 release. The fix is trivial: https://svn.boost.org/trac/boost/changeset?reponame=&new=64597%40trunk%2Fbo… but the actual bug manifests as a rather nasty numerical error. There's also a related patch to update the tests, which is slightly more risky in that it adds many new test cases: https://svn.boost.org/trac/boost/changeset?reponame=&new=64597%40trunk%2Fli…. Is it acceptable to merge these to release at this late stage? Thanks, John.

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